An ontology of Drosophila melanogaster developmental stages.
my body has part my brain (continuant parthood, two material entities)
my stomach has part my stomach cavity (continuant parthood, material entity has part immaterial entity)
this year has part this day (occurrent parthood)
a core relation that holds between a whole and its part
Everything has itself as a part. Any part of any part of a thing is itself part of that thing. Two distinct things cannot have each other as a part.
Occurrents are not subject to change and so parthood between occurrents holds for all the times that the part exists. Many continuants are subject to change, so parthood between continuants will only hold at certain times, but this is difficult to specify in OWL. See https://code.google.com/p/obo-relations/wiki/ROAndTime
Parthood requires the part and the whole to have compatible classes: only an occurrent have an occurrent as part; only a process can have a process as part; only a continuant can have a continuant as part; only an independent continuant can have an independent continuant as part; only a specifically dependent continuant can have a specifically dependent continuant as part; only a generically dependent continuant can have a generically dependent continuant as part. (This list is not exhaustive.) A continuant cannot have an occurrent as part: use 'participates in'. An occurrent cannot have a continuant as part: use 'has participant'. An immaterial entity cannot have a material entity as part: use 'location of'. An independent continuant cannot have a specifically dependent continuant as part: use 'bearer of'. A specifically dependent continuant cannot have an independent continuant as part: use 'inheres in'.
x is preceded by y if and only if the time point at which y ends is before or equivalent to the time point at which x starts. Formally: x preceded by y iff ω(y) <= α(x), where α is a function that maps a process to a start point, and ω is a function that maps a process to an end point.
An example is: translation preceded_by transcription; aging preceded_by development (not however death preceded_by aging). Where derives_from links classes of continuants, preceded_by links classes of processes. Clearly, however, these two relations are not independent of each other. Thus if cells of type C1 derive_from cells of type C, then any cell division involving an instance of C1 in a given lineage is preceded_by cellular processes involving an instance of C. The assertion P preceded_by P1 tells us something about Ps in general: that is, it tells us something about what happened earlier, given what we know about what happened later. Thus it does not provide information pointing in the opposite direction, concerning instances of P1 in general; that is, that each is such as to be succeeded by some instance of P. Note that an assertion to the effect that P preceded_by P1 is rather weak; it tells us little about the relations between the underlying instances in virtue of which the preceded_by relation obtains. Typically we will be interested in stronger relations, for example in the relation immediately_preceded_by, or in relations which combine preceded_by with a condition to the effect that the corresponding instances of P and P1 share participants, or that their participants are connected by relations of derivation, or (as a first step along the road to a treatment of causality) that the one process in some way affects (for example, initiates or regulates) the other.
Creating this relation as a temporary fix, pending adding the axiom occurent_part_of subpropertyof happens_during to RO
A part of relation that applies only between occurents.
X immediately_preceded_by Y iff: end(X) simultaneous_with start(Y)
X immediately_precedes_Y iff: end(X) simultaneous_with start(Y)
X happens_during Y iff: (start(Y) before_or_simultaneous_with start(X)) AND (end(X) before_or_simultaneous_with end(Y))
x overlaps y if and only if there exists some z such that x has part z and z part of y
http://purl.obolibrary.org/obo/BFO_0000051 some (http://purl.obolibrary.org/obo/BFO_0000050 some ?Y)
The life of an individual of the species Drosophila melanogaster, from fertilization to death.
A temporal subdivision of a developmental process.
Earliest stage of ovarian cyst development - lasts while the 16 cell cyst is within the germarium (region 3).
Oogenesis stage that begins when the cyst leaves the germarium (from this point the cyst is referred to as an egg chamber). During this stage, polyploidation of the nurse cells begins, they reach a ploidy of 8C, and follicle cells start to divide.
Oogenesis stage that begins when the oocyte chromosomes condense into a karyosome attached to a distinctive spherical structure known as an endobody. The oocyte nucleolus disappears completely. During this stage, nurse cell ploidy reaches 16C.
