Abstract
Porocephalus crotali was first described by Humboldt in 1808 as Echinorhynchus crotali. Other important synonyms for the adult are Pentastoma proboscideum Rudolphi, Porocephalus humboldtii Mayer, Linguatula quadriuncinata Mayer and Pentastoma moniliforme Megnin; and, for the nymphal form, P.entastoma subcylindricum Diesing. Porocephalus crotali, according to Sambon (1922), has a limited distribution, the adults being found principally in New World crotaline snakes, especially the species of Crotalus which range from Arizona, New Mexico and Texas to southern Brazil and northern Argentina. The type specimen was taken from the South American rattlesnake, Crotalus durissus terrificus Laurenti. It has also been recorded from C. durissus durissus, C. atrox, C. horridus ssp., and C. adamanteus. Dr. Howard R. Hill at the Los Angeles Museum states3 that he has found P. crotali commonly in the water-moccasin (Agkistrodon piscivorus); this reptile has also been recorded as a host of the adult by the writer (1940). Sambon (1922) and Heymons (1935) state that the nymphal form has been reported from several Brazilian mammals (MARSUPIALIA: the
Published Version
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