By Stefan Koenemann, Ronald Jenner
In comparison to different arthropods, crustaceans are characterised via an exceptional disparity of physique plans. commonly, the specialization of arthropod segments and appendages into precise physique areas has served as a handy foundation for larger class; despite the fact that, many relationships in the phylum Arthropoda nonetheless stay arguable. Can Crustacea also be thought of a monophyletic staff? if that is so, then that are their closest family members in the Arthropoda? The solutions to questions comparable to those will play a key position in knowing styles and procedures in arthropod evolution, together with the disappearance of sure physique plans from the fossil list, in addition to incidences of transition from aquatic to terrestrial environments. Crustacea and Arthropod Relationships, written through a crew of the world over well-known specialists, offers a large choice of viewpoints, whereas providing an updated precis of contemporary growth throughout a number of disciplines. With wealthy element and vibrancy, it addresses the evolution and phylogenetic relationships of the Arthropoda established upon molecular, developmental, morphological, and paleontological facts. quantity sixteen is the 1st within the sequence not to be solely devoted to discussions particular to crustaceans. whereas it truly is nonetheless crustaceo-centric, the concentration of this quantity has been prolonged to incorporate different teams of arthropods besides the Crustacea. This wider concentration bargains demanding possibilities to guage higher-level relationships in the Arthropoda from a carcinologic point of view. This quantity is devoted to the profession of Frederick R. Schram, the founding editor of CrustaceanIssues in 1983, in reputation of his many stimulating and wide-ranging contributions to the evolutionary biology of arthropods generally, and of crustaceans specifically.
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Extra resources for Crustacea and Arthropod Relationships
8: 317-586. Beurlen, K. 1958. Contribução a paleontologia do Estado do Pará, Crostaceos decápodos da Formação Pirabas. Bol. Mus. Par. S. ), 5: 2-48. A. 1976. Ekalakia lamberti n. , n. sp. (Crustacea, Decapoda) from the Upper Cretaceous Pierre Shale of eastern Montana. J. Paleontol. 50: 398-401. A. 1978. Two new crabs, Sodakus tatankayotankaensis n. , n. sp. and Raninella oaheensis n. sp. (Crustacea, Decapoda), from the Upper Cretaceous Pierre Shale of South Dakota. J. Paleontol. 52: 608-617. A.
Hallam & Wignall (1997) considered that several of these, probably operating together, could have been sufficient to cause a Late Cretaceous mass extinction even without invoking a large impact event. 5 CONCLUSIONS The very high survival rate of decapod families across the K/P boundary suggests that many of the extinctions within the Decapoda were in fact pseudoextinctions. Very few lineages within the Decapoda at the family level (only 8, or 21%) were lost during the Late Cretaceous, and only three were known from the Maastrichtian, temporally proximal to the proposed K/P boundary event(s).
1985. Fossil decapod crustaceans from the Gammon Ferruginous Member, Pierre Shale (early Campanian), Black Hills, South Dakota. J. Paleontol. 59: 605-624. A. 1986. A. Proc. Biol. Soc. Wash. 99: 604-611. A. 1988a. Two crabs, Xandaros sternbergi (Rathbun, 1926) n. , and Icriocarcinus xestos n. , n. , from the Late Cretaceous of San Diego County, California, USA, and Baja California Norte, Mexico. Trans. San Diego Soc. Nat. Hist. 21: 245-257. A. 1988b. A new crab, Seorsus wadei, from the Late Cretaceous Coon Creek Formation, Union County, Mississippi.
Crustacea and Arthropod Relationships by Stefan Koenemann, Ronald Jenner