Table 1.

Modes of somitogenesis in frogs

Species	Egg size, mm	Gastrulation time, h*	Mode of somitogenesis	Refs.
X. laevis	1.3	14	cr	(28, 32)
E. randi	1.1	24	ci
E. coloradorum	1.3	24	ci
C. machalilla	1.6	96	ci
E. anthonyi	2.0	96	ci
E. tricolor	2.0	96	ci
G. riobambae	3.0	336	ci	(33)
B. variegata	3.0	—	ci	(28)

cr, cell rotation; ci, cell interdigitation.

*Time from fertilization to the completion of gastrulation.