Dolichorhabditis tereticorpus Kito & Ohyama, 2008, sp. n.

• Main Authors: Kito, Kenji, Ohyama, Yoshikuni
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2008
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Secernentea; Rhabditida; Rhabditidae; Dolichorhabditis; Dolichorhabditis tereticorpus; Antarc*; Antarctica; East Antarctica; Wilkes Land
• Online Access: https://doi.org/10.5281/zenodo.5619344; http://treatment.plazi.org/id/A62087CAFFBEFF8AFF6C6A18FBC0FC4E

Dolichorhabditis tereticorpus sp. n. (Fig.2, 3) Type specimens. Eight females. Holotype ZIHU 3317 and paratypes ZIHU 3318-3324, deposited in collections of the Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan. Collected by K. Kito on February 8, 1996. Type locality and habitat. Rocky coast facing Shannon Bay near Casey Station (66o17’S, 110 o32’E), Bailey Peninsula, Budd Coast of Wilkes Land, East Antarctica [Sector 2 of Andrássy (1998)]. Sediment contaminated with the treated effluent disposed from the station. Measurements. Table 1. Characters: a,b,c, de Man's ratios; V, position of vulva as a percentage of the body length from anterior end. Description. FEMALE (Holotype ZIHU 3317: range and/or avg±sd for 8 specimens in parentheses). Body (Fig. 2 -A) almost cylindrical, gradually tapering to anterior end, abruptly tapering from level of anus to tail end. Maximum body diameter near or at level of vulva. Cuticle 0.6-0.9 μm thick, transversely striated, annules 0.8 (0.8–1.1) µm wide at midbody. Lateral field with four longitudinal lines (three ridges), but often inconspicuous (Fig. 2 F, G); 2.3–5.6 µm wide or about 8–16 % of body diameter at level of vulva in paratypes. Head (Fig. 2 C) truncate, not offset or weakly offset; six lips slightly protuberant, equipped with 6+4 papilliform sensilla. Amphid aperture small, oval-shaped, located on lateral lips. Stoma nearly cylindrical, 1.9 (1.9– 2.7, 2.2±0.3) lip region diameters or 3.8 (3.7–4.9, 4.1±0.4) stoma diameters in length; cheilostom unsclerotized, promesostom cylindrical, well cuticularized and slightly tapering anteriorly; glottoid apparatus isomorphic, metastom with two tooth-like denticles. Pharyngeal collar extending to middle of stoma, about 0.6 (0.5– 0.6) stoma lengths. Corpus of pharynx (Fig. 2 B) almost cylindrical without a median bulb or swelling, junction with isthmus marked by expansion of triradiate lumenal rays and transverse slit of muscular wall (Fig. 3 A), 54 (53–57, 54±1.6) % of pharynx length, ...