Nematodes of the order Rhabditida from Andalucía Oriental, Spain. The genus Acrobeles von Linstow, 1877 with description of A. andalusicus sp. n. and a key to species

Abstract

A new species of the genus Acrobeles von Linstow, 1977 is described from natural areas in SE Iberian Peninsula. A. andalusicus sp. n. is characterized by having body 853-922 mm long in females and 789-954 mm in males, cuticle “single”, annuli with one row of intracuticular punctations, lateral field with three incisures, labial probolae 13-18 mm long, pharyngeal corpus slightly fusiform and 3.6-5.0 times isthmus length, postuterine sac 31-37 mm or 0.6-0.8 times as long as body diameter and bearing bigger cells at its proximal part, vagina 14-18 mm and differentiated in two sections, female tail conical (72-81 mm, c=11.0-11.8, c’=2.1-2.5) with terminus bearing a conical mucro without annuli, male tail conical and ventrally curved (60-82 mm, c=11.6-14.0, c’=1.8-2.1) with acute mucro, spicules 55-68 mm long, and gubernaculum 28-32 mm long. In addition, Andalusian populations of other four previously known and one unidentified species are studied: A. ciliatus, A. complexus, A. cylindricus, A. singulus and Acrobeles sp. Descriptions, measurements and illustrations, including SEM photographs, are provided for the six species. Finally, a key to species belonging to the genus Acrobeles is also provided.