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A new evolutionary scenario for the vertebrate jaw
Author(s) -
Shigetani Y.,
Sugahara F.,
Kuratani S.
Publication year - 2005
Publication title -
bioessays
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.175
H-Index - 184
eISSN - 1521-1878
pISSN - 0265-9247
DOI - 10.1002/bies.20182
Subject(s) - lamprey , vertebrate , biology , extant taxon , evolutionary biology , evolutionary developmental biology , evolution of mammals , zebrafish , anatomy , gene , genetics , paleontology
The jaw is one of the earliest innovations in vertebrate history. Several recent findings suggest a scenario for jaw evolution as a progression of changes in pharyngeal developmental mechanisms. The lamprey, an extant jawless vertebrate, constitutes a model for the pre‐gnathostome ancestry. Comparing expression patterns of regulatory genes between the gnathostome and lamprey embryos may enable us to get a glimpse of the essential changes that were responsible for the evolution of the jaw. We hypothesize that a specific topographical change of inductive tissue interactions to be described here brought about the jaw as an evolutionary novelty. BioEssays 27:331–338, 2005. © 2005 Wiley Periodicals, Inc.