Zootaxa, Megaphobema Teceae N. Sp. (Araneae, Theraphosidae)

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Zootaxa, Megaphobema Teceae N. Sp. (Araneae, Theraphosidae)

Zootaxa 1115: 61–68 (2006) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 1115 Copyright © 2006 Magnolia Press ISSN 1175-5334 (online edition) Megaphobema teceae n. sp. (Araneae, Theraphosidae), a new theraphosine spider from Brazilian Amazonia FERNANDO PÉREZ-MILES1, LAURA T. MIGLIO2 & ALEXANDRE B. BONALDO2 1Seccíon Entomología, Facultad de Ciencias, Iguá 4225, 11400 Montevideo, Uruguay. E-mail: [email protected] 2Coordenação de Zoologia, Museu Paraense Emílio Goeldi, Av. Magalhães Barata, 376, Caixa Postal 399, 66040-170, Belém, PA, Brazil. E-mails: [email protected]; [email protected] Abstract A new species from Juruti River Plateau, Juruti, Pará, Brazil that fits the generic characters of Megaphobema is described. Megaphobema teceae n. sp. differs from the other four species known in this genus mainly by the presence of a conspicuous post-ocular process. This is the first record of the genus to both oriental Amazon and Brazil. Keywords: Araneae, Theraphosidae, Megaphobema, Brazilian Amazon, Neotropical, Taxonomy Introduction The genus Megaphobema Pocock 1901 comprises very large spiders from Central América (Costa Rica) and North-western South America (Colombia and Ecuador). Males are characterized by a palpal organ with a very wide concave-convex embolus with prolateral superior and inferior keels, and apical and prolateral accessory keels. The prolateral accessory keels are also present in males Sericopelma Ausserer 1875 but they can be distinguished from Megaphobema by the absence of a tibial apophysis. Females have one spermathecal receptacle transversely striated the synapomorphy of Megaphobema + Sericopelma + Theraphosa Thorell 1870. The genus has both Type I and III urticating hairs. Using these characters among others, this genus was placed in the apical portion of the cladogram of the Theraphosinae (Pérez-Miles et al. 1996; Pérez- Miles 2000) and seems to be more related to Sericopelma and Theraphosa than to Brachypelma Simon 1891, although Brachypelma appears to be the sister-group of the clade formed by Megaphobema + its sister-group. Our study of 14 individuals collected in Accepted by R. Raven: 16 Nov. 2005; published: 27 Jan. 2006 61.

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