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Bryozoa: The Miocene to Recent family Petalostegidae. Systematics, affinities, biogeography
Gordon, D.P.; d'Hondt, J.-L. (1991). Bryozoa: The Miocene to Recent family Petalostegidae. Systematics, affinities, biogeography, in: Crosnier, A. Résultats des Campagnes MUSORSTOM 8. Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie, 151: pp. 91-123
In: Crosnier, A. (Ed.) (1991). Résultats des Campagnes MUSORSTOM 8. Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie, 151. Editions du Muséum: Paris. ISBN 2-85653-186-5. 466 pp., more
In: Mémoires du Muséum national d'Histoire naturelle. Série A, Zoologie. Editions du Muséum: Paris. ISSN 0078-9747, more
Peer reviewed article  
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Keywords
    Taxa > Species > New taxa > New species
    Petalostegidae Gordon, 1984 [WoRMS]
    ISEW, New Caledonia [Marine Regions]
    Marine/Coastal
Authors  Top 
  • Gordon, D.P.
  • d'Hondt, J.-L., more
Abstract
    Knowledge of the little-known cheilostome bryozoan family Petalostegidae has hitherto been based on only two extant species (Petalostegus bicornis (Busk) and P. spinosus Powell), and an Australian Miocene species (P. tenuis (Maplestone)). Previously, these have been included among the anascan superfamily Buguloidea. With the discovery of a remarkably diverse petalostegid fauna in New Caledonian waters (especially on the northern Norfolk Ridge), it is apparent that the family is neither "anascan" nor monogeneric. The obscure monotypic Australian Miocene genus Chelidozoum Stach is now recognised as petalostegid, based on the discovery of four, new, Recent species (including one from off Victoria). Among these species there is a reduction in the size of the costal field from five spines, through three, to two. The known species of Petalostegus Levinsen are redescribed and four new species are described (including one from the New Zealand deep sea). The family, which is entirely southern-hemisphere in distribution, is now included in the ascophorine superfamily Catenicelloidea. Evidence of predation on embryos is seen from boreholes in ovicells of two species of Petalostegus.
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