Ocnerodrilidae, James & Divina, 2012

James, Samuel W. & Divina, Gildas Brice, 2012, Earthworms (Clitellata: Acanthodrilidae, Almidae, Eudrilidae, Glossoscolecidae, Ocnerodrilidae) of the coastal region of Gamba, Ogooué-Maritime Province, southwestern Gabon, Zootaxa 3458, pp. 133-148 : 145-146

Ocnerodrilidae gen. nov.?

Material. USNM 1180248 , semi-clitellates and juveniles, banks and riparian area of small stream inland near large antenna, Gamba Complex , Gabon, 2.84873S, 10.23569E, 22 m asl., 16 May 2008; S. James, G. Divina, G. Moussavou and L. Tchignoumba, colls .

Description. Unpigmented, slender; paired prostatic pores XVII on large porophores; no dorsal pores; female pores near B in XIV. Septa 5/6–8/9 muscular, other septa membranous; esophageal gizzards in VI, VII; intestinal gizzard in XII, intestinal origin XIII, typhlosole lacking. Sub-esophageal glands paired in IX, ental portion with outer wall composed of fine parallel tubules around central lumen filled with white material; ectal portion with large central lumen filled with white material. Last hearts in XI; longitudinal blood vessel in ventral wall of intestine, separate from ventral vessel. Holandric, tubular prostates with short muscular ducts paired in XVII, lying parallel to nerve cord XVII–XXII. Spermathecae clavate, adiverticulate in IX.

Remarks. The closest genus seems to be Nematogenia Eisen , but this holandric material lacks dorsal pores and has an intestinal gizzard, which are respectively present and absent from metandric Nematogenia. South American Xibaro Righi is about as similar. More importantly, the intestinal gizzard is a feature previously unknown in Ocnerodrilidae . This material clearly does not belong to any known taxon in the family.