By Stefan Koenemann, Ronald Jenner
In comparison to different arthropods, crustaceans are characterised by way of an exceptional disparity of physique plans. ordinarily, the specialization of arthropod segments and appendages into unique physique areas has served as a handy foundation for better type; besides the fact that, many relationships in the phylum Arthropoda nonetheless stay debatable. Can Crustacea also be thought of a monophyletic staff? if this is the case, then that are their closest family members in the Arthropoda? The solutions to questions reminiscent of those will play a key position in realizing styles and approaches in arthropod evolution, together with the disappearance of yes physique plans from the fossil checklist, in addition to incidences of transition from aquatic to terrestrial environments. Crustacea and Arthropod Relationships, written by way of a workforce of across the world famous specialists, offers a large choice of viewpoints, whereas providing an updated precis of modern growth throughout numerous disciplines. With wealthy element and vibrancy, it addresses the evolution and phylogenetic relationships of the Arthropoda dependent 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's 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 occupation 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 quite often, and of crustaceans particularly.
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Extra resources for Crustacea and Arthropod Relationships
Within the Galatheidae, eleven genera are known from Cretaceous or earlier rocks. Only a few of these survived into the Late Cretaceous. The two genera that are known from the Upper Cretaceous crossed the boundary, and three new genera appeared in the Palaeocene (Appendix 1, Table 5). Ultimately, the family experienced a major radiation in the postCretaceous, exhibited robust records in the Eocene and later records, and is well represented in the modern oceans. Within the Raninidae, seven genera have confirmed records in Cretaceous rocks.
1984. Sedimentology and ichnology of the Cretaceous-Tertiary boundary in Denmark: implications for the causes of the terminal Cretaceous extinction. J. Sedim. Petrol. 54: 681-703. Fabiani, R. 1910. I crostacei terziarii del Vicentino. Boll. Mus. civ. Vicenza 1: 1-40. C. 1793. Entomologiae Systematica Emendata et Aucta, Secundum Classes, Ordines, Genera, Species, Adjectis Synonimis, Locis, Observationibus, Descriptionibus: 519 pp. G. Proft et Storch. C. 1798. Supplementum Entomologiae Systematicae: 572 pp.
Typically, resolution to the level of stage is as precise as is possible, and it would be unrealistic to assign absolute age values to events as is done with mollusks (Harries 1999; Stilwell 2003). The macruran and anomuran decapods exhibit relatively high levels of survivorship of genera across the boundary (Appendix 1, Tables 4, 5). The Penaeidae (1 surviving genus), Glypheidae (2 surviving genera), Erymidae (1), Nephropidae (3), Callianassidae (3), Palinuridae (1), Ctenochelidae (1), Upogebiidae (1), and Galatheidae (3) all embrace genera that survived across the boundary.