Geraeocormobius sylvarum Holmberg, 1887

Pinto-da-Rocha, Ricardo, Benedetti, Alipio Rezende, de Vasconcelos, Eduardo Gomes & Hara, Marcos Ryotaro, 2012, New systematic assignments in Gonyleptoidea (Arachnida, Opiliones, Laniatores), ZooKeys 198, pp. 25-68 : 31-32

Geraeocormobius sylvarum Holmberg, 1887

Geraecormobius sylvarum Holmberg, 1887: 211, fig. unnumbered (♂); Kury 2003: 125; (1 male & 1 female syntypes, Argentina , Misiones, Santa Ana, near river Piraí Mirín, type depository unknown).

Discocyrtus serrifemur Roewer, 1943: 21, fig. 10 (♂); (1 male & 8 female syntypes, Brazil, Santa Catarina , Nova Teutônia, SMF 6193/104, examined). Syn. n.

Geraeocormobius sylvarum Acosta et al. 2007a: 303, figs 1-3 (map, ♂♀).

Other material examined.

Brazil. Paraná: Cachoeirinha, 2 ♂ & 5 ♀ (MNRJ 26912); Paranavaí, 6 ♂ & 7 ♀ (MNRJ 4732).

Taxonomical note.

Roewer (1943) placed Discocyrtus serrifemur in the Pachylinae based on the observation of pigmentation on posterior part of dorsal scutum, which he assumed erroneously to be the scutal area IV. Both sexes of type series of Discocyrtus serrifemur are identical to Geraeocormobius sylvarum . In general, females of Gonyleptinae do not show conspicuous diagnostic characters, which are mainly seen in male tegumentary ornamentation. Both male and female specimens of Geraeocormobius sylvarum preserved in 70% alcohol present a general black coloration with olive or yellowish lateral marks on the dorsal scutum, with white pedipalps. Geraeocormobius sylvarum could be confused with Geraeocormobius rohri ( Mello-Leitão) and Geraeocormobius salebrosus (Roewer) because of its relatively larger body size, presence of large rounded tubercles on the scutal area III, general black coloration and geographical occurrence. However, Geraeocormobius sylvarum can be distinguished from them by the white pedipalps.