Udonchus Cobb, 1913

Holovachov, Oleksandr, 2019, Campydoroides manautei gen. et sp. nov. from New Caledonia and a reappraisal of the suborder Campydorina (Nematoda), European Journal of Taxonomy 518, pp. 1-23 : 15

Genus Udonchus Cobb, 1913

Monochromadora Schneider, 1937: 69 .

Diagnosis (based on Eyualem & Coomans (1996) and Tahseen et al. (2012))

Cuticle transversely striated. Lateral alae, body pores and epidermal glands absent. Somatic sensilla absent. Labial region truncated, lips fused. Six inner labial papilliform sensilla, located on anterior surface of lips. Six outer labial papilliform sensilla, located on periphery of labial region. Four cephalic papilliform sensilla, located short distance behind lip region. Amphid stirrup-shaped with transverse slit-like opening. Stoma tubular, cheilostom with 12 rugae, stegostom with cuticularised walls and three denticles (dorsal and ventral in anterior and left lateral in posterior parts of stoma). Pharynx cylindrical anteriorly, with distinct basal bulb; valves absent. Cardia conoid, not embedded into intestinal tissue. Secretory-excretory system absent. Female reproductive system monodelphic prodelphic, ovary branch reflexed antidromously. Vulva a transverse slit. Vagina oblique, without pars refringens vaginae or epiptygmata. Spermatheca absent. Male reproductive system unknown. Tail elongate. Caudal glands and spinneret present.

Type species

Udonchus tenuicaudatus Cobb, 1913 .

syn. Chromadora monohystera Micoletzky, 1915 .

syn. Udonchus monohystera (Micoletzky, 1915) .

syn. Monochromadora monohystera tenuiformis Koniar, 1955 .

syn. Udonchus monhystera tenuiformis (Koniar, 1955) .

syn. Monochromadora monhysteroides Schneider, 1937 .

syn. Monochromadora monhysteroides longicaudata Schneider, 1937 .

Included species

Udonchus crassicauda (Schneider, 1937) Schiemer, 1978 .

syn. Monochromadora crassicauda Schneider, 1937 .

Udonchus merhatibebi Eyualem & Coomans, 1996 .