Chiloplacus saccatus A.L O O F 1971, n.sp.

• Main Author: P. A. A. LOOF
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 1971
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Chromadorea; Rhabditida; Cephalobidae; Chiloplacus; Chiloplacus saccatus; Spitzbergen
• Online Access: https://doi.org/10.5281/zenodo.8152816; http://treatment.plazi.org/id/03C67B2BB40BFFF6FF7FFC6EFD563CC4

Chiloplacus saccatus n.sp. (Fig. 3, A -C). Syn. C.quadricarinatus apud van Rossen & Loof, 1962; Nee C.quadricarinatus (Thorne, 1925) Thorne, 1937; C.quadricarinatus apud Loof, 1964. Dimensions: Females (n = 34): L = 0.56 -0.83 mm; a = 20-28; b = 3.5 -4.4; c = 16-20; V = 64- 68; G prevulvar = 13-20; G postvulvar = 13 -22; G2 = 8 -13. Female, holotype: L = 0.74 mm; a = 22; b = 4.1; c = 20; V = 67; G prevulvar = 16; G postvulvar = 17; G2 = 11. Male not found. Body almost straight in death except for a slight bend ventrad in the vulvar region. Cuticular annulation distinct, 2.4 \x in mid-body, 2 \i in anterior part of neck. Lateral field with four wings (five longitudinal grooves). Prelabial probolae bifurcate over one-third of their length. Edges oflips somewhat sclerotized, but true labial probolae appear not to be present. Corpus of oesophagus cylindrical, 3.4-4.4 x as long as isthmus. Nerve ring surrounding the corpus-isthmus junction. Deirids conspicuous, located at 75 -83 % of neck length from the head end, always posterior to the corpus-isthmus junction. Isthmus slender, 29 -35 \i long. Terminal bulb measuring 17 -21 X 13 -16 JJL, with valves. Hemizonid two annules long, opposite or slightly behind corpus-isthmus junction. Excretory pore immediately anterior to hemizonid. Vulva with protruding, large, asymmetricallips.Gonadcephaloboid,inmost specimens with double postvulvar flexure. No sperm.Rudimentofsecondgonad large, 69 -87 (x or 30-45 % of vulva-anus distance. Tail sub-cylindroid with broadly rounded or somewhat truncate terminus which usuallyisindentedin the middle. Number of tail annules 14-18. Taillength 1. 9-2.6 analbodywidths. The phasmids open at 52- 69% of tail length. Holotype: Female on slide WT 1180. Paratypes: 27 females (two with end-on view of head) on slides WT 1181-1196; six females deposited with Dr.Morgan Golden, Beltsville, Maryland, U. S.A. Type habitat and locality: Sample 70. This species is very widespread on Spitzbergen; it was found also in samples 1, 2, 3, 4, 5, 6, 8, 17, 18, ...