Rhabditidae

Kito, Kenji & Ohyama, Yoshikuni, 2008, Rhabditid nematodes found from a rocky coast contaminated with treated wastewater of Casey Station in East Antarctica, with a description of a new species of Dolichorhabditis Andrássy, 1983 (Nematoda: Rhabditidae), Zootaxa 1850, pp. 43-52 : 49-51

Rhabditidae sp. 2

( Fig. 4 C–E; Table 2 )

A single female ( ZIHU 3328) slightly shrunken in the anterior portion of the body, probably due to fixation ( Fig. 4 C).

Head ( Fig. 4 E) rounded, weakly offset; six lips low and closed, equipped with 6 + 4 papilliform sensilla. Stoma curved; cheilostom sclerotized, promesostom with tooth-like dorsal projection; glottoid apparatus appearing anisomorphic, metastom with two warts. Pharynx ( Fig. 4 D) with muscular median bulb. Excretory duct weakly cuticularized. Reproductive system amphidelphic; anterior and posterior ovaries reflexed dorsally. Vulva transversely slit-like, located before midbody. Rectum ( Fig. 4 F) long, 2.2 abd in length, with three large gland cells. Tail elongated conical, 15.3 abd length.

The present species seems similar to the genera such as Cephaloboides Rahm, 1928 , Diploscapteroides Rahm, 1928 and Rhabditella (Cobb, 1929) Chitwood, 1933 , in having the stoma equipped with sclerotized cheilostom and tooth-like dorsal projection.

Figures

FIGURE 4. Rhabditidae sp. 1. Female (A, B, ZIHU 3326; left side view): A) Anterior region, with internal fungal hyphae. B) Tail. Rhabditidae sp. 2. Female (C – F, ZIHU 3328; left side view): C) Entire body. D) Anterior region. E) Stoma. F) Anal region. Scales: A, B, D – F: 10 µm; C: 80 µm.