Coynema, Rodriguez, Jans Morffe & Rodriguez, Nayla Garcia, 2011

Rodriguez, Jans Morffe & Rodriguez, Nayla Garcia, 2011, Coynema gen. n., a new genus of nematode (Thelastomatoidea, Hystrignathidae) parasites of Passalidae (Coleoptera) from Cuba, ZooKeys 75, pp. 9-19 : 11

Genus Coynema gen. n.

Generic diagnosis.

Female. Body robust, markedly fusiform. Cervical cuticle unarmed. Lateral alae present, from the esophageal region to a distance before the level of the vulva. Head bearing eight small, paired papillae. First cephalic annule slightly expanded, set-off from head by a deep single groove, its fore half with concave margins when totally relaxed. Esophagus consisting of a muscular sub-cylindrical procorpus, its base abruptly expanded in its joint with the short isthmus. Intestine simple, its fore region very expanded, forming a sac-like structure. The end of this region of the intestine is abruptly set-off and next to it the gut continues as a simple, rectilinear tube. Nerve ring encircling procorpus at its posterior half. Excretory pore post-bulbar. Reproductive system didelphic-amphidelphic. Eggs large, ovoid, smooth-shelled. Tail long, subulate and filiform.

Male. Body shorter and more slender than female. Cervical cuticle without spines. Head similar to female. First cephalic annule inconspicuous. Digestive system similar to female. Nerve ring encircling procorpus at its posterior half. Excretory pore post-bulbar. One testis present. Spicules absent. Tail conical, very short, sharply pointed, ventrally curved, its dorsal cuticle thickened forming a Y-like structure. A single, median, mammiform, big pre-cloacal papilla present. A pair of small, sub-dorsal, pre-cloacal papillae situated before the dorsal thickening.

Type species. Coynema poeyi (Coy, García & Alvarez, 1993) Morffe & García, comb. n. (monotypic genus).

Distribution.

Cuba.

Etymology.

The generic name is a combination of Coy, after Alberto Coy Otero, eminent Cuban parasitologist and the suffix -nema. The name is in neuter gender.