Molgolaimus haakonmosbiensis Portnova, 2009, sp. n.

• Main Author: Portnova, Daria
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Adenophorea; Desmodorida; Microlaimidae; Molgolaimus; Molgolaimus haakonmosbiensis; Norwegian Sea
• Online Access: https://doi.org/10.5281/zenodo.5334154; http://treatment.plazi.org/id/03A987833D3877199CEB1B40CCE102E1

Molgolaimus haakonmosbiensis sp. n. Figures 4, Table 5 Type material: five males, three females. Glycerine slides. Holotype: male in glycerin slide No. D-1/18–1. Paratypes: males, nos. from D-1/18 to D-1/20; females, nos. from D-1/19 to D-1/21. Type locality: Norwegian Sea, Håkon Mosby Mud Volcano, stations 283A, 283B. Sediment from the pogonophoran fields. Etymology: referring to the Håkon Mosby Mud Volcano. stated, except ratios a, b, c, c’, l.tail/c, spic/abd, L/spic.arch, l.tail/spic.arch/a.b.d.). Description: Body short, cylindrical. Cuticle finely striated, striation especially visible on the tail. Cuticle thickens at the head. Head small and wide, separated from body by small narrowing before head setae. Inner and outer labial sensilla indistinct. Four cephalic setae 3–4 µm long, arranged slightly over the cephalic constriction. Amphidial fovea circular, distinctly sclerotized, 5–6 µm in diameter (45–50 % of c.b.d.). Distance from apex to anterior border of amphidial fovea 10–11 µm, identical for males and females. No somatic setae along the body. Stoma small, very narrow, weakly sclerotized, without teeth. Oesophagus narrow, cylindrical, and muscular along its entire length, posteriorly forming a pronounced spherical bulb. Diameter of the bulb 20 µm. Intestine gleam well looked through. Cardia small and extended. Glandular body of the renetta cell porrect, lies below cardia at the ventral side of the body. Excretory pore located between the nervous ring and bulb. Male reproductive system monorchic. Outstretched testis situated to the left of intestine. Vas deferens long and thin. Spermatozoa oval and trapezium-shape filling the testes very dense. Spicules short, thin, flexuous, ventrally bent, with dilated and excurved proximal parts. Length of spicules 30.5 µm (arch), and 24.4 µm (chord). Relation of spicules length vs. a.b.d. 1.32–1.45. Gubernaculum with thin, long, claw–like, hamose front apophysis. Length of apophysis 12.2 µm. The two precloacal papilla formed supplements with short terminal setae ...