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Volumn 317, Issue 5837, 2007, Pages 499-502

A cambrian peak in morphological variation within trilobite species

Author keywords

[No Author keywords available]

Indexed keywords

BIOSTRATIGRAPHY; CAMBRIAN; EVOLUTION; INTRASPECIFIC VARIATION; MORPHOLOGY; PHYLOGENETICS; POLYMORPHISM; TRILOBITE;

EID: 34547602608     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1142964     Document Type: Article
Times cited : (89)

References (35)
  • 12
    • 34547602723 scopus 로고    scopus 로고
    • D. E. G. Briggs, Ed, Peabody Museum of Natural History, Yale Univ, New Haven, CT
    • N. C. Hughes, in Evolving Form and Function: Fossils and Development, D. E. G. Briggs, Ed. (Peabody Museum of Natural History, Yale Univ., New Haven, CT, 2005), pp. 139-158.
    • (2005) Evolving Form and Function: Fossils and Development , pp. 139-158
    • Hughes, N.C.1
  • 14
    • 0004430638 scopus 로고
    • K. J. McNamara, Ed, Belhaven, London
    • R. A. Fortey, R. M. Owens, in Evolutionary Trends, K. J. McNamara, Ed. (Belhaven, London, 1990), pp. 121-142.
    • (1990) Evolutionary Trends , pp. 121-142
    • Fortey, R.A.1    Owens, R.M.2
  • 17
    • 34547598619 scopus 로고    scopus 로고
    • Materials and methods are available as supporting material on Science Online.
    • Materials and methods are available as supporting material on Science Online.
  • 20
    • 84869108997 scopus 로고    scopus 로고
    • T. J. Cotton, R. A. Fortey, in Crustocea and Arthropod Relationships, S. Koenemann, R. A. Jenner, Eds., 16 of Crustacean Issues (Taylor & Francis, Boca Raton, FL, 2005), pp. 95-136.
    • T. J. Cotton, R. A. Fortey, in Crustocea and Arthropod Relationships, S. Koenemann, R. A. Jenner, Eds., vol. 16 of Crustacean Issues (Taylor & Francis, Boca Raton, FL, 2005), pp. 95-136.
  • 22
    • 34547589530 scopus 로고    scopus 로고
    • Extremely poor taxonomic representation may bias estimates of Late Cambrian intraspecific variation. Ptychopariid clades underwent a series of pronounced radiations during the Late Cambrian and accounted for most of the trilobite diversity at this time, but are grossly undersampled in the present study only eight species represented
    • Extremely poor taxonomic representation may bias estimates of Late Cambrian intraspecific variation. Ptychopariid clades underwent a series of pronounced radiations during the Late Cambrian and accounted for most of the trilobite diversity at this time, but are grossly undersampled in the present study (only eight species represented).
  • 33
    • 34547582388 scopus 로고    scopus 로고
    • Developmental regulation controlling morphogenesis of the features coded in cladistic analyses of trilobites must have lain downstream of the hypothesized kernels of gene-regulatory networks specifying body-plan architecture (32, Complex, phylum-defining characters are not seen to vary within species, and their long-term stability renders consideration of their evolution as population polymorphisms writ large inappropriate 31, The decline in intraspecific variation documented here is therefore unlikely to simply extrapolate into an explanation for the uniqueness of the Cambrian radiation of metazoans
    • Developmental regulation controlling morphogenesis of the features coded in cladistic analyses of trilobites must have lain downstream of the hypothesized kernels of gene-regulatory networks specifying body-plan architecture (32). Complex, phylum-defining characters are not seen to vary within species, and their long-term stability renders consideration of their evolution as "population polymorphisms writ large" inappropriate (31). The decline in intraspecific variation documented here is therefore unlikely to simply extrapolate into an explanation for the uniqueness of the Cambrian radiation of metazoans.
  • 35
    • 34547602118 scopus 로고    scopus 로고
    • R. Fortey, T. Cotton, S. Westrop, J. Adrain, and G. Edgecombe discussed aspects of character coding and taxonomic sampling in their cladistic analyses. A. R. Palmer assisted in determining the stratigraphic provenance of several species. Comments from D. Jablonski, M. Foote, P. Wagner, P. Crane, B. Sinclair, and two reviewers helped improve the analysis and manuscript. L. Qin translated Chinese literature. Fig. 51 was drafted by M. Foote.
    • R. Fortey, T. Cotton, S. Westrop, J. Adrain, and G. Edgecombe discussed aspects of character coding and taxonomic sampling in their cladistic analyses. A. R. Palmer assisted in determining the stratigraphic provenance of several species. Comments from D. Jablonski, M. Foote, P. Wagner, P. Crane, B. Sinclair, and two reviewers helped improve the analysis and manuscript. L. Qin translated Chinese literature. Fig. 51 was drafted by M. Foote.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.