Zootaxa, Streptocephalus (Crustacea: Branchiopoda: Anostraca)

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Zootaxa, Streptocephalus (Crustacea: Branchiopoda: Anostraca)

Zootaxa 1049: 33–48 (2005) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 1049 Copyright © 2005 Magnolia Press ISSN 1175-5334 (online edition) Updated diagnoses for the Indian species of Streptocephalus (Crustacea: Branchiopoda: Anostraca) CHINAVENMENI S VELU* & NATESAN MUNUSWAMY Department of Zoology, University of Madras, Guindy Campus, Chennai 600 025. INDIA. * School of Pharmacy, Department of Pharmaceutical Sciences, 1400 Wallace Blvd (#228), Amarillo, Texas 79106. USA. Email : [email protected]; [email protected] Abstract The taxonomic status of the Indian Streptocephalus (S. dichotomus, S. echinus, S. longimanus S. spinifer, and S. simplex) is reevaluated and updated with additional information on various features such as penes, cercopods, and cysts. Surface ornamentation of the cysts is species-specific and therefore useful in identification. Key words: Streptocephalus dichotomus, S. echinus, S. simplex, S. longimanus, S. spinifer, cyst morphology Introduction The Anostracan fauna is widespread and an important component of freshwater ecosystem. The monogeneric family Streptocephalidae Daday de dees, 1910 contains the genus Streptocephalus Baird, 1852, with 63 species distributed throughout Africa, North America, southern Eurasia, and Australia (Belk & Brtek 1995, 1997; Sanoamuang et al. 2000; Herbert & Timms 2000; Timms 2004). Streptocephalus species are defined by the morphology of the male second antennae and frontal appendage (Maeda-Martinez et al. 1995a, b). Various authors have reviewed the Streptocephalus of the Americas (Baird 1852; Daday 1908; Creaser 1930; Linder 1941; Moore 1966; Maeda-Martinez 1995a) and Africa (Brendonck & Coomans 1994; Hamer et al. 1994a, b), and cursory reviews of the species of the world are available (Maeda-Martinez, et al. 1995b; Belk & Brtek 1995, 1997). In contrast the Anostraca of the Indian Empire have received sporadic attention (Alcock 1897; Sars 1900; Gurney 1907, 1931; Daday 1910; Bond 1934; Battish 1992; Belk & E Accepted by J. Olesen: 2 Sept. 2005; published: 13 Sept. 2005 33.

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Phylogenetic Analysis of Anostracans (Branchiopoda: Anostraca) Inferred from Nuclear 18S Ribosomal DNA (18S Rdna) Sequences
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