Oogenesis stage that begins when the nurse cells chromosomes become bulbous. Nurse cell chromosomes during this stage are polytene and reach a ploidy of 32C. The egg chamber is oval shaped.
Oogenesis stage that begins when nurse cell chromosomes are no longer bulbous - the association between homologs weakens so that these chromosomes no longer have a polytene structure. During this stage, posterior nurse cell nuclei have a higher ploidy (64C) than anterior ones.
Oogenesis stage during which follicle cell division ceases.
Oogenesis stage during which polyploidation and enlargement of follicle cells begins. Nurse cell ploidy ranges from 256C (anterior) to 512C (posterior) and the egg chamber gains an elongated shape.
Oogenesis stage which begins when yolk first appears in the oocyte. Follicle cell migration over the oocyte begins during this stage (although mostly occurs during stage 9).
Oogenesis stage that begins when the border cells begin to migrate. During this stage: the oocyte is about 1/3 the length of the egg chamber with its nucleus located antero-dorsally; follicle cell migration results in an anterior to posterior gradient of follicle cell thickness with posterior cells being thicker (-> columnar) and posterior cells thinner ( -> squamous); border cell migration begins and ends; secretion of vitelline membrane begins.
Oogenesis stage that begins when all the oocyte associated follicular epithelium is columnar and all of the nurse cell associated follicular epithelium is completely squamous and ends with the beginning of nurse cell dumping.
Oogenesis stage which begins when all the oocyte associated follicular epithelium is columnar and all of the nurse cell associated follicular epithelium is completely squamous and ends when centripetal follicle migration begins. During this stage, the migrating border cells reach the oocyte. The oocyte is about 50% egg chamber length.
Oogenesis stage that begins when the centripetal follicle cells begin to migrate. As a result, the vitelline membrane extends into the opercular region. This stage ends when nurse cell dumping begins.
Oogenesis stage that begins when nurse cell dumping begins and development of the wax layer begins. The dorsal appendages begin to form during this stage. This stage ends when dying nurse cells form an anterior cap to the oocyte.
Oogenesis stage that begins when dying nurse cells form an anterior cap to the oocyte. Shortly after this, nurse cell dumping and growth of the oocyte are complete. Elongation of the dorsal appendages and formation of the innermost chorionic layer and endochorion begins during this stage.
Innermost chorionic layer and endochorion begin to form in the anterior of the follicle.
Secretion of innermost chorionic layer and endochorion begins in the main follicle cells.
Formation of specialized endochorion structures in the anterior of the follicle: branches in the developing dorsal appendages; compact endochorion lacking the pillars seen in the rest of the follicle.
Oogenesis stage that begins when the micropyle begins to form. At the beginning of this stage, about 12-15 nurse cell nuclei remain at the anterior of the oocyte. By the end of this stage, none of these nuclei remain. Oocyte meiosis up to arrest at full metaphase I occurs during this stage.
Oogenesis stage during which 12-15 nurse cell nuclei remain at the anterior of the oocyte. At this stage, the oocyte nucleus has reached its maximum volume and its chromosomes are compressed into a 5-7 micrometer karyosome.
Temporal ordering number - 10210. An alternative division of stage 13 into two sub-stages, A and B, has been defined on the basis of chorion development (see FBrf0043885). This ontology uses an alternative subdivision based on nurse cell nucleus number and oocyte meiosis, as the former at least, is easier to score than chorion ultrastructure.
Oogenesis stage during which 9-11 nurse cell nuclei remain at the anterior of the oocyte. During this stage, the nuclear membrane of the oocyte nucleus disappears, indicating the start of meiotic pro-metaphase.
Temporal ordering number - 10220. An alternative division of stage 13 into two sub-stages, A and B, has been defined on the basis of chorion development (see FBrf0043885). This ontology uses an alternative subdivision based on nurse cell nucleus number and oocyte meiosis, as the former at least, is easier to score than chorion ultrastructure.
Oogenesis stage during which only 7-8 nurse cell nuclei remain at the anterior of the oocyte. At the beginning of this stage, oocyte chromosome bivalents separate from each other - indicating mid-prometaphase of oocyte meiosis.
