A new and a known species of the genus Chrysonema Thorne, 1929 (Nematoda: Dorylaimida) from Costa Rica

W. Ahmad, A. Shaheen

Abstract


A new and a known species of the genus Chrysonema Thorne, 1929 are described and illustrated from Costa Rica. Chrysonema inbionis sp. n. is characterized by having a 1.43-1.58 mm long, slender body, continuous lip region with amalgamated lips, slender odontostyle, comparatively anterior vulva, amphidelphic female reproductive system, and elongate ventrally arcuate tail. Chrysonema attenuatum (De Man, 1880) Loof, 1994, a rare species, is re-described based on a single female and a male specimen collected from Costa Rica.

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