... Opossum Turtle Axolotl Xenopus Increased heterogeneity in neural progenitor pools and the precise regulation of progenitor dynamics are essential for the evolution of intricate brain architectures. In the developing mammalian neocortex, two types of neuronal progenitors are distinguished...

...Jacqueline E. Moustakas-Verho; Roland Zimm; Judith Cebra-Thomas; Netta K. Lempiäinen; Aki Kallonen; Katherine L. Mitchell; Keijo Hämäläinen; Isaac Salazar-Ciudad; Jukka Jernvall; Scott F. Gilbert The origin of the turtle shell over 200 million years ago greatly modified the amniote body plan...

... criteria and expression patterns of Darpp-32, Tbr1, Nkx2.1 and Pax6 genes, we show in slice cultures of turtle embryos that early cohorts of tangentially migrating cells are released from the medial ganglionic eminence between stages 14 and 18. Additional populations migrate tangentially from the dorsal...

...Hiroshi Nagashima; Shigehiro Kuraku; Katsuhisa Uchida; Yoshie Kawashima Ohya; Yuichi Narita; Shigeru Kuratani The chelonian carapace is composed of dorsolaterally expanded ribs; an evolutionary change in the rib-patterning program is assumed to be related to this novelty. Turtle embryos exhibit...

... of the forebrain in mouse, chick, turtle and frog. Their expression domains delineated three main telencephalic subdivisions in all species at the onset of neurogenesis: the pallial, intermediate and striatal neuroepithelial domains. The fate of the intermediate subdivisions diverged, however, between species...