Oogenesis stage during which only 5-6 nurse cell nuclei remain at the anterior of the oocyte. The oocyte nucleus is in late prometaphase:the bivalents arrange themselves in on the equatorial plane of the spindle; homologous centromeres are pulled towards the poles.
The last stage of oogenesis. This stage begins when no nurse cell nuclei remain at the anterior of the egg (chamber). Exochorion formation and secretion occurs during this stage. The dorsal appendages complete their elongation and the follicle cells die.
Secretion and formation of the outer endochorionic network by throughout the follicle. Crystallization of the innermost chorionic layer of the main body follicle cells.
Secretion of the exochorion begins and ends.
The stage of the Drosophila life-cycle from maturation of an egg to the end of fertilization. At the beginning of this stage, the nucleus is arrested in meiotic metaphase I. The completion of meiosis and the start of protein synthesis are triggered by ovulation. If the female has already mated, fertilization begins during meiosis.
The stage of the Drosophila life-cycle from fertilization to hatching.
The embryonic stage that lasts from the end of fertilization to the end of the second nuclear division. Duration at 25 degrees C: approximately 25 minutes (0-25 minutes after egg laying).
The first mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
Nuclear divisions 3-8. The egg cytoplasm contracts producing a clear separation from the vitelline membrane and empty spaces at the anterior and posterior. The cleavage nuclei migrate towards the periphery. Duration at 25 degrees C approximately 40 minutes (25-65 minutes AEL).
The second mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The third mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The fourth mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The fifth mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The sixth mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The seventh mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The eighth mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
Nuclear division 9. The cleavage nuclei complete their migration to the periphery. Polar buds form at the posterior pole and divide once. Duration at 25 degrees C: approximately 15 minutes (65-80 minutes after egg laying).
The ninth mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The tenth mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
Nuclear division 10-13. Polar buds divide twice and become tightly grouped at the posterior pole by the end of this stage. Nuclei visible at the rim of the embryo. Stage 4 ends with the beginning of cellularization. Duration at 25 degrees C: approximately 50 minutes (80-130 minutes after egg laying).
The 11th mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The 12th mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
The 13th mitotic cell cycle of embryogenesis. This occurs synchronously across the embryo.
Cellularization. Stage 5 begins when cellularization starts. Near the end of this stage the pole cells begin to migrate dorsally and ventral midline cells acquire an irregular, wavy appearance. Stage 5 ends when ventral furrow formation becomes apparent. Duration at 25 degrees: approximately 40 minutes (130-170 minutes after egg laying).
The 14th mitotic cell cycle of embryogenesis. This is the first round of nuclear division to occur in a cellularized embryo, so this is the first round of cell division. Embryonic cycle 14 mitosis is asynchronous across the embryo, but occurs synchronously within discrete domains, known as mitotic domains.
Temporal ordering number - 255. The asynchronous nature of cycle 14 divisions means that this is not very useful for annotating stage. If possible a standard embryonic stage should be used instead.
The interphase of embryonic cycle 14. This begins at the same time as cellularization and is of variable length depending on cell identity: embryonic cycle 14 M phase (14B) is asynchronous across the embryo, but occurs synchronously within discrete domains, known as mitotic domains.
The M-phase of embryonic cycle 14. This is asynchronous across the embryo, but occurs synchronously within discrete domains, known as mitotic domains.
Temporal ordering number - 257. Not to be confused with mitotic domain 14B, which is a domain of cells in the dorsal midline of the head that don't undergo a 14th division (Foe, 1989). The asynchronous nature of cycle 14 divisions means that this is not very useful for annotating stage. If possible a standard embryonic stage should be used instead.
The 15th cell cycle of embryogenesis. Asynchronous.
Temporal ordering number - 285. The asynchronous nature of cycle 15 divisions means that this is not very useful for annotating stage. If possible a standard embryonic stage should be used instead.
The 16th cell cycle division of embryogenesis. Asynchronous.
Temporal ordering number - 295. The asynchronous nature of cycle 16 divisions means that this is not very useful for annotating stage. If possible a standard embryonic stage should be used instead.
