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Falcaustra desilvai sp. nov. (Ascaridida, Kathlaniidae) from the large intestine of Cnemaspis aff. tropidogaster (Squamata, Gekkonidae) is described and illustrated. Falcaustra desilvai represents the 4th nematode species from Sri Lanka to be assigned to the genus and is distinguished from other Sri Lankan species by the distribution pattern of caudal papillae (12 precloacal, 2 adcloacal, 10 postcloacal, and 1 median), length of spicules (956–1046 μm) and absence of a pseudosucker.
A West African species of gecko, Tarentola parvicarinata Joger (Gekkonidae), collected in the Niokolo Koba National Park in East Senegal is a new host species for the nematode Parapharyngodon echinatus (Rudolphi, 1819). Fifty one specimens of P. echinatus were studied under a light microscope and thirteen specimens were studied for the first time by a scanning electron microscope. The main differences between P. echinatus and other African species, especially Parapharyngodon micipsae (Seurat, 1917), were in the shape of annules on body cuticle, broad lateral alae and their terminations, the shape of the distal extremity of the spicule and number of outgrowths at the anterior cloacal lip. For the purposes of DNA characterization, partial sequence of the small subunit ribosomal RNA gene (SSU rRNA) was obtained from two specimens of P. echinatus. This is the first published sequence of a species from the family Pharyngodonidae.
Two new nematode species, Bakeria schadi sp. nov. and Falcaustra malaysiaia sp. nov. from the gastrointestinal tract of McGuire’s rock gecko, Cnemaspis mcguirei (Sauria: Gekkonidae) collected in Peninsular Malaysia are described. The two species now assigned to Bakeria are separated on the bases of male bursa type and location of the excretory pore: type II in B. schadi sp. nov. and type I in B. bakeri; location of excretory pore, anterior to nerve ring in B. schadi sp. nov. and posterior to nerve ring in B. bakeri. Falcaustra malaysiaia sp. nov. is most similar to F. chabaudi, F. concinnae, F. condorcanquii, F. barbi, F. dubia, and F. tchadi in that these 7 species possess 1 pseudosucker, 1 median papilla plus 10 pairs caudal papillae, and spicules with lengths between 1 and 2 mm. F. barbi and F. tchadi lack adcloacal papillae; the remaining 5 species possess 1 pair of adcloacal papillae. Falcaustra chabaudi is known from Nearctic salamanders; F. concinnae from Nearctic turtles; F. condorcanquii from Neotropical frogs, F. dubia from Oriental frogs, and F. malaysiaia sp. nov. from Oriental geckos. Two additional species of Nematoda were found, Cosmocerca ornata and Meteterakis singaporensis. Cnemaspis mcguirei represents a new host record for Cosmocerca ornata and Meteterakis singaporensis.
Pharyngodon novaeguineae sp. nov. from the large intestines of Cyrtodactylus louisiadensis (Sauria, Gekkonidae), from Papua New Guinea is described and illustrated. Pharyngodon novaeguineae represents the 36th species assigned to the genus and is separated from its congeners based upon absence of a spicule, egg morphology, and excretory pore position.
Pharyngodon duci sp. nov. and Spauligodon vietnamensis sp. nov. (Nematoda, Pharyngodonidae) from the large intestine of a gecko, Gekko ulikovskii (Sauria, Gekkonidae), from Vietnam are described and illustrated. Pharyngodon duci is the 35th species assigned to the genus and is separated from its congeners based upon the lack of a spicule, egg morphology, mouth morphology and cloacal lip morphology. Spauligodon vietnamensis is the 44th species assigned to the genus and is separated from its congeners by the lack of a spicule, egg morphology, and tail filament morphology.
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