ACTA ZOOLOGICA BULGARICA Systematics and Phylogenetics Acta zool. bulg., 68 (4), 2016: 483-490 Research Article Description of Ozyptila balcanica sp. n. from the Balkan Peninsula and its Comparison with the closely related O. umbraculorum Simon, 1932 (Araneae: Thomisidae) Christo Deltshev1, Gergin Blagoev2, Marjan Komnenov3 & Stoyan Lazarov1 1 National Museum of Natural History, Bulgarian Academy of Sciences, Sofia, Bulgaria; E-mail:
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[email protected] 2 Centre for Biodiversity Genomics, University of Guelph, Guelph, Canada; E-mail:
[email protected] 3 Macedonian Museum of Natural History, Skopje, FYR Macedonia; E-mail:
[email protected] Abstract: Ozyptila balcanica sp. n. is described (based on both males and females) from Bulgaria (Zemen Gorge), Greece (Arkadia, Mainalo) and FYR Macedonia (Skopje Region, Osogovo Mts.). The new species re- sembles the poorly known O. umbraculorum Simon, 1932, recorded from France, Portugal and Spain, but is clearly a distinct species. Illustrations of both taxa are presented. Due to the isolated position of both species in the genus, we proposed a new species group – umbraculorum, characterised by a large inter- mediate apophysis (ITA), armed with well-developed teeth, and a long scimitar-shaped tegular apophysis. The females have similar epigynes with pan-shaped median septum. Key words: Description, comparison, Ozyptila, umbraculorum species group Introduction The crab spiders of the genus Ozyptila Simon, 1864 the text shows that he had female specimens. Later, are common in a range of ground habitats such as URONES (1985) and JIMÉNEZ -VALVER D E (2002) pre- moss, detritus and leaf litter. Currently, the genus in- sented new illustrations of female and male, respec- cludes 103 species and five subspecies, 16 of which tively, of O.