Stages during which gastrulation occurs. 6-8.
Stage 6 begins when the ventral furrow becomes apparent, an event which is followed rapidly by the formation of the cephalic furrow. Stage 6 ends when the pole cells have adopted a dorsal (horizontal) position at the posterior. Duration at 25 degrees C: approximately 10 minutes (170-180 minutes after egg laying).
Stage 7 begins when the pole cells have adopted a dorsal (horizontal) position at the posterior. Invagination of the anterior and posterior midgut and hindgut follows. The 'discoid plate' that carries the pole cells forms a pocket. Transverse furrows (dorsal folds) form on the dorsal surface. This stage ends when the anterior wall of the amnioproctodeal invagination starts moving anteriorly and the pole cells are no longer visible externally. Duration at 25 degrees C: approximately 10 minutes (180-190 minutes after egg laying).
Stages during which the germ band is extended - 9-12.
Stage 8 starts with the rapid phase of germ band extension and ends with the beginning of mesodermal segmentation. By the end of this stage germ band extension has progressed to the point where the proctodeal opening is at about 60% egg length and the dorsal folds (transverse furrows) are no longer visible. Duration at 25 degrees C: approximately 30 minutes (190-220 minutes after egg laying).
Stage 9 begins when mesodermal segmentation becomes (transiently) visible\, and ends with the appearance of the stomodeal invagination slightly ventral to the anterior pole. Duration at 25 degrees C: approximately 40 minutes (220-260 minutes after egg laying).
Stage 10 begins with the appearance of the stomodeal invagination, slightly ventral to the anterior pole. Periodic furrows appear in the embryonic epidermis around the middle of the stage. The germ band continues to extend, reaching its maximum extent of 75% egg length towards the end of the stage. The end of the stage is marked by the beginning of invagination of the tracheal placodes. Duration at 25 degrees : approximately 60 minutes (260-320 minutes after egg laying).
Stage 11 begins with the invagination of the tracheal placodes. Para-segmental furrow form and segment boundary furrows become deep folds. Within the head, gnathal protuberances become apparent. The end of this stage is signaled by the appearance of a distinct cleft at the posterior pole of the embryo, which becomes detached from the vitelline membrane. This marks the beginning of germ-band retraction. Duration at 25 degrees C: approximately 120 minutes (320-440 minutes after egg laying).
Germ band retraction. Stage 12 begins when germ-band retraction starts and ends when this process is complete so that the prospective anal plate occupies the posterior pole. During this stage the posterior and anterior midgut primordia meet and fuse and the tracheal pits fuse to form the tracheal tree. Duration at 25 degrees C: approximately 120 minutes (440-560 minutes after egg laying).
Stage 13 begins at the completion of germ-band retraction, when the prospective anal plate occupy the posterior pole. The dorsal ridge becomes apparent externally; the clypeolabrum retracts, leaving a triangular shaped gap at the anterior pole; the labium moves to the ventral midline. This stage ends when head involution begins. Duration at 25 degrees C: Approximately 60 minutes (560-620 minutes after egg laying).
Stage 14 begins with the initiation of head involution. Closure of the midgut around the yolk and dorsal closure continue. Dorsal closure is 80% complete by the end of this stage. This stage ends with the appearance of the second midgut constriction. Duration at 25 degrees C: approximately 60 minutes (620-680 minutes after egg laying).
Stage 15 begins with the appearance of the second midgut constriction. During this stage the 1st and 3rd midgut constrictions form, dorsal closure is completed, and epidermal segmentation is accomplished. This stage ends when the intersegmental grooves can be distinguished at mid-dorsal level. Duration at 25 degrees C: approximately 100 minutes (680-780 minutes after egg laying).
Stage 16 begins when the intersegmental grooves can be distinguished at mid-dorsal level, and ends when the dorsal ridge (frontal sac) has overgrown the tip of the clypeolabrum, which is thereby enclosed in the atrium. During this stage the ventral cord retracts to about 60% egg length. Duration at 25 degrees C: approximately 180 minutes (780-960 minutes after egg laying).
