Template:Bat timeline table1
Stage |
Key features |
Somites |
Age |
Uterus diameter |
Crown-rump length |
Mass |
12 |
Forelimb buds form; tail bud forms; caudal neuropore closes; 3 pharyngeal arches. |
21-29 |
40 |
5.75 |
3.4 |
4.3 |
14 |
Retinal pigment; nasal pits; end of somitogenesis; propatagium and plagiopatagium primordia; hindlimb AER. |
36-40 |
44 |
6.95 |
5.35 |
24.6 |
15 |
Hand plate and footplate form; lens vesicle; auditory hillocks; premaxillary centers. |
46 |
8.65 |
7.45 |
56 | |
16 |
Nose-leaf primordium; pinna and tragus form; forelimb digital condensations, uropatagium primordium. |
50 |
12.06 |
8.66 |
110 | |
17 |
Tongue protruding; cervical flexure straightens; hindlimb interdigit tissue receding; eyes begin to close. |
54 |
13.45 |
9.15 |
114 | |
18 |
Free thumb; head and body smoother, rounder; eyes half-closed; postaxial flexure at wrist; calcar. |
60 |
16.32 |
12.35 |
278 | |
20 |
Distal forelimbs overlap over face; head larger; eyelids cover pigmented retina; claw primordia form. |
70 |
20.0 |
16.35 |
617 | |
22 |
Prominent, triangular nose-leaf; eyelids reopening; wing membranes corrugated; claws pigmented, hooked. |
80 |
23.03 |
20.02 |
1527 | |
24 |
Fetal period commences; eyes completely open; face and nose-leaf pigmenting. |
90 |
23.53 |
21.13 |
2097 | |
Values are mean n= 2-6, +/- standard deviation, original table contains more detailed data. |
- ↑ Cretekos CJ, Weatherbee SD, Chen CH, Badwaik NK, Niswander L, Behringer RR & Rasweiler JJ. (2005). Embryonic staging system for the short-tailed fruit bat, Carollia perspicillata, a model organism for the mammalian order Chiroptera, based upon timed pregnancies in captive-bred animals. Dev. Dyn. , 233, 721-38. PMID: 15861401 DOI.