NEW SPECIES OF ALIPPISTRONGYLUS (TRICHOSTRONGYLINA: NIPPOSTRONGYLINAE) FROM THE ELEGANT RICE RAT, EURYORYZOMYS NITIDUS, OF LA CONVENCIÓN, PERU.

A new species of AlippistrongylusDigiani and Kinsella, 2014, was found in the intestines of the elegant rice rat, Euryoryzomys nitidus, collected in the Amazon rainforest. These mammals were preserved in alcohol and archived in the Colección Científica de Mamíferos del Museo de Historia Natural de la Universidad Mayor de San Marcos and accessed for the observation and investigation for the diversity of their endo-parasites. A total of 857 worms were recovered from the 3 individuals examined. Morphological investigations and comparisons with the only known species of the genus indicate that this is an undescribed species. These nematodes feature the diagnostic characteristic of the genus, being a bifurcated posterior end that consists of a tail and a conical appendage near the level of the vulva and uninterrupted ridges in the synlophe of unequal size. However, the orientation of this conical appendage on the female tail, features of the synlophe, and shape of the copulatory bursa warrant the proposal of an amended diagnosis to include character variability detected in the new species.

A New Species of Ancylostoma (Nemata: Strongylida: Ancylostomatidae) from Two Species of Ctenomys in Lowland Bolivia.

From the small intestines of both Ctenomys boliviensis and Ctenomys steinbachi collected from August 1984 through June 1990 from the eastern lowlands of the Department of Santa Cruz, Bolivia a total of 36 specimens of Ancylostoma were recovered. Morphological investigation and comparisons with known species described and reported from mammals in the Neotropical Region show that this is an undescribed species, herein described as new. These nematans were collected from individuals of C. steinbachi collected from near a locality called Caranda (northwest of Santa Cruz de la Sierra) and from C. boliviensis from near Santa Rosa de la Roca (northeast of Santa Cruz de la Sierra) and from cajuchis collected from 3 km west of Estación El Pailón, 30 km east of Santa Cruz de la Sierra. The new species of Ancylostoma differs from all other species of Ancylostoma known from the Neotropical Region in the presence of paired sub-terminal papillae on the dorsal ray of males.