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Issue: Vol. 5369 No. 2: 9 Nov. 2023
Type: Article
Published: 2023-11-09
DOI: 10.11646/zootaxa.5369.2.5
Page range: 255-268
Abstract views: 166
PDF downloaded: 11

Two new species of Xyalidae Chitwood, 1951 (Nematoda, Monhysterida) from Chinese Sea Area

College of Life Sciences; Liaocheng University; Liaocheng 252059; P. R. China
College of Life Sciences; Liaocheng University; Liaocheng 252059; P. R. China
College of Life Sciences; Liaocheng University; Liaocheng 252059; P. R. China
Nematoda Daptonema sinica sp. nov. Metadesmolaimus bulbosus sp. nov. biodiversity free-living marine nematode taxonomy

Abstract

Two new nematode species of the family Xyalidae were found in the intertidal zone of the Chinese coast, and they are described here as Daptonema sinica sp. nov. and Metadesmolaimus bulbosus sp. nov. Daptonema sinica sp. nov. is characterised by a relatively large body with a broad funnel-shaped buccal cavity; relatively long cephalic setae; a circular amphidial fovea posterior to the buccal cavity; slender spicules bending into a hook shape in the posterior half; a small plate-like gubernaculum without apophysis; and a conico-cylindrical slender tail with terminal setae. Metadesmolaimus bulbosus sp. nov. can be identified by its large buccal cavity, long cervical setae, multiple bulb-like pharyngeal muscular swellings, conico-cylindrical tail narrowing abruptly immediately posterior to the cloaca, straight clavated spicules with a broad proximal end and hooked distal end, and gubernaculum absent. An updated dichotomous key to the species of Metadesmolaimus is given.

 

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