Description of two new Nematoda species of the genus Dorylaimopsis Ditlevsen, 1918 (Comesomatidae, Araeolaimida, Nematoda) from the Yellow Sea, China

Collection: Pensoft Publishers

Keywords: Biodiversity · Topics: Marine Biology and Ecology Research, Parasite Biology and Host Interactions, Marine and coastal ecosystems

Two new species of the genus Dorylaimopsis Ditlevsen, 1918 from the subtidal zone of the Yellow Sea are described and illustrated. Dorylaimopsis sinica sp. nov. is characterised by the lateral differentiation in the form of longitudinal rows of larger dots which consisting of three rows of dots in about the anterior 20% and posterior 20% of the total body length and two rows of dots in the rest portion of the body, by the multispiral amphidial fovea having three turns; slender, equal, arcuated spicules; cephalated proximal end with a short median cuticularised lamina; length 1.9–2.2 times the cloacal body diameter; gubernaculum with two geniculate curved apophyses and 14–17 papilliform precloacal supplements; and excretory pore posterior to nerve ring. Dorylaimopsis zhangi sp. nov. is characterised by having cephalic setae 6–7 μm long, amphidial fovea with three turns, lateral differentiation consisting of four longitudinal rows of larger dots in the pharyngeal and tail regions, three longitudinal rows of larger dots in the middle region of body, spicules slender and slightly curved, length 2.0–2.5 times the cloacal body diameter, and 18 small, pit-like precloacal supplements. An updated dichotomous key is provided for the 29 valid species of Dorylaimopsis.

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