Systematic position of some Nearctic Heligmosomoidea (Nematoda, Trichostrongylina) from the U.S. National Parasite Collection and their description.

DURETTE-DESSET, M-C.,; DIGIANI, M.C.

JOURNAL OF PARASITOLOGY

Allen Press

Lugar: Lawrence, Kansas; Año: 2005 vol. 91 p. 893 - 899

0022-3395

The systematic position of some heligmosomoid nematodes from rodents, deposited in the U.S. National Parasite Collection (USNPC), is revised, mainly through the study of their synlophe, which in all cases was unknown or insufficiently described. The material was registered as different species of Longistriata Schulz, 1926, a genus whose representatives are only parasitic in Holarctic insectivores. Longistriata norvegica Dikmans, 1935, parasitic in Rattus sp. becomes a synonym of Hassalstrongylus aduncus (Chandler, 1932). Specimens registered as Longistriata dalrymplei Dikmans, 1935 from Ondatra zibethicus are confirmed to belong to Carolinensis (Travassos, 1937). Specimens registered as Longistriata noviberiae Dikmans, 1935, parasitic in Sylvilagus floridanus alacer, were found to belong to Vexillata, and Vexillata noviberiae n. comb. is here proposed. This is the first record of a species of Vexillata in a lagomorph. Other specimens registered as L. norvegica, parasitic in Geomys floridanus austrinus, were also found to be an undescribed species of Vexillata Hall, 1916, which is named Vexillata chitwoodi n. sp. This is similar to V. chabaudi Yoyotte-Vado, 1972, V. petteri Durette-Desset, 1970, V. scorzai Guerrero, 1984 and V. tejerai Guerrero, 1984, all having the same number of cuticular ridges (4 dorsal, 5 ventral) and the division of the dorsal ray at its apex. The most related species is V. chabaudi, which is differentiated from the new species by rays 4 not curved distally, by thick rays 8 and by a dorsal ray enlarged at the level of the arising of rays 8.