Skip to main content Skip to main navigation menu Skip to site footer
Responsive image
Issue: Vol. 2057 No. 1: 30 Mar. 2009
Type: Article
Published: 2009-03-30
DOI: 10.11646/zootaxa.2057.1.4
Page range: 63–68
Abstract views: 48
PDF downloaded: 2

A new genus of Stygninae from a relictual rainforest in Ceará, northeastern Brazil (Opiliones, Laniatores, Stygnidae)

Departamento de Invertebrados, Museu Nacional/UFRJ, Quinta da Boa Vista, São Cristóvão, 20.940-040, Rio de Janeiro - RJ – BRAZIL
Opiliones Arachnida harvestmen Grassatores Neotropics Caatinga montane forests

Abstract

Ricstygnus quineti gen. nov. sp. nov. (Stygninae) is described from a "brejo de altitude" in Ceará state, northeastern Brazil, this being the first record of the family Stygnidae from the state. The new genus is characterized by the paired scutal armature in the form of acuminate tubercles increasing in size from area III to posterior margin of scutum, free tergite I with a pair of robust acuminate spiniform apophyses that are by far the stoutest of those on the dorsum, subtrapezoid scutum widest posteriorly with long carapace, and several unique genital features, as for example the presence of dorso-basal hollow in ventral plate containing a multiply folded haematodocha.

References

  1. Andrade-Lima, D. (1982) Present-day refuges in northeastern Brazil. In: Prance, G.T. (Ed.), Biological diversification in the tropics. Columbia Univ. Press, New York, pp. 245–251.

    Cavalcante, A.M.B. (2005) Jardins suspensos no sertão. Scientific American (Brazilian Edition), 32, 66–73.

    Hara, M.R. & Pinto-da-Rocha, R. (2008) A new species and new distribution records of Pickeliana (Opiliones: Laniatores: Stygnidae). Revista Brasileira de Zoologia, 25, 515–522.

    Kury, A.B. (2003) Annotated catalogue of the Laniatores of the New World (Arachnida, Opiliones). Revista Ibérica de Aracnología, vol. especial monográfico, 1, 1–337.

    Kury, A.B. & Pinto-da-Rocha, R. (2008) First record of Stygnidae for the State of Espírito Santo and description of a new Protimesius (Arachnida: Opiliones: Laniatores). Revista Brasileira de Zoologia, 25 (2), 319–322.

    Pinto-da-Rocha, R. (1997) Systematic review of the Neotropical family Stygnidae (Opiliones, Laniatores, Gonyleptoidea). Arquivos de Zoologia, 33 (4), 163–342.

    Pinto-da-Rocha, R. (2007) Stygnidae Simon, 1879. In: Pinto-da-Rocha, R. Machado, G. & Giribet, G. (Eds.), Harvestmen: The Biology of Opiliones. Harvard University Press, Cambridge, MA, pp. 226–229.

    Roewer, C.F. (1923) Die Weberknechte der Erde. Systematische Bearbeitung der bisher bekannten Opiliones. Gustav Fischer, Jena, 1116 pp.

    Vanzolini, P.E. (1981) A quasi-historical approach to the natural history of the differentiation of reptiles in tropical geographic isolates. Papéis Avulsos de Zoologia, 34, 189–204.

    Villarreal-M.O. & Rodríguez-T.C. (2006) Nuevos registros del género Phareus Simon, 1879 en Colombia, con la descripción de una nueva especie (Opiliones, Stygnidae). Boletín de la Sociedad Entomológica Aragonesa, 38, 103–105.