Template:Bat timeline table1

From Embryology
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Embryonic Bat Stages Carollia perspicillata[1]

Stage

Key features

Somites

Age
(dpc)

Uterus diameter
(mm)

Crown-rump length
(mm)

Mass
(mg)

12

Forelimb buds form; tail bud forms; caudal neuropore closes; 3 pharyngeal arches.

21-29

40

5.75
(+/- 0.64)

3.4
(+/- 0.42)

4.3
(+/- 1.7)

14

Retinal pigment; nasal pits; end of somitogenesis; propatagium and plagiopatagium primordia; hindlimb AER.

36-40

44

6.95
(+/- 0.44)

5.35
(+/- 0.24)

24.6
(+/- 3.6)

15

Hand plate and footplate form; lens vesicle; auditory hillocks; premaxillary centers.

46

8.65
(+/- 1.20)

7.45
(+/- 0.92)

56
(+/- 13)

16

Nose-leaf primordium; pinna and tragus form; forelimb digital condensations, uropatagium primordium.

50

12.06
(+/- 1.45)

8.66
(+/- 1.05)

110
(+/- 30)

17

Tongue protruding; cervical flexure straightens; hindlimb interdigit tissue receding; eyes begin to close.

54

13.45
(+/- 1.34)

9.15
(+/- 1.34)

114
(+/- 45)

18

Free thumb; head and body smoother, rounder; eyes half-closed; postaxial flexure at wrist; calcar.

60

16.32
(+/- 0.98)

12.35
(+/- 1.16)

278
(+/- 83)

20

Distal forelimbs overlap over face; head larger; eyelids cover pigmented retina; claw primordia form.

70

20.0
(+/- 3.54)

16.35
(+/- 1.06)

617
(+/- 156)

22

Prominent, triangular nose-leaf; eyelids reopening; wing membranes corrugated; claws pigmented, hooked.

80

23.03
(+/- 2.68)

20.02
(+/- 0.26)

1527
(+/- 208)

24

Fetal period commences; eyes completely open; face and nose-leaf pigmenting.

90

23.53
(+/- 0.64)

21.13
(+/- 0.06)

2097
(+/- 199)

Values are mean n= 2-6, +/- standard deviation, original table contains more detailed data.
  1. 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.