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Ammotrecha nigrescens Roewer 1934
Ammotrecha nigrescens ►Roewer,
1934: 598, figs 336e, 337f; ►Muma, 1970a: 46, 48, 50, 51, fig. 39; ►Muma, 1976: 26;
►Muma,
1986: 21; ►Muma,
1987: 21; Armas, 1996b: 32; ►Harvey, 2003: 200; ►Armas, 2004b: 60. TYPES: Guatemala: [locality?], 1894 (Stoll), 1 male; and Costa Rica: San Jose Province - San Jose, [date, collector?], 2 females [?]. [Roewer (1934) indicated that he examined 1 male and 2 females from Guatemala and Costa Rica, including the type) in the British Museum of Natural History, but failed to indicate which of the specimens was the holotype. Muma later located and characterized the male cited above, but did not designate it as a lectotype.] Original description: Roewer, 1934: 598, figs 336e, 337f: : "Die Spitze der Flagellum-Spelze reicht nur bis zum zum 1. Vorderzahn nach vorn; unbeweglicher Finger mit 4 lateralen und 3 medialen Wangenzähnen; Gebiß Abb. 337,]; Pedipalpen an Femur und Tibia nur behaart, am Metatarsus ventral mit 5 Paar Dornen und zahlreichen Zylinderborsten (Abb. 336, e); 2. und 3. Metatarsus dorsal mit je einer Längsreihe aus 3 Dornen und ventral wie auch 4. Metatarsus mit je 1.1.2 Dornen. Färbung der Cheliceren und des Propeltidium dunkel gebräunt, erstere mit 2 noch dunkleren Längsstreifen, Opisthosoma dorsal dunkelbraun, mit vollständiger, breiter weißgelber Mittelbinde; Sternite, Coxen und Malleoli weißgelb, Pedipalpen bis auf den blaßgelben Tarsus ganz dunkelbraun; Korperlänge 12 mm." Unbeweglicher Finger mit dorsalem, stark chitinisiertem, abgesetztem Buckel, mit 4 lateralen und 3 medialen Wangenzahnen; Gebiß im übrigen wie Abb. 338, b; Pedipalpen behaart, Metatarsus ventral mit 5 Paar Dornen und zahlreichen Zylinderborsten; Bewehrung der Beine und Färbung wie beim ♂; Körperlänge 18 mm. ♀: "Unbeweglicher Finger mit dorsalem, stark chitinisiertem, abgesetztem Buckel, mit 4 lateralen und 3 medialen Wangenzahnen; Gebiß im übrigen wie Abb. 338, b; Pedipalpen behaart, Metatarsus ventral mit 5 Paar Dornen und zahlreichen Zylinderborsten; Bewehrung der Beine und Färbung wie beim ♂; Körperlänge 18 mm."
[♂:
The
tip of the flagellar membrane extends forward only to the 1st anterior
tooth; fixed finger with 4 lateral and 3 medial cheek teeth; [dentition
fig. 337, e]; Pedipalp only hairy on femur and tibia, with 5
pairs of spines and numerous cylinder bristles ventrally on the
metatarsus (fig. 336, e); 2nd and 3rd metatarsus dorsally with
longitudinal row of 3 spines and ventrally, as with the 4th metatarsus,
each with 1.1.2 spines. Coloration of the chelicerae and the
propeltidium darkly tanned, in the former with 2 even darker
longitudinal stripes, opisthosoma dorsally entirely dark brown, with
light tan middle patch; sternites, coxae and malleoli pale yellow,
pedipalps entirely dark brown up to the pale yellow tarsus; Body length
12 mm.
Fig. 337f - Right male chelicera, mesal view.
SUBSEQUENT ACCOUNTS:
DISTRIBUTION: Guatemala, Costa Rica.
Published Records:
NOTES: Roewer (1934) attributed this species to Pocock, and reported that he examined specimens in the British Museum (including the type) from both Guatemala and Costa Rica (San Jose, San Jose Province), but provides no specific data for those specimens. Muma (1970) commented that this species can be considered valid only if the tarsal setal formulae are correct and diagnostic, opining that it otherwise is a junior synonym of Ammotrechella stimpsoni (Putnam). He did not indicate that he had examined the female specimens cited by Roewer (1934) in the original species description. Muma (1976) included this species in a list of Western Hemisphere solifuges, recording its distribution as Costa Rica and Guatemala, noting that it was apparently known from two collections (both sexes). He reported that the male type from Guatemala is in the BMNH, but that the fremale type was not located. Muma (1986, 1987) included this species in a list of families, genera, and species previously recorded from Mexico, Central America, and the West Indies. He reported that this species has been recorded from Guatemala, Costa Rica (San Jose), and the West Indies, but provided no data regarding those records. Armas (2004) included the species in a catalog of the solifuges of Central America and the Antilles, reporting its distribution as Guatemala and Costa Rica, and referred to a "macho holotipo" [male holotype] in the BMNH.
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