Trilasma bolivari Goodnight & Goodnight, 1942

Shear, William A., 2010, New species and records of ortholasmatine harvestmen from Mexico, Honduras, and the western United States (Opiliones, Nemastomatidae, Ortholasmatinae), ZooKeys 52, pp. 9-46 : 34-35

Trilasma bolivari Goodnight & Goodnight, 1942 Figs 52, 53

Trilasma bolivari Goodnight and Goodnight 1942, p. 7; Roewer 1940, p. 56; Shear & Gruber, 1983, p. 42.

Notes.

Shear and Gruber (1983) provided a detailed description based on specimens from Llano Grande, Puebla, México, a location about 28 km due northwest of the type locality, Río Frío. Now, judging from Google Earth aerial photographs, both of these places have become heavily urbanized and it seems unlikely conditions exist any longer that could support this species. Shear and Gruber (1983) mapped some of the localities given by Goodnight and Goodnight (1942, 1945b), but were not able to find all of them. Shear and Gruber expressed doubt about the identity of specimens from the Nevada de Colima, Jalisco, locality in particular; it is far separated from the others, as is the Guanajuato locality ( Goodnight and Goodnight 1942). The presence of another species (see below) in Hidalgo, not far from the localities in Puebla and El Distrito Federal, suggests that at least the Guanajuato and Jalisco material may also represent undiagnosed species.

I no longer include Ruaxphilos petrunkevitchou Goodnight & Goodnight in the synonymy of Trilasma bolivari , as Shear and Gruber (1983) did, because of the distance between the type localities (that of petrunkevitchou is in Veracruz). It is very likely that petrukevitchou is another species, but the type is an early instar that has not developed any of the species-diagnostic characters. Its identity can only be established by the collection of adults at the type locality.

I provide some new illustrations (Figs 52, 53) for comparison with the other species described here as new. The illustrations are of a female specimen collected by Fred Coyle at the pass between Toluca and México City, Distrito Federal, on Rt. 15, elev. 3000 m (9800') asl, on 4 June 1982.