Carnoya cepacapitatus n. sp. and C. mexicana n. sp. (Ransomnematoidea: Carnoyidae) from Anadenobolus putealis Loomis, 1969 (Diplopoda: Rhinocricidae) from Mexico.

Carnoya cepacapitatus n. sp. and C. mexicana n. sp. from the intestine of Anadenobolus putealis from Mexico are described herein. Specific characters like the number of collars and spines set these species apart from those previously described from the Caribbean and South American regions. Males of C. cepacapitatus n. sp. can be differentiated from those of all other described species of Carnoya from the Americas by the presence of a broader cephalic annule two annules posterior to the lip region, eight transverse rows of spines linearly arranged on cervical region, finely striated regions at the midventral body section and in the region posterior to cloacal aperture, and a pair of double postcloacal papillae, females by a spherical, knob-like annule posterior to lip region, annulated neck region with fourth annule wider than the other six, and 15 spined cervical collars. Males of C. mexicana n. sp. can be differentiated from other described species by the presence of minute and irregularly distributed cervical spines placed on 11 annules, plus an elevated lip region; females bear 15 cervical collars with leaf-like spines. Carnoya cepacapitatus n. sp. closely resembles C. caputbulla, whereas C. mexicana n. sp. resembles several species of Caribbean distribution, mainly C. haiti, but differs from all of them primarily in the number, distribution and size of the cervical spined collars. Females of C. cepacapitatus n. sp. resemble Asian species that possess a knob-like cephalic region. Carnoya mexicana n. sp. resembles more closely the American species of this genus based on the form of the cephalic region in both sexes, but especially the number and distribution of the spined collars in the male. Partial sequences of SSU and LSU are presented for females of both species. [ABSTRACT FROM AUTHOR]