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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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