Analyse cladistique et Trilobites: un point de vue
作者:
JEAN‐LOUIS HENRY,
期刊:
Lethaia
(WILEY Available online 1984)
卷期:
Volume 17,
issue 1
页码: 61-66
ISSN:0024-1164
年代: 1984
DOI:10.1111/j.1502-3931.1984.tb00667.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
On the basis of precise trilobite examples, the difficulties and interest in cladistic analysis are emphasized. The problem of distinguishing plesiomorphic and apomorphic characters is exemplified inMorgatiawith reference to auxiliary impressions of the glabella and vincular furrows. InCrozonaspis, cladograms by themselves do not clarify the distinction of primitive versus derived features; the stratigraphical distribution of species, although not conclusive, is helpful in clarifying relationships. Although stratigraphical data are essential for reconstructing species lineages, they may be misleading when dealing with taxa above the species level. For all phylogenetical reconstructions, the completeness of the palaeontological and biogeographical record must be taken into consideration. DTrilobita, Phacopida, cladistics, Ordovician.
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