Mammalian evolution. Evolutionary development in basal mammaliaforms as revealed by a docodontan.
Science
; 347(6223): 760-4, 2015 Feb 13.
Article
en En
| MEDLINE
| ID: mdl-25678660
ABSTRACT
A new Late Jurassic docodontan shows specializations for a subterranean lifestyle. It is similar to extant subterranean golden moles in having reduced digit segments as compared to the ancestral phalangeal pattern of mammaliaforms and extant mammals. The reduction of digit segments can occur in mammals by fusion of the proximal and intermediate phalangeal precursors, a developmental process for which a gene and signaling network have been characterized in mouse and human. Docodontans show a positional shift of thoracolumbar ribs, a developmental variation that is controlled by Hox9 and Myf5 genes in extant mammals. We argue that these morphogenetic mechanisms of modern mammals were operating before the rise of modern mammals, driving the morphological disparity in the earliest mammaliaform diversification.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Falanges de los Dedos de la Mano
/
Evolución Biológica
/
Mamíferos
/
Morfogénesis
Límite:
Animals
/
Humans
País/Región como asunto:
Asia
Idioma:
En
Revista:
Science
Año:
2015
Tipo del documento:
Article