Procambarus oaxacae Hobbs 1973

Procambarus (Austrocambarus) oaxacae reddelliHobbs

Procambarus (Austrocambarus) oaxacae reddelli Hobbs, 1973a: 33–38, figs. 6–8.—Reddell, in press.

Troglobitic crayfish.—Reddell, 1973b:89.

Procambarus oaxacae reddelli.—Hobbs, 1973b:73.

DIAGNOSIS.—Body without pigment or with tan suffusion on abdomen; eyes with distinct black pigmented faceted area. Areola constituting 33.2 to 35.7 percent of total length of carapace (42.0 to 44.4 percent of postorbital carapace length). Cervical spine present. Antennal scale broadest distal to midlength. Coxa of fifth pereiopod lacking prominent sclerotized caudomesial boss. First pleopod of first form male with mesial process not strongly flattened, tapering distally, and directed more distally than laterally; central projection lacking accessory tooth; and caudal element lacking cushion-like prominence.

SIZE.—Carapace length 37.4 mm; postorbital carapace length 30.5 mm.

TYPES.—Holotype, allotype, and morphotype, USNM 144346, 144347, 144348 ( I, , II); paratypes, IBM, TTM, USNM.

TYPE-LOCALITY.—Cueva del Nacimiento del Río San Antonio, 10 km SSW of Acatlán, Oaxaca, Mexico.

RANGE.—Mexico. This crayfish is known with certainty only from the type-locality. Atypical representatives were found in Cueva del Guayabo, 12 km NE of Valle Nacional, Oaxaca, exhibiting characteristics suggesting a possibility of gene flow between this and the nominate subspecies.

ECOLOGICAL

Procambarus (Austrocambarus) oaxacae oaxacaeHobbs

Procamarus (Austrocambarus) oaxacae oaxacae Hobbs, 1973a: 29–33, 38, figs. 3–5.—Reddell, in press.

Blind crayfish.—Reddell, 1973b:90.

DIAGNOSIS.—Body with markedly reduced pigmentation, virtually albinistic but often with slight tan suffusion on abdomen; eyes reduced in size with or without traces of facets, frequently with few ommatidia bearing reddish purple pigment, but with pigmented area not sharply margined. Areola constituting 35.8 to 37.8 percent of total length of carapace (43.7 to 46.1 percent of postorbital carapace length). Cervical spine obsolete. Antennal scale broadest distal to midlength. Coxa of fifth pereiopod lacking corneous caudomesial boss. First pleopod of first form male with mesial process not strongly flattened, tapering distally, and directed more distally than laterally; central projection lacking accessory tooth; and caudal element lacking cushion-like prominence.

SIZE.—Carapace length 30.9 mm; postorbital carapace length 25.4 mm.

TYPES.—Holotype, allotype, and morphotype, USNM 144341, 144342, 144343 ( I, , II); paratypes, IBM, TTM, USNM.

TYPE-LOCALITY.—Cueva del Guano, 10 km NE of Valle Nacional, Oaxaca, Mexico.

RANGE.—Mexico. Known only from the type-locality.

ECOLOGICAL