Zootaxa: a Genus Level Revision of the Thamnocephalidae (Crustacea

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Zootaxa: a Genus Level Revision of the Thamnocephalidae (Crustacea

Zootaxa 1260: 1–25 (2006) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 1260 Copyright © 2006 Magnolia Press ISSN 1175-5334 (online edition) A genus level revision of the Thamnocephalidae (Crustacea: Branchiopoda: Anostraca) D. CHRISTOPHER ROGERS EcoAnalysts, Inc. 166 Buckeye Street, Woodland, CA 95695 USA. Abstract The family Thamnocephalidae, especially the genus Branchinella, has become a mélange of genera and species with unclear affinities. A genus level revision of the family, using modern taxonomic standards, is presented. Two distinct subfamilies are recognized, consisting of six genera (including one new genus): Thamnocephalus and Carinophallus gen. nov. in the Thamnocephalinae, and; Dendrocephalus, Phallocryptus, Gurneya, and Branchinella in the Branchinellinae. Three genera are each composed of two subgenera: Thamnocephalus (Thamnocephalus and Simplicephalus), Dendrocephalus (Dendrocephalus and Dendrocephalinus subgen. nov.), and Branchinella (Branchinella and Branchinellites stat. nov.). A key to the genera is presented coupled with a checklist of all described species in the family, and Branchinella hardingi is redescribed from presumed paratype material. Key words: Branchinella, Branchinellites, Carinophallus, Dendrocephalinus, Dendrocephalus, Gurneya, Phallocryptus, Thamnocephalus, fairy shrimp, new genus, new subgenus Introduction As previously noted (Linder 1941; Hamer 1994; Brtek 1996; Brendonck 1997; Brendonck & Belk 1997; Rogers 2003), the genus Branchinella Sayce, 1903 has long been a dumping ground for thamnocephalid anostracans that did not readily fit into the genera Thamnocephalus Packard 1879, Dendrocephalus Daday 1908, and Phallocryptus Birabén 1951. The resulting confusion has necessitated a close reassessment of the family. In 1879 Packard established the genus Thamnocephalus, and later in 1883 he erected the subfamily Thamnocephalinae within the Branchipodidae to accommodate his new genus and species. Simon (1886) elevated this subfamily to family level. Daday (1910 a, b) recognized similarities among the genera Thamnocephalus, Dendrocephalus, Branchinella, Branchinellites Daday, 1910, and Eubranchinella Brauer 1877, and placed Accepted by J. Olesen: 12 Jun 2006; published: 14 Jul. 2006 1.

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Fig. Ap. 2.1. Denton Tending His Fairy Shrimp Collection
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