Ancestor–descendant relationships in evolution: origin of the extant pygmy right whale, Caperea marginata

Ancestor–descendant relationships (ADRs), involving descent with modification, are the fundamental concept in evolution, but are usually difficult to recognize. We examined the cladistic relationship between the only reported fossil pygmy right whale, †Miocaperea pulchra, and its sole living relativ...

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Veröffentlicht in:	Biology letters (2005) 2015-01, Vol.11 (1), p.20140875-20140875
Hauptverfasser:	Tsai, Cheng-Hsiu, Fordyce, R. Ewan
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals Biological Evolution Caperea marginata Cetacea Evolutionary Biology Fossils Mysticeti Ontogenetic Clade Phylogenetic Methods Phylogeny Punctuated Equilibrium Whales - anatomy & histology Whales - classification
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creator	Tsai, Cheng-Hsiu Fordyce, R. Ewan
description	Ancestor–descendant relationships (ADRs), involving descent with modification, are the fundamental concept in evolution, but are usually difficult to recognize. We examined the cladistic relationship between the only reported fossil pygmy right whale, †Miocaperea pulchra, and its sole living relative, the enigmatic pygmy right whale Caperea marginata, the latter represented by both adult and juvenile specimens. †Miocaperea is phylogenetically bracketed between juvenile and adult Caperea marginata in morphologically based analyses, thus suggesting a possible ADR—the first so far identified within baleen whales (Cetacea: Mysticeti). The †Miocaperea–Caperea lineage may show long-term morphological stasis and, in turn, punctuated equilibrium.
doi_str_mv	10.1098/rsbl.2014.0875
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Lett</stitle><addtitle>Biol Lett</addtitle><date>2015-01-01</date><risdate>2015</risdate><volume>11</volume><issue>1</issue><spage>20140875</spage><epage>20140875</epage><pages>20140875-20140875</pages><issn>1744-9561</issn><eissn>1744-957X</eissn><abstract>Ancestor–descendant relationships (ADRs), involving descent with modification, are the fundamental concept in evolution, but are usually difficult to recognize. We examined the cladistic relationship between the only reported fossil pygmy right whale, †Miocaperea pulchra, and its sole living relative, the enigmatic pygmy right whale Caperea marginata, the latter represented by both adult and juvenile specimens. †Miocaperea is phylogenetically bracketed between juvenile and adult Caperea marginata in morphologically based analyses, thus suggesting a possible ADR—the first so far identified within baleen whales (Cetacea: Mysticeti). 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subjects	Animals Biological Evolution Caperea marginata Cetacea Evolutionary Biology Fossils Mysticeti Ontogenetic Clade Phylogenetic Methods Phylogeny Punctuated Equilibrium Whales - anatomy & histology Whales - classification
title	Ancestor–descendant relationships in evolution: origin of the extant pygmy right whale, Caperea marginata
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