Paracomatula triadicasp. nov. — an early comatulid crinoid from the Otapirian (Late Triassic) of New Caledonia
- 1 January 1993
- journal article
- research article
- Published by Taylor & Francis in Alcheringa: An Australasian Journal of Palaeontology
- Vol. 17 (1) , 1-17
- https://doi.org/10.1080/03115519308619484
Abstract
Paracomatula triadica sp. 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. Paracomatula triadica sp. nov. aus der obertriadischen Bouraké Formation (Otapirium, Obernor) von Neukaledonien ist der älteste bekannte Haarstern. Seine ursprünglichen Merkmale (kurze Arme mit einer einzigen, isotomen Teilung, lange zylindrische Zirren- und lange Armglieder) legen nahe, daß die Paracomatuliden eher obertriadische Abkömmlinge der Holocriniden als der hochspezialisierten Pentacrinitiden sind. Paracomatuliden erscheinen erstmalig nach dem mittelkarnischen Faunenschnitt. Ihre eleutherozoische Lebensweise führte zur erfolgreichsten Strategie der modernen artikulaten Seelilien.Keywords
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