Insights on vulval morphology in Ochyroceratinae with a rediagnosisof the subfamily and description of the first Argentinean species(Araneae: Synspermiata: Ochyroceratidae)

ABEL PÉREZ-GONZÁLEZ; RUBIO GONZALO; RAMÍREZ MARTÍN

ZOOLOGISCHER ANZEIGER

ELSEVIER GMBH

Año: 2015 vol. 260 p. 33 - 44

0044-5231

We examine the internal morphology of the female genitalia of representatives of the three subfamilies ofthe spider family Ochyroceratidae (Ochyroceratinae, Psilodercinae and Theotiminae) by means of scan-ning electron microscope. Ochyroceratines have the uterus externus constricted into a narrow neck atits connection with the uterus internus, which, after comparison with other spider families, is proposedas a synapomorphy of the subfamily. We describe Ochyrocera diablo sp. nov. from Misiones province innortheastern Argentina. The measurements of their eggs and uterus externus indicate that the eggs musts queeze through a small duct 40 times smaller in diameter. We also propose that another synapomorphyfor Ochyroceratinae is the insertion of the male palpal copulatory organ in a projecting pedestal at thebase of the cymbium, and update the differential diagnosis of the subfamily. Finally, we recognize that Psilodercinae Deeleman-Reinhold, 1995 is a junior objective synonym and homonym of PsilodercinaeMachado, 1951.