Paracomatula triadicasp. nov. — an early comatulid crinoid from the Otapirian (Late Triassic) of New Caledonia
作者:
Hans Hagdorn,
HamishJ. Campbell,
期刊:
Alcheringa: An Australasian Journal of Palaeontology
(Taylor Available online 1993)
卷期:
Volume 17,
issue 1
页码: 1-17
ISSN:0311-5518
年代: 1993
DOI:10.1080/03115519308619484
出版商: Taylor & Francis Group
关键词: Crinoids;Comatulidina;Paracomatulidae;Paracomatula triadica;Otapirian;Norian;Late Triassic;New Caledonia;Bouraké Formation;biostratigraphy;phylogeny
数据来源: Taylor
摘要:
Paracomatula triadicasp. nov. from the Late Triassic (Otapirian, upper Norian) Bouraké Formation of New Caledonia is the earliest known feather star. Its primitive characters (short arms, branching only once isotomously, long cylindrical cirrals and tall brachials) suggest that the paracomatulids are a Late Triassic offshoot of the holocrinids rather than the more specialized pentacrinitids. The paracomatulids appear for the first time after the mid Carnian extinction. Their eleutherozoic life style was to become the most successful strategy among modern articulate crinoids.
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