Gerdesius, ROEWER, 1952

Bragagnolo, Cibele, Hara, Marcos R. & Pinto-Da-Rocha, Ricardo, 2015, A new family of Gonyleptoidea from South America (Opiliones, Laniatores), Zoological Journal of the Linnean Society 173 (2), pp. 296-319 : 306-309

GERDESIUS ROEWER, 1952

Gerdesius Roewer, 1952: 50 ; Kury 2003: 170 (type species: Gerdesius peruvianus Roewer, 1952 by original designation).

Huralvioides H. Soares, 1970: 333 ; Kury, 1995: 316; 2003: 173 (type species: Huralvioides paruensis H. Soares, 1970 by original designation) syn nov.

Diagnosis

Ocularium armed with one spine. Scutal area I entire or with a very shallow median longitudinal groove dividing in right and left halves ( G. hoeferi ), and scutal groove II complete (reaching lateral groove) or incomplete (not reaching lateral groove). Male coxa IV with prolateral apical or dorsoapical moderately elongated apophysis. Anal operculum with variable armature from a discrete elevation to a stout apophysis. Cheliceral segment I covered laterally by few tubercles on bulla; segment II not enlarged. Pedipalpal femur with weak tubercles. Penis: glans apex dorsoventrally flattened, laterally widened; ventral process of glans with a triangular shaped, laterally flattened projection (without flabellum) or with a narrow flabellum ( G. paruensis ); stylus apically swollen, laterally flattened or normal (not inflated) and cylindrical; ventral plate reduced (lamina parva) with very long setae organized in two rows in lateral view.

Composition

Gerdesius peruvianus Roewer, 1952 , G. hoeferi ( Kury, 1995) comb. nov., G. mapinguari sp. nov., G. paruensis (H. Soares, 1970) comb. nov.

Distribution

Known from the Amazonian forest in Peru (Loreto) and Brazil ( Amazonas and Pará states). All species are only known from the type localities, except for G. paruensis , which has been recorded from both sides of the Amazon River in east Pará .