Rhabdias tokyoensis Wilkie, 1930

KUZMIN, YURIY, 2013, Review of Rhabdiasidae (Nematoda) from the Holarctic, Zootaxa 3639 (1), pp. 1-76 : 54-55

Rhabdias tokyoensis Wilkie, 1930

( Fig. 29 )

Hosts: Cynops pyrrhogaster , C. ensicauda ( Amphibia: Caudata : Salamandridae ).

Site: lungs.

Distribution: Eastern Palaearctic (Japanese Isles).

Description. Comparatively large species. Body length 15.25 (12.45–17.25) mm, maximum width 613 (506–

664). Oral opening round. Six lips small, situated at approximately equal distance from the edge of oral opening. Vestibulum reduced. Buccal capsule cup-like, 17 (16–20) deep and 32 (30–34) wide. Oesophagus with comparatively short muscular part and longer glandular part widening posteriorly. Oesophagus length 658 (548– 714), or 4.4 (3.2–5.3) % of body length. Oesophagus width at anterior end 60 (54–64), posterior dilation 114 (96– 132) wide. Nerve ring at 163 (141–183) from anterior end of oesophagus (25.1 [22.1–28.8] % of oesophagus length). Intestine wide, thin-walled. Rectum narrow, weakly sclerotised. Vulva at 7.83 (6.32–9.62) mm from anterior end (52.7 [50.8–55.8] % of total length). Uteri long, tubular, filled with numerous egg. Most eggs containing larvae. Egg size 99–126 × 48–62 (after Yamaguti 1935). Posterior ovary loop close to caudal part of body. Tail short, abruptly tapering, 202 (174–232) long (1.4 [1.0–1.6] % of body length). Tail end sharply pointed.

Material studied: about 30 specimens ( SIZK, collected by Dr. Hasegawa) from C. ensicauda (Okinawa Island, Japan) of which 10 were measured .

References: Wilkie (1930), Yamaguti (1941), Hasegawa (1984).

Figures

FIGURE 29. R. tokyoensis. A—anterior part of body, lateral view; B—head end, lateral view; C—tail end, lateral view. Scale bars: A, C—0.3 mm; B—0.1 mm.