Stage 17 begins when the dorsal ridge (frontal sac) has overgrown the tip of the clypeolabrum, which is thereby enclosed in the atrium. It lasts until hatching of the embryo (approximately 24 hours after egg laying), during which time much terminal differentiation occurs, the tracheal tree fills with air, so becoming completely visible, and the ventral cord continues to retract. Duration at 25 degrees C: approximately 8 hours (16-24 hours after egg laying).
The stage of the Drosophila life-cycle from hatching to the beginning of puparium formation.
The first larval instar begins at hatching and ends at the first larval molt. Anterior spiracles are not yet present; posterior spiracles have two openings each. Salivary glands are very small and all cells are uniform in size. Mouth hooks typically have one tooth. Duration at 25 degrees C: approximately 25 hours (24-49 hours after egg laying; 0-25 hours after hatching).
The second larval instar begins at the first larval molt and ends at the second larval molt. Larvae are actively feeding and crawling in the food. Distinct anterior spiracles are present as enlargements at the end of the tracheal trunk, but not open to the outside; posterior spiracles have three openings each, and four groups of small unbranched hairs. The salivary glands extend to the first abdominal segment, and have cells that are uniform in size. Mouth hooks typically have two or three teeth. Duration at 25 degrees C: approximately 23 hours (49-72 hours after egg laying; 25-48 hours after hatching).
The third larval instar begins at the second larval molt and ends at puparium formation. Anterior spiracles are open to the outside; posterior spiracles have three openings each, and four groups of large branched hairs. The salivary glands extend to the second abdominal segment, with cells larger in the posterior than in the anterior of the gland. Mouth hooks typically have 9-12 teeth. About 24 hours before pupariation (at 25 degree C), larvae stop feeding and climb away from their food. Duration at 25 degrees C: approximately 48 hours (72-120 hours after egg laying; 48-96 hours after hatching).
Third instar larva prior to the wandering stage (approximately the first 24 hours of the third instar larval stage under standard conditions at 25'C.).
Stage of the third larval instar during which the larva wanders out of the food and climbs. Under optimum conditions at 25'C, this occurs approximately 24 hours after the start of the third instar larval stage.
The prepupal stage begins at puparium formation and ends when larval/pupal apolysis is complete, as indicated by the completion of imaginal head sac eversion and the expulsion of the oral armature of the larva. Duration at 25 degrees C: approximately 12 hours. (120-132.2 hours after egg laying; 0-12.2 hours after puparium formation).
Extends from puparium formation through tanning of the pupal cuticle. Posterior spiracles and ridge between anterior spiracles tan orange. Wriggling stops completely. Puparium becomes brown to the unaided eye. Duration at 25 degrees C: approximately 20 minutes. (120-120.3 hours after egg laying; 0-0.3 hours after puparium formation).
Male gonads become less distinct. Oral armature stops moving permanently. Dorsal medial abdominal contractions stop. Gas bubble becomes visible within abdomen. Duration at 25 degrees C: approximately 100 minutes. (120.3-122 hours after egg laying; 0.3-2 hours after puparium formation).
Ridge of the operculum becomes distinct. Puparium begins to separate from underlying epidermis. Becomes positively buoyant. Duration at 25 degrees C: approximately 4 hours, 45 minutes. (122-126.75 hours after egg laying; 2-6.75 hours after puparium formation).
Prepupal stage P4 begins as the lateral trunk trachea become obscured and ends when the imaginal head sac is everted and the oral armature of the larva is expelled. Duration at 25 degrees C: approximately 5 hours, 30 minutes. (126.75-132.2 hours after egg laying; 6.75-12.2 hours after puparium formation).
Lateral trunk tracheae become obscured. Dorsal medial abdominal contractions occur. Everted leg and wing discs become visible. Bubble appears in posterior of puparium, displacing the pupa anteriorly; abdominal bubble disappears. Duration at 25 degrees C: approximately 5 hours, 15 minutes. (126.75-132 hours after egg laying; 6.75-12 hours after puparium formation).
