Comprehensive Description

provided by Smithsonian Contributions to Zoology
Pterodrilus mexicanus Ellis, 1919:254.—Goodnight, 1940:63.—Causey, 1955:44.—Holt, 1968c: 15

TYPE-SPECIMEN.—Holotype (USNM 17654), taken on Procambarus mexicanus at Mirador, Mexico, by Nelson and Goldman (date unknown).

DIAGNOSIS (from Holt, 1968c: 15).—“Dorsal ridge on segment VIII, typically bearing four conical projections, remainder of segments without ridges; bursa large, elongate, length exceeding 1/2 body diameter; ejaculatory duct short; prostate about 1/2 diameter of and subequal in length to spermiducal gland, undifferentiated; spermatheca shorter than body diameter, bulb thick-walled.”

HOSTS.—Procambarus mexicanus in Mexico (Ellis, 1919) and eight species of Orconectes Cope, 1872, in the Ozark plateau region of Arkansas, Oklahoma and Missouri (Holt, 1968c: 16).
bibliographic citation
Holt, Perry C. 1973. "A summary of the branchiobdellid (Annelida: Clitellata) fauna of Mesoamerica." Smithsonian Contributions to Zoology. 1-40. https://doi.org/10.5479/si.00810282.142