Actinonema pachydermatum Cobb, 1920

Sivaleela, Gunasekaran, Surendar, Chandra & Kumar, Rubavath Rajendar, 2021, Free-living marine nematodes in Andhra Pradesh Coast, India, Records of the Zoological Survey of India 121 (2), pp. 283-301 : 287

8. Actinonema pachydermatum Cobb, 1920 *

(Figure 4A-C)

1920. Actinonema pachydermatum Cobb. Contributions to a science of nematology, 9: 339.

Material examined: Male, 1♂, (Reg. No. N. 352), Hope Island Date, 2.iv.2016, Coll. G. Sivaleela.

Diagnostic characters: This species distinguished by the presence of oval amphid with a double contour, L- shaped curved spicules.

Description: Body length 0.7 mm. Maximum diameter of body is 29 µm. Cuticle ornamentation heterogeneous and complex. Amphid about 0.7 c.d wide. Oesophagus with posterior bulb. Tail conical pointed tip about 5 a.b.d. Spicules telamons. Ventral enlarged annules extend about 7 a.b.d anterior to cloaca.

Distribution: Continental shelf of eastern Arabian Sea ( Sajan and Damodaran, 2007); Continental slope of Bay of Bengal (Mani, 2008). Elsewhere: North-east England, Northumberland coast.

Remarks: This species is closely related to the earlier description of Platt & Warwick (1983) by its oval-shaped amphids and differs in the cuticle from other species, so this species placed as A. pachydermatum