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A new endemic pseudoscorpion species from the Jama Pit nr. Daorson, Stolac, Southeastern Bosnia and Herzegovina, is presented, thoroughly described and illustrated. It is named Chthonius (Globochthonius) daorsoni n. sp. Its main morphometric characters and important diagnostic features are analyzed and compared to those of its phenetically and phylogenetically closest congeners.

Five years ago, Ćurčić et al. (2008) described two new pseudoscorpions: Roncus diocletiani Ćurčić, Dimitrijević and Rađa (from Croatia) and R. orjensis Ćurčić, Dimitrijević and Rađa (from Montenegro). The pseudoscorpions studied were mounted on slides with gum-chloral medium. They are deposited in the collection of the Institute of Zoology, Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia and in the collection of the Natural History Museum, 21000 Split, Croatia. It has been shown that only the male of R. diocletiani belongs to the nominal species, while the female of the same taxon belongs to Archaeoroncus tenuis (Hadži). Therefore, the “allotype male” of R. diocletiani is actually a holotype of this species, while the “holotype” of R. diocletiani becomes a paratype of A. tenuis. [Projekat Ministarstva nauke Republike Srbije, br. 173038]

The pseudoscorpion sample discovered under a stone in Dalmatia (Croatia) was studied. A new species is described herein: Chthonius (Chthonius) makirina n. sp. This taxon is considered endemic to Dalmatia and the Balkan Peninsula. Along these lines, the diagnostic characters of the analyzed species are thoroughly described and figured. Taxonomic interrelationship and geographic distribution are briefly discussed.

An analysis of the pseudoscorpion material from Croatia has supported the elevation of two taxa to full species rank: Chthonius (Chthonius) pagus n. sp. and Roncus navalia n. sp., both from Dalmatia; Croatia. Most diagnostic characters of the analyzed species are thoroughly described or figured. Some taxonomic interrelationships and features of geographic distribution have also been briefly discussed. Both studied taxa, which currently inhabit a cave on the Island of Pag in Dalmatia (Croatia), are probably endemics and relics of the Tertiary period. [Projekat Ministarstva nauke Republike Srbije, br. 173038]

The pseudoscorpion sample from a cave in Bosnia has been studied. Two new species have been described herein: Chthonius (Chthonius) protobosniacus n. sp. and C. (C.) kladanjensis n. sp. Both taxa are considered endemic of Bosnia and the Balkan Peninsula. In this paper, diagnostic