Bubble is displaced to anterior end of the puparium, and pupa withdraws to the posterior end. Imaginal head sac is everted and the oral armature of the larva is expelled. Duration at 25 degrees C: approximately 12 minutes. (132-132.2 hours after egg laying; 12-12.2 hours after puparium formation).
The pupal stage starts once larval/pupal apolysis is complete as indicated by the expulsion of the larval armature. Early in this stage, the legs and wings reach full extension along the abdomen. The stage ends when the pupal cuticle separates from the underlying epidermis (pupal/adult apolysis), and the eye cup becomes yellow at its periphery. Duration at 25 degrees C: approximately 32 hours. (132.2-164.3 hours after egg laying; 12.2-44.3 hours after puparium formation).
Temporal ordering number - 570. DISAMBIGUATION: In Drosophila lab vernacular, the term 'pupal stage' is often used to refer to the entire period from formation of the puparium to eclosion. However, this does not correspond to the standard usage of 'pupal stage' for Cyclorrhaphous flies (for discussion see: FBrf0087128). Briefly: formation of the puparium (hardening of the larval cuticle) marks the beginning of the pre-pupal stage. The pupal stage begins following pupal/larval apolysis - detachment of the larval epidermis from the puparium. In Drosophila, the outward sign of the completion of apolysis is the eversion of the head and expulsion of the larval mouthparts (FBrf0036849). We use P-stage to refer to the stage from pupariation to eclosion, and restrict pupal stage to its standard usage.
Pupal stage P5 starts when the legs and wings reach full extension along the abdomen and ends as the Malpighian tubules become prominent and green. Duration at 25 degrees C: approximately 6 hours, 30 minutes. (132.2-138.7 hours after egg laying; 12.2-18.7 hours after puparium formation).
Legs and wings reach full extension along abdomen. Enlarged initial segments of anterior pair Malpighian tubules move from thorax into abdomen. Translucent patch that lacks adhering fat body cells becomes discernible in the middle of the eye region. Pair of white Malpighian tubules becomes visible dorsally in the abdomen. Duration at 25 degrees C: approximately 66 minutes. (132.2-133.3 hours after egg laying; 12.2-13.3 hours after puparium formation).
Malpighian tubules become prominent and green. Duration at 25 degrees C: approximately 5 hours, 25 minutes. (133.3-138.7 hours after egg laying; 13.3-18.7 hours after puparium formation).
Dark green 'yellow body' appears between the anterior ends of the two Malpighian tubule segments, mid-dorsally at the anterior of the abdomen. Duration at 25 degrees C: approximately 13 hours, 45 minutes. (138.7-152.4 hours after egg laying; 18.7-32.4 hours after puparium formation).
The 'yellow body' moves back between the Malpighian tubules. The transparent pupal cuticle separates from the underlying epidermis. Eye cup becomes yellow at its perimeter. Duration at 25 degrees C: approximately 12 hours. (152.4-164.3 hours after egg laying; 32.4-44.3 hours after puparium formation).
Pale yellow pigmentation spreads inwards across the eye. Eye color becomes bright yellow, then changes to amber. Duration at 25 degrees C: approximately 12 hours 20 minutes. (164.3-176.6 hours after egg laying; 44.3-56.6 hours after puparium formation).
Eye color darkens to deep amber, then becomes pale pink. Duration at 25 degrees C: approximately 18 hours. (176.6-194.5 hours after egg laying; 56.6-74.5 hours after puparium formation).
Eyes become bright red. Orbital and ocellar bristles and vibrissae darken. Duration at 25 degrees C: approximately 6 minutes. (194.5-194.6 hours after egg laying; 74.5-74.6 hours after puparium formation).
Thoracic bristles become visible, and the tips of the wings turn grey. Duration at 25 degrees C: approximately 2 hours. (194.6-196.6 hours after egg laying; 74.6-76.6 hours after puparium formation).
Dorsal thoracic microchaetes and macrochaetes become visible. Duration at 25 degrees C: approximately 80 minutes (194.6-195.5 hours after egg laying; 74.6-75.9 hours after puparium formation).
