By Stefan Koenemann, Ronald Jenner
In comparison to different arthropods, crustaceans are characterised by way of an exceptional disparity of physique plans. routinely, the specialization of arthropod segments and appendages into unique physique areas has served as a handy foundation for better category; despite the fact that, many relationships in the phylum Arthropoda nonetheless stay debatable. Can Crustacea also be thought of a monophyletic workforce? if this is the case, then that are their closest relations in the Arthropoda? The solutions to questions akin to those will play a key function in knowing styles and tactics in arthropod evolution, together with the disappearance of convinced physique plans from the fossil list, in addition to incidences of transition from aquatic to terrestrial environments. Crustacea and Arthropod Relationships, written via a crew of the world over famous specialists, provides a large choice of viewpoints, whereas delivering an updated precis of modern growth throughout a number of disciplines. With wealthy aspect and vibrancy, it addresses the evolution and phylogenetic relationships of the Arthropoda established upon molecular, developmental, morphological, and paleontological proof. quantity sixteen is the 1st within the sequence not to be completely devoted to discussions particular to crustaceans. whereas it's nonetheless crustaceo-centric, the concentration of this quantity has been prolonged to incorporate different teams of arthropods in addition to the Crustacea. This wider concentration bargains not easy possibilities to guage higher-level relationships in the Arthropoda from a carcinologic viewpoint. This quantity is devoted to the occupation of Frederick R. Schram, the founding editor of CrustaceanIssues in 1983, in acceptance of his many stimulating and wide-ranging contributions to the evolutionary biology of arthropods quite often, and of crustaceans particularly.
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Extra resources for Crustacea and Arthropod Relationships
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9: 529-532. H. 1997. Fossil Homolidae (Crustacea; Decapoda). Bull. Mizunami Fossil Mus. 24: 5171. H. L. 1994. A synopsis of the biostratigraphic distribution of the crab genera (Crustacea, Decapoda) of the Danian (Palaeocene) of Denmark and Sweden. Bull. Mizunami Fossil Mus. 21: 35-46. H. F. 1975. A new crab, Costacopluma concava, from the Upper Cretaceous of Nigeria. Palaeonology 18: 823-829. H. & Smith, R. 1992. Ypresian (Lower Eocene) crabs (Decapoda, Crustacea) from Belgium. Bull. Inst. R. Sci.
Some genera may have arisen directly in the wake of the K/P extinction due to selective pressures resulting from a stressed environment, but because we lack fine-scale temporal control on fossil occurrences, this is difficult or impossible to ascertain. In addition, many Eocene records are known, but some of those genera may have originated in the Palaeocene or even the Late Cretaceous. As more Palaeocene decapods are being recovered and described, the geologic range of genera and families previously known only from Eocene or younger rocks is being extended into the Palaeocene (for example, the Panopeidae, in Karasawa & Schweitzer, 2004).