Article (Scientific journals)
New observations on some Upper Devonian brachiopods from the Namur-Dinant Basin (Belgium)
Mottequin, Bernard
2008In Geodiversitas, 30, p. 455-513
Peer reviewed
 

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Keywords :
Brachiopoda; Productida; Orthida; Athyridida; Spiriferida; Spiriferinida; Mid- to Late Frasnian; Early Famennian; Namur-Dinant Basin; Belgium
Abstract :
[en] Brachiopods (Productida [except Chonetidina], Orthida, Athyridida, Spiriferida [Adolfiidae, Reticulariidae, Ambocoeliidae, Thomasariidae], and Spiriferinida) recovered in the interval, in terms of the standard conodont zonation, between the Palmatolepis hassi and P. triangularis zones (Late Middle Frasnian to Early Famennian) in the Namur-Dinant Basin (Belgium) are described. The orders and suborders investigated include 32 species: 21 are described in open nomenclature, seven are previously known, four are new of which three are assigned to previously known genera: Aulacella aggeris n. sp., Dicamara plutonis n. sp., and Warrenella (Warrenella) aquaealbae n. sp. Th e fourth species belonging to a newly defined genus: Neptunathyris buxi n. gen., n. sp. A major brachiopod faunal change occurs at the top of the P. rhenana Zone in southern Belgium, with the disappearance of most existing species in parallel with the deterioration of the oxygenation conditions preceding the Upper Kelwasser Event. Only an impoverished fauna (Lingulida, Chonetidina, Rhynchonellida) has been collected in the P. linguiformis Zone. The recovery of the Famennian brachiopods after the end-Frasnian biotic crisis was rapid in the basal Famennian but, despite their great abundance, their diversity was relatively low. New cosmopolitan genera appeared at this time especially among the rhynchonellids, athyridids and spiriferids with new species of pre-existing orthid and orthotetid genera.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Mottequin, Bernard ;  Université de Liège - ULiège > Département de géologie > Paléontologie animale et humaine
Language :
English
Title :
New observations on some Upper Devonian brachiopods from the Namur-Dinant Basin (Belgium)
Publication date :
2008
Journal title :
Geodiversitas
ISSN :
1280-9659
eISSN :
1638-9395
Publisher :
Muséum national d'Histoire naturelle, Paris, France
Volume :
30
Pages :
455-513
Peer reviewed :
Peer reviewed
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since 26 November 2008

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