Tips of folded wings become grey. Duration at 25 degrees C: approximately 45 minutes (195.5-196.6 hours after egg laying; 75.9-76.6 hours after puparium formation).
Pharate adult stage P12 begins as the abdominal tergite bristles become visible, and ends as the wings darken to black. Duration at 25 degrees C: approximately 2 hours. (196.6-198.6 hours after egg laying; 76.6-78.6 hours after puparium formation).
Bristles of the abdominal tergites become visible, and the wings become grey. Duration at 25 degrees C: approximately 55 minutes. (196.6-197.5 hours after egg laying; 76.6-77.5 hours after puparium formation).
Sex combs darken in males. Wings darken to black. Duration at 25 degrees C: approximately 65 minutes. (197.5-198.6 hours after egg laying; 77.5-78.6 hours after puparium formation).
Tarsal bristles darken and claws become black. Duration at 25 degrees C: approximately 3 hours, 20 minutes. (198.6-201.9 hours after egg laying; 78.6-81.9 hours after puparium formation).
The meconium appears dorsally at the posterior tip of the abdomen. Duration at 25 degrees C: approximately 9 hours, 30 minutes (201.9-211.5 hours after egg laying; 81.9-91.5 hours after puparium formation).
Pharate adult stage P15 begins with the tanning of the tergites and ends with eclosion. Duration at 25 degrees C: approximately 8 hours, 30 minutes. (211.5-220 hours after egg laying; 91.5-100 hours after puparium formation).
Tanning of the tergites obscures the Malpighian tubules and the 'yellow body'. Legs begin to twitch; fly is able to walk if puparium is removed prematurely. Ptilinum expands by hydrostatic pressure, opening the operculum. Duration at 25 degrees C: approximately 8 hours, 6 minutes. (211.5-219.6 hours after egg laying; 91.5-99.6 hours after puparium formation).
Stage which starts when the operculum opens and ends when eclosion is completed. Duration at 25 degrees C: approximately 24 minutes. (219.6-220 hours after egg laying; 99.6-100 hours after puparium formation).
The stage of the Drosophila life-cycle from eclosion to death.
Newly eclosed adult stage. Animal free of pupal case. Runs rapidly to find site for wing expansion. Wings are folded back and black against a very pale abdomen.
Temporal ordering number - 785. The time at which eclosed flies settle down for wing expansion can vary greatly. If they fail to find a suitable site then expansion can be delayed by several hours.
Stage, shortly after eclosion, during which the wings expand. During wing expansion, the abdomen pulsates and the hind legs stroke the wings vigorously for several minutes at a time. The stage ends when the wings are folded down over the abdomen, which has become broader and shorter, and the wing cuticle has lost its folds. The stage lasts around 15 minutes at 25'C.
This should be considered as a type of cell rather than as a stage. Please use FBbt:00005412.
The developing adult after pupal-adult apolysis, i.e.- from stage P8 (when yellow eye color first becomes visible through the pupal case), to eclosion. Duration at 25 degrees C: approximately 55.7 hours (164.3-220 hours after egg laying; 44.3-100 hours after puparium formation).
Adult stage immediately after wing expansion, during which tanning of the cuticle is completed. This stage lasts approximately 45 minutes at 25'C.
The stage of the Drosophila life-cycle from the formation of the puparium (beginning of the prepupal stage) to eclosion.
Temporal ordering number - 490. DISAMBIGUATION: In Drosophila lab vernacular, the term 'pupal stage' is often used to refer to the entire period from formation of the puparium to eclosion. However, this does not correspond to the standard usage of 'pupal stage' for cyclorrhaphous flies (for discussion see: FBrf0087128). Briefly: formation of the puparium (hardening of the larval cuticle) marks the beginning of the pre-pupal stage. The pupal stage begins following pupal/larval apolysis - detachment of the larval epidermis from the puparium. In Drosophila, the outward sign of the completion of apolysis is the eversion of the head an expulsion of the larval mouthparts (FBrf0036849). We use P-stage to refer to the stage from pupariation to eclosion, and restrict pupal stage to its standard usage.
