Nuevos datos sobre monónquidos (Nematoda: Enoplea: Mononchida) en Venezuela.

Abstract

These notes provide biometric data of a new population of Clarkus papillatus and the species: Iotonchus clarki and Mulveyellus monhystera are recorded for the first time in the Venezuelan nematofauna. C. papillatus females were characterized by having a medium body size (L = 0.96-1.2 mm and biomass = 0.9-1.9 μg), J-shape after fixed; medium-sized dorsal tooth, located in the anterior half of the oral cavity, apex located 79-89.4% from the base of the stoma; b = 3.4-3.8, c = 15.2-18.8; vulva transverse and post-equatorial (V = 62.4-67%), two drop-shaped cuticularized pieces (pars refrigens vaginae); tail arched ventrally, caudal glands and spinneret absent. I. clarki females had a cylindrical body (L = 1.57-1.88 mm and biomass = 3.1-4.5 μg), ventrally curved and J-shaped after fixed; barrel-shaped oral cavity, vertical plates (ventral and dorsal) slightly arched, small dorsal tooth located near the base of the stoma (in suprabasal position), with apex located 20-25.7% from said base; b = 5.1-5.3, c = 5.5-5.7; transverse and postequatorial vulva (V = 53.6-57.3%); tail long and filiform, curved ventrally, caudal glands and spinneret not patent or absent. While the females of M. monhystera were characterized by having a ventrally curved body, J or C-shape after fixed (L = 1-1.29 mm and biomass = 1.33-2, 49 μg); small dorsal tooth, with apex located 59.1-70.6% from the base of the stoma; b = 3.6-4.3; c = 17.4-24.8; postequatorial vulva (V = 74.2-80.7%); conoid tail curved ventrally with rounded terminus. Finally, a brief biometric compendium of the species of the order Mononchida reported in the country to date is also presented.