Crustacea and Arthropod Relationships by Stefan Koenemann, Ronald Jenner
By Stefan Koenemann, Ronald Jenner
In comparison to different arthropods, crustaceans are characterised via an exceptional disparity of physique plans. generally, the specialization of arthropod segments and appendages into special physique areas has served as a handy foundation for larger category; despite the fact that, many relationships in the phylum Arthropoda nonetheless stay arguable. Can Crustacea also be thought of a monophyletic team? 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 function in knowing styles and techniques in arthropod evolution, together with the disappearance of convinced physique plans from the fossil checklist, in addition to incidences of transition from aquatic to terrestrial environments. Crustacea and Arthropod Relationships, written via a workforce of across the world famous specialists, offers a large choice of viewpoints, whereas providing an up to date precis of contemporary development throughout a number of disciplines. With wealthy aspect and vibrancy, it addresses the evolution and phylogenetic relationships of the Arthropoda dependent upon molecular, developmental, morphological, and paleontological proof. 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 not easy possibilities to guage higher-level relationships in the Arthropoda from a carcinologic standpoint. This quantity is devoted to the profession 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 normally, and of crustaceans specifically.
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Extra resources for Crustacea and Arthropod Relationships
A similar pattern is seen among Eocene decapods of the North Pacific Ocean (Schweitzer 2001). Many unusual forms are known from the Eocene of Italy and Hungary (Müller & Collins 1991; De Angeli & Beschin 2001; Beschin et al. 2002; Beschin & De Angeli 2003; Busulini et al. 2003) that are difficult to place within a family and that do not seem to have closely related descendants. The rate of origination of decapod taxa during the Eocene is the same as that seen for the Late Cretaceous in the Central Americas and in both time intervals is the same as the rate of extinction (Schweitzer et al.
Ple. MICHELEIDAE Paki CALLIANASSIDAE Calliax Neocallichirus Protocallianassa Callichirus CTENOCHELIDAE Ctenocheles Callianopsis CHIROSTYLIDAE Pristinaspina Eumunida UPOGEBIIDAE Upogebia GALATHEIDAE Munitheites Palaeomunidopsis Gastrosacus Mesogalathea Paragalathea Palaeomunida Eomunidopsis Galathea Brazilomunida Luisogalathea Munidopsis Protomunida Munida Faxegalathea Acanthogalathea Lessinigalathea Spathogalathea AEGLIDAE Protaegla Haumuriaegla RETRORSICHELIDAE Retrorsichela DYNOMENIDAE Cyphonotus Cyclothyreus Decapod crustaceans, the K/P event, and Palaeocene recovery 33 Triassic Jurassic Cretaceous Palaeogene Neogene Early Late Pal.
2003 Lower Cretaceous-Oligocene Palaeoxanthopsidae Schweitzer, 2003 Upper Cretaceous-Eocene Table 3. Families becoming extinct by the end-Cretaceous. Data records and abbreviations as defined in Table 1. , 1993 Upper Cretaceous HSL Decapod crustaceans, the K/P event, and Palaeocene recovery 31 Table 4. Geologic range of families and genera that appeared during or before the Cretaceous (all within the data set as defined in the text). Ranges are included for all genera within families crossing the K/P boundary as well as ranges for all relevant genera within the families we have recently revised.