Fig. 12 in Development and gastrulation in Hyloxalus vertebralis and Dendrobates auratus (Anura: Dendrobatidae)

Fig. 12. Gastrulation of dendrobatid frogs in comparison with X. laevis. To facilitate the comparison, the stages (st) are given as column headings: Stage 12, late-gastrula; Stage 12.5, advanced late-gastrula; Stage 13, slit blastopore stage. The letters in the upper right-hand corner indicate the species: Ab, Ameerega bilinguis; Da, Dendrobates auratus; Ea, Epipedobates anthonyi; Et, Epipedobates tricolor; Hv, Hyloxalus vertebralis; Xl, Xenopus laevis. (A–C) Diagrams of X. laevis embryos. (D–R) Sagittal sections of gastrulae. (D–F) Embryos of E. anthonyi. (The section in E was reproduced from Montenegro–Larrea and del Pino, 2011). (G–I) Embryos of E. tricolor. (J–L) Embryos of H. vertebralis. (M–O) Embryos of A. bilinguis. (P–R) Embryos of D. auratus. a, archenteron; bl, blastocoel; cbc; circumblastoporal collar; dl, dorsal blastopore lip; yp, yolk plug.