Additional records of Japanese species of the genus Robertus (Araneae: Theridiidae), with removal of a species as a junior synonym of Leptorhoptrum robustum (Linyphiidae)

Abstract

Collecting data newly obtained of two Japanese species belonging to the family Theridiidae, Robertus nojimai Yoshida 2002 and R. ogatai Yoshida 1995, are presented. Robertus yasudai Yoshida 2001 is newly synonymized with Leptorhoptrum robustum (Westring 1851) belonging to Linyphiidae.