ABSTRACT
Skrjabinoptera vietnamensis n. sp. is described from specimens recovered from the stomach of Eutropis macularia in north-central Vietnam. The new species is characterized by the medium-sized male worms (6.7-8.7 mm in length and 154-182 µm in width) relative to known members of the genus, 2 pointed spicules of unequal length (87-112 µm and 56-72 µm in length), and 10 pairs of caudal papillae. Female worms are larger than male worms (10.7-18.4 mm in length and 264-411 µm in width), with the vulva situated in the anterior part, and embryonated, elliptical eggs, 35-46 µm long by 20-24 µm wide. Skrjabinoptera vietnamensis n. sp. represents the ninth species assigned to the genus and the first species recorded from the Oriental region. Partial sequences of the 18S ribosomal RNA gene (rDNA), and cytochrome c oxidase subunit 1 (COI) are provided for the new species. The molecular phylogenetic position of the genus Skrjabinoptera is briefly discussed.
Subject(s)
Lizards/parasitology , Spirurida Infections/veterinary , Spirurina/classification , Animals , Bayes Theorem , DNA, Helminth/chemistry , DNA, Helminth/genetics , DNA, Helminth/isolation & purification , DNA, Ribosomal/chemistry , Female , Male , Microscopy, Electron, Scanning/veterinary , Phylogeny , RNA, Ribosomal, 18S/genetics , Spirurida Infections/parasitology , Spirurina/anatomy & histology , Spirurina/genetics , Spirurina/ultrastructure , Stomach/parasitology , VietnamABSTRACT
Falcaustra vietnamensis n. sp. is described from the small intestine of Physignathus cocincinus from north-central Vietnam. The new species is characterized by the large male worms (20.2-28.8 mm in length and 557-724 µm in width) relative to known members of the genus, 2 sharply pointed alate spicules of equal length (1,128-1,256 µm in length), gubernaculum including 2 separate pieces, 1 ventral with a pointed distal end and 1 dorsal with a blunt distal end (164-192 µm and 155-172 µm in length, respectively), and 12 pairs of caudal papillae. Female worms are larger than male worms (24.2-34.1 mm in length and 532-735 µm in width), with the vulva situated in the posterior half of body, and elliptical eggs, 60-70 µm long by 42-47 µm wide. Falcaustra vietnamensis n. sp. represents the 38th species assigned to the genus and the third species recorded from a lizard host in the Oriental biogeographical region. Partial sequences of the 18S ribosomal RNA gene (rDNA), internal transcribed spacer regions (ITS), and cytochrome c oxidase subunit 1 (COI) are provided for the new species. The molecular phylogenetic position of the genus Falcaustra is briefly discussed.