Competent stripes for diverse positions of limbs/fins in gnathostome embryos

Sayuri Yonei-Tamura, Gembu Abe, Yoshio Tanaka, Hiromasa Anno, Miyuki Noro, Hiroyuki Ide, Hideaki Aono, Ritsu Kuraishi, Noriko Osumi, Shigeru Kuratani, Koji Tamura

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


Every vertebrate species has its own unique morphology adapted to a particular lifestyle and habitat. Limbs and fins are strikingly diversified in size, shape, and position along the body axis. This diversity in morphology suggests the existence of a variety of embryonic developmental programs. However, comparisons of various embryos suggest common mechanisms underlying limb/fin formation. Here, we report the existence of continuous stripes of competency for appendage formation along the dorsal midline and the lateral trunk of all of the major jawed vertebrate (gnathostome) groups. We also show that the developing fin buds of cartilaginous fish share a mechanism of anterior-posterior axis formation as well as an shh (sonic hedgehog) expression domain in the posterior bud. We hypothesize a continuous distribution of competent stripes that represents the common developmental program at the root of appendage formation in gnathostomes. This schema would have permitted subsequent divergence into various levels of limbs/fins in each animal group.

Original languageEnglish
Pages (from-to)737-745
Number of pages9
JournalEvolution and Development
Issue number6
Publication statusPublished - 2008 Nov


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