Tylencholaimus gallaicussp. n. (Dorylaimida, Tylencholaimidae) from Galizia, NW Iberian Peninsula

摘要

A new dorylaimid species, Tylencholaimus gallaicus sp. n., is described and illustrated, including LM and SEM pictures, from NW Iberian Peninsula. It is characterized by its very small body (L = 0.30-0.46), lip region rather rounded and lacking perioral disc, odontostyle 5-6 mu rn long or shorter than lip region width, anterior region of the pharynx weakly muscular and extending abruptly, pharyngeal expansion occupying one-third to two-fifths of total neck length, female genital system monodelphic-prodelphic, vulva posterior (V=60-67), tail conical and slightly ventrad curved (20-28 mu m, c=12-19, c'=1.6-2.4), spicules 18 mu m long and four ventromedian supplements. The new species is very close to T. minutus Vinciguerra, 1986, but it can be separated from this in having rounded shape of lip region (vs typical cap-like) lacking perioral differentiation (vs inner region of lips distinctly separated from the rest, with disc-like appearance under LM), more anterior vulva (vs V=67-73), longer tail (vs0=19-27), and four ventromedian supplements (vs two).