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Type: Articles
Published: 2004-10-04
Page range: 1–8
Abstract views: 47
PDF downloaded: 5

Description of the females of Oxysoma itambezinho Ram rez and Monapia tandil Ram rez, and their effects on the generic relationships of Gayennini (Araneae, Anyphaenidae, Amaurobioidinae)

División Aracnología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Av. Angel Gallardo 470 C1405DJR, Buenos Aires, Argentina
División Aracnología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Av. Angel Gallardo 470 C1405DJR, Buenos Aires, Argentina
División Aracnología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Av. Angel Gallardo 470 C1405DJR, Buenos Aires, Argentina
Araneae Anyphaenidae taxonomy cladistics South America

Abstract

The females of Oxysoma itambezinho Ram rez and Monapia tandil Ram rez are described for the first time, and new observations are added to a previous dataset for phylogenetic analysis. Oxysoma itambezinho differs from other Oxysoma species by the presence of unmodified copulatory ducts, not encircling the spermathecae. Monapia tandil resembles some Monapia species by the presence of a posteriorly directed pouch on the median epigynal field, unlike its sister species, M. vittata. The resulting phylogenetic trees are the same as previously obtained, but these instances of homoplasy decreased the support for some groups inside Oxysoma and Monapia.

References

  1. Bremer, K. (1994) Branch support and tree stability. Cladistics, 10, 295–304.

    Goloboff, P.A. (1993a) Estimating character weights during tree search. Cladistics, 9, 83–91.

    Goloboff, P.A. (1993b) Nona version 2.0. Program and documentation, distributed by the author, San Miguel de Tucumán, available at http://www.zmuc.dk/public/phylogeny/ (last accessed September 2004).

    Goloboff, P.A. (1997) Pee-Wee version 3.0. Program and documentation, distributed by the author, San Miguel de Tucumán, available at http://www.zmuc.dk/public/phylogeny/ (last accessed September 2004).

    Goloboff, P.A., Farris, J.S., Källersjö, M., Oxelman, B., Ramírez, M.J. & Szumik, C.A. (2003) Improvements to resampling measures of group support. Cladistics, 19, 324–332.

    Ramírez, M.J. (1995) Revisión y filogenia del género Monapia (Araneae, Anyphaenidae), con notas sobre otras Amaurobioidinae. Boletín de la Sociedad Biológica de Concepción, 66, 79–110.

    Ramírez, M.J. (1999) New species and cladistic reanalysis of the spider genus Monapia (Araneae: Anyphaenidae, Amaurobioidinae). Journal of Arachnology, 27, 415–431.

    Ramírez, M.J. (2003) A cladistic generic revision of the spider subfamily Amaurobioidinae (Araneae, Anyphaenidae). Bulletin of the American Museum of Natural History, 277, 1–262.