Abstract
Abstract In males of several Uruguayan lycosid species of the genera Lycosa, Schizocosa, Aglaoctenus and Allocosa, we used Scanning Electron Microscopy to investigate the existence and the morphology of pedipalpal stridulatory-like structures. These kinds of structures only appeared in species belonging to the subfamily Lycosinae, and representatives of the Allocosinae and Sosippinae subfamilies lacked them altogether. Unlike European Lycosa species, all surveyed Uruguayan species of the genus Lycosa presented the character to some extent, but interspecific differences occurred in the relative size and development of the structure. Lycosa thorelli, L. carbonelli and Lycosa sp. showed a very well developed pedipalpal structure, which was smaller in Lycosa poliostoma. Schizocosa malitiosa also exhibited an only partially developed structure. A possible role of these pedipalpal stridulatory-like structures in lycosid systematics is discussed. RESUMEN. Mediante Microscopia Electronica de Barrido, hemos analiz...
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