Two new genera and five new species of Selachinematidae (Nematoda, Chromadorida) from the continental slope of New Zealand Author Leduc, Daniel text European Journal of Taxonomy 2013 2013-11-13 63 1 32 journal article 22236 10.5852/ejt.2013.63 71a3f4b4-3e53-486e-9cee-0195fbbfb8e8 2118-9773 3823012 BB33641C-6FAF-4D2E-93FB-C4951F7C058C Genus Pseudocheironchus gen. nov. urn:lsid:zoobank.org:act: D308E75C-FF14-44AB-9DA3-E2297C691AF6 Type species Pseudocheironchus ingluviosus gen. et sp. nov. Diagnosis Cuticle without lateral differentiation or only weak lateral differentiation. Outer labial sensillae and cephalic setae in one circle; cephalic setae slightly longer than outer labial sensillae. Anterior portion of buccal cavity reduced, with six thin, slightly cuticularised rhabdions; posterior buccal cavity with three equal mandibles. Pharynx short, with well-developed anterior and posterior bulbs. Male with cupshaped pre-cloacal supplements. Tail short. Etymology This generic name refers to the close similarity between the new genus and Cheironchus . The two genera share a feature not found in any other genus of the Selachinematidae , viz ., a pharynx with conspicuous anterior and posterior bulbs. Remarks Pseudocheironchus gen. nov. is similar to Cheironchus in having a pharynx with well-developed anterior and posterior bulbs and cup-shaped pre-cloacal supplements. Pseudocheironchus gen. nov. differs from the latter in having a cuticle without or only weak lateral differentiation ( vs. lateral differentiation of larger, irregularly spaced punctations in Cheironchus ), cephalic setae only slightly longer than the outer labial sensillae ( vs. cephalic setae much longer than outer labia sensillae), and a posterior buccal cavity with three equal mandibles ( vs. dorsal mandible reduced). Pseudocheironchus gen. nov. is also similar to Synonchiella in having three equal mandibles in the posterior buccal cavity, but differs from the latter in having a pharynx with anterior and posterior bulbs ( vs. no pharyngeal bulb in Synonchiella ).