Oogenesis stage that begins when nurse cell dumping begins and development of the wax layer begins and ends when the dorsal appendages begin to form.
Oogenesis stage that begins when endochorion begins to form at the anterior pole, a process which includes the beginning of formation of the dorsal appendages. During this stage, the follicle cells secrete membranous vesicles that form irregular extracellular plaques. This stage ends when dying nurse cells form an anterior cap to the oocyte.
Stage which begins when wandering third instar larva stops crawling. The larva everts its anterior spiracles during this stage.
The anterior spiracles are fully everted, with 7-9 finger-like projections. The body shortens, withdrawing three apparent abdominal segments and the larva sticks to its substrate.
Oogenesis stage during which the number of nurse cell nuclei at the anterior of the oocyte reduce from 4 to zero. The oocyte chromosomes reach full metaphase I during this stage, at which point meiosis is arrested (until fertilization).
Third instar larva from the beginning of wandering to the beginning of puparium formation.
A cycle of nuclear division during the embryogenesis of Drosophila melanogaster. The first 13 cycles are synchronous throughout the embryo and occur their timing relative to other developmental processes is invariant. Later nuclear division cycles are asynchronous across the embryo although may be more locally synchronized.
A temporal subdivision of a Drosophila life, delimited by major transitions in the circumstances of the organism, such as: fertilization; hatching; pupal ecdysis; eclosion.
Temporal subdivision of life based on time elapsed since some key developmental transition, such as fertilization, hatching or eclosion.
Temporal subdivision of adulthood in days post-eclosion.
The first two hours of embryonic stage 17 at 25'C. (Approximately 16-18 hours at 25'C after egg laying).
Temporal ordering number - 391. Should not be used to stage embryos whose development is at temperatures other than 25'C.
Hours 2-4 of embryonic stage 17 at 25'C. (Approximately 18-20 hours at 25'C after egg laying).
Temporal ordering number - 392. Should not be used to stage embryos whose development is at temperatures other than 25'C.
Hours 4-6 of embryonic stage 17 at 25'C. (Approximately 20-22 hours at 25'C after egg laying).
Temporal ordering number - 393. Should not be used to stage embryos whose development is at temperatures other than 25'C.
Hours 6-8 (the last two hours) of embryonic stage 17 at 25'C. (Approximately 22-24 hours at 25'C after egg laying).
Temporal ordering number - 394. Should not be used to stage embryos whose development is at temperatures other than 25'C.
The substage of the wandering third instar larval stage, prior to the beginning of clearance of the gut.
Temporal ordering number - 462. This is commonly assayed by adding 0.5% bromophenol blue to the food and looking for wandering third instar larvae with the same color guts (dark blue) as feeding larvae (Andres and Thummel, 1994). Larvae at this stage are in chromosomal puff stage 1 (Andres and Thummel, 1994).
The substage of the wandering third instar larval stage when the larva has partially cleared its gut contents.
Temporal ordering number - 465. This is commonly assayed by adding 0.5% bromophenol blue to the food and looking for wandering third instar larvae with lighter colored guts (light blue) than feeding larvae (Andres and Thummel, 1994). Larvae at this stage are mainly in chromosomal puff stages 2-7 (Andres and Thummel, 1994).
third instar - partially cleared gut stage
The substage of the wandering third instar larval stage when the larva has cleared its gut contents.
Temporal ordering number - 467. This is commonly assayed by adding 0.5% bromophenol blue to the food and looking for wandering third instar larvae with guts lacking any blue stain (Andres and Thummel, 1994). Larvae at this stage are mainly in chromosomal puff stages 7-9 and pupate within 1-6 hours (Andres and Thummel, 1994.
The interphase (GO:0051325) of an embryonic cycle.
The M-phase (GO:0000279) of an embryonic cycle.
The developmental stage that lasts from eclosion of the adult from the pupal case until tanning is complete (the end of adult stage A3).
Life stage from the end of adult stage A3, when tanning is complete, to death.