The Developmental Origins of Mosaic Evolution in the Primate Limb Skeleton

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The central hypothesis of this paper is that basic properties of vertebrate limb development bias the generation of phenotypic variation in certain directions, and that these biases establish focal units, or regions, of evolutionary change within the primate hand and foot. These focal units include (1) a preaxial domain (digit I, hallux or pollex, metapodial and proximal phalanx), (2) a postaxial domain (metapodials and phalanges of digits II-V), and (3) a digit tip domain (terminal phalanges and nails/claws of rays I-V). The existence of these focal units therefore provides a mechanistic basis for mosaic evolution within the hand and foot, and can be applied to make specific predictions about which features of the limb skeleton are most likely to be altered in primate adaptive radiations over time. Examination of the early primate fossil record provides support for this model, and suggests that the existence of variational tendencies in limb development has played a major role in guiding the origin and evolution of primate skeletal form.

Original languageEnglish (US)
Pages (from-to)447-455
Number of pages9
JournalEvolutionary Biology
Volume39
Issue number4
DOIs
StatePublished - Jan 1 2012

Fingerprint

limbs (animal)
primate
skeleton
limb
phalanges
Primates
hands
nails (integument)
adaptive radiation
claws
fossil record
phenotypic variation
vertebrate
fossils
vertebrates
prediction
mosaic

Keywords

  • Autopod
  • Digits
  • Euarchonta
  • Euprimates
  • Evolvability

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

The Developmental Origins of Mosaic Evolution in the Primate Limb Skeleton. / Hamrick, Mark W.

In: Evolutionary Biology, Vol. 39, No. 4, 01.01.2012, p. 447-455.

Research output: Contribution to journalArticle

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