Rhynchonema cinctum 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 : 298-299

39. Rhynchonema cinctum Cobb, 1920 *

( Figure 20 A-C)

1920. Rhynchonema cinctum Cobb, Cont. Sci. of Nemat: 9: 260.

Material examined: 1♀ (Reg. No. N-356), Tummelapenta,

7.iv.2016, Coll. G. Sivaleela.

Diagnostic characters: The species is characterized by the presence of cuticle is coarsely annulated, and buccal cavity is elongated; anterior third of oesophagus region is attenuated; amphid is posterior to attenuated section.

Description The total body length is 0.85 mm. Cuticle coarsely ringed. Head diameter is 5 µm. Oesophagus is 3 µm. Buccal cavity is cylindrical 60 µm long extend up to amphid. Ten cephalic and four cervical setae are visible. Amphid is circular 4 µm wide. Somatic setae 10-15 µm long. Tail conical and setose.

Distribution: Continental shelf of eastern Arabian Sea ( Sajan & Damodaran, 2007); Continental slope of Bay of Bengal (Mani, 2008). Elsewhere: Peru, Atlantic and Pacific Ocean

Remarks: This specimen agrees well with the earlier description of Cobb (1920) by its total body length, cuticular structure and tail length.

Figures

Figure 20 Paracanthonchus heterodontus.