Prochaetosoma marisalbi Fedyaeva, Neretina, Konovalova & Tchesunov, 2016, sp. n.

• Main Authors: Fedyaeva, Maria A., Neretina, Tatjana V., Konovalova, Olga P., Tchesunov, Alexei V.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Adenophorea; Desmodorida; Draconematidae; Prochaetosoma; Prochaetosoma marisalbi; karelia*; karelian; White Sea
• Online Access: https://doi.org/10.5281/zenodo.5628349; http://treatment.plazi.org/id/03F17E4CFF84FFDEFF30F989FCB05D55

Prochaetosoma marisalbi sp. n. Figs 4–6, Table 3 (morphometrics) Material. Holotype male, six paratype males, seven paratype females. The type specimens are deposited in Senckenberg Institute, Frankfurt am Main (Germany), inventory numbers SMF 17047 (holotype) and SMF 17048– 17054 (paratypes). Type locality. White Sea (Northern Russia), Karelian Coast of the Kandalaksha Bay, vicinity of the White Sea Biological Station (66°33'N, 33°06'E), Velikaja Salma Strait between the Veliky Island and Kindo Peninsula, depth 2–5 m, red algae. 18–27 August 2013. Description. Body elongate and generally slim. Pharyngeal region slightly swollen, rest of body almost cylindrical in males and elongate spindle-shaped in females (swollen in area of gonads). Curvature of the body of fixed specimens rather variable. Rostrum (or cephalic capsule, anteriormost area with non-annulated cuticle) rounded anteriorly. Body cuticle annulation conspicuous and without ornamentations. Cuticular annulations of the pharyngeal region wider than those of rest of the body. Tail cuticle annulated except for terminal cone. Mouth opening surrounded with six triangular lips and then with zone of rugose (crumpled) cuticle (Fig. 6 D). Inner labial papillae on the lip bases; outer labial papillae on the periphery of the rugose zone. Four cephalic setae rooted at the level of anterior margin of the amphideal fovea. Length of the cephalic setae 6.3–9.0 µ m in males and 6.0–9.0 µ m in females. Amphideal foveas spirally coiled in 1.5 turns in males and females, 0.7–1.0 µ m wide in males and 0.6–1.4 µ m wide in females. Numerous somatic setae (about 260–280) along the body. Longest somatic setae (34-49 µ m in males and 32-52 µ m in females) located on pharyngeal region. Somatic setae in intestinal region of the body reach 26–45 µ m in length in males and 37–49 µ m in females with shorter setae 5.0–9.4 µ m in males and 3.5–9.0 µ m in females. One or two long subdorsal and several short latero-ventral setae on each side of the tail, 23–33 µ m long in males and ...