The Ordovician caryocaridid phyllocarids (Crustacea): diversity and evolutionary tendencies

被引:9
作者
Racheboeuf, Patrick R. [1 ]
Crasquin, Sylvie [2 ]
机构
[1] Univ Bretagne Occidentale, Univ Europeenne Bretagne, CNRS Domaines Ocean, UFR Sci & Tech,UMR 6538, F-29285 Brest 3, France
[2] Univ Paris 06, CNRS, CNRS Paleobiodivers & Paleoenvironm, Lab Micropaleontol,UMR 5143, F-75252 Paris, France
来源
NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN | 2010年 / 257卷 / 02期
关键词
Caryocaridid Phyllocarida; Malacostraca; biodiversity; biostratigraphy; evolution;
D O I
10.1127/0077-7749/2010/0075
中图分类号
Q91 [古生物学];
学科分类号
0709 ; 070903 ;
摘要
An overall look at the Ordovician phyllocarid representatives assigned to the Family Caryocarididae led to the recognition of an unexpected biodiversity during the Tremadocian Hirnantian time interval. Three new genera are described: Jellicaris n.g. from Australia, Saltericaris n.g. from Bohemia, and Soomicaris n.g. from South Africa, which add to the three previously described taxa, namely Caryocaris, Janviericaris, and Ivocaris; hence the Family Caryocarididae now includes six genera. The stratigraphical range of these genera, with respect to the graptolite zonation, displays that morphological characters vary accordingly, which is considered to reflect evolutionary tendencies which are exposed and discussed herein. Hypothetical phyletic relationships between caryocaridid genera are briefly discussed and are suggestive of two parallel lineages within the Family Caryopcarididac.
引用
收藏
页码:237 / 248
页数:12
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