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

Rhabditidae sp. 1

( Figs 4 A, B; Table 2 )

The three dead females (ZIHU 3325-3327) obtained were infested and colonized by fungi inside their bodies ( Fig. 4 A, B).

Head rounded with no constriction, lateral lips with small amphidial aperture. Stoma cylindrical; cheilostom not sclerotized, glottoid apparatus isomorphic, metastom with two warts. Pharyngeal corpus with muscular median bulb. Reproductive system amphidelphic; vulva transverse, located near midbody. Rectum short, 0.9–1.1 abd length. Tail conical, 6.0–7.3 abd length.

The specimens resemble Caenorhabditis ( Osche, 1952) Dougherty, 1953 in general features of the body.

Characters: a,b,c, de Man's ratios; V, position of vulva as a percentage of the body length from anterior end. * Value in ZIHU 3325 (L= 849).

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.

Tables

TABLE 2. Measurements (in µm) of Rhabditidae sp. 1 and Rhabditidae sp. 2.

	Rhabditidae sp. 1	Rhabditidae sp. 2
Characters	Range (n=3: ZIHU3325-3327)	ZIHU 3328
Body length (L)	849 –1035	1177
a	16.2–18.5	26.2
b	5.0 –6.2	5.8
c	5.7–7.1	4.0
V (%)	50.3 –52.6	43.6
Lip region diameter	8.4 –12.0	9.2
Stoma length	18 –20	22
Stoma diameter	2.0 –3.3	3.1
Pharynx length	166 –173	203
Body diameter at pharynx end	32 –41	37
Corpus length	98 –107	112
Nerve ring from anterior end	116*	108
Excretory pore from anterior end	124–130	137
Vulva from anterior end	427–544	513
Vulval body diameter (= mbd)	46–64	45
Rectum length	22–24	41
Anal body diameter (abd)	20–24	19
Tail length	144–149	291
Phasmid from level of anus	35–41	38