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PROC. ENTOMOL. SOC. WASH. 109(2), 2007, pp. 469-488 SYSTEMATICS OF A NEW GENUS AND CAVERNICOLOUS SPECIES OF THE MOSQUITO TRIBE AEDINI (DIPTERA: CULICIDAE) FROM THAILAND Ralph E. Harbach, Rampa Rattan arithikul, Theresa M. Howard, Yvonne-Marie Linton, and Ian J. Kitching (REH, TMH, YML, UK) Department of Entomology, The Natural History Museum, Cromwell Road, London SW7 5BD, U.K. (e-mail: [email protected]); (RR) Museum of World Insects, 72 Nimanhemin 13, Huay-Kaeo Road, Chiangmai 50200, Thailand Abstract. — Borichinda Harbach and Rattanarithikul, n. gen., is introduced as a new mosquito genus of tribe Aedini for a previously unknown cave-dwelling species, Borichinda cavernicola Rattanarithikul and Harbach, n. sp., in Thailand. A diagnosis of the genus is provided that features unique anatomical characters of the adult, pupal, and larval stages of the type species. The affinities of Borichinda and Be. cavernicola are discussed in terms of their position in the phylogeny of Aedini. The male and female genitalia, pupa, fourth-instar larva, and terminal abdominal segments of the third-instar larva of the new species are illustrated. Sequence data are provided for the second nuclear internal spacer region (ITS2) and a 522-bp fragment of the mitochondrial cytochrome c oxidase I (CGI) gene. Cladistic analysis of morphological data indicates that Borichinda is more closely related to Isoaedes and Ayurakitia than to other genera of tribe Aedini. Salient differences that distinguish these three genera are contrasted. Key Words: new genus, new species, ITS2, CGI, mosquito, taxonomy, systematics Larvae of the new species described in phyletic line of tribe Aedini. Consequent-this paper were discovered in a cave ly, character data for the new species while sampling a wide range of larval were coded for the characters described mosquito habitats in Doi Inthanon by Reinert et al. (2004) and the combined National Park in Chiangmai Province data set analyzed to objectively assess the of northern Thailand. Adults reared placement of the new species in the from the larvae were initially identified classification of the tribe. The results of as a species of genus Isoaedes (sensu this analysis indicate that the species Reinert et al. 2004) using unpublished does not fall within any currently recog-keys (Rattanarithikul et al.) for the nized genus-level taxon of Aedini, and aedine fauna of Thailand. Upon closer therefore a new genus-species combina-examination of the adults and their tion is proposed and described herein. associated larval and pupal exuviae, it 1-u • ..u * ^u „.v>o „,.,o ,,<=^,, Materials AND Methods became obvious that the species was very different from Isoaedes, suggesting that it This study is based on larvae and belonged to a hitherto unrecognized adults reared individually from larvae

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Systematics of a new genus and cavernicolous species of the mosquito tribe aedini (Diptera Culicidae) from Thailand

Ralph E Harbach, Rampa Rattanarithikul, Theresa M Howard, Yvonne-Marie Linton and Ian J Kitching
Proceedings of the Entomological Society of Washington 109(2): 469-488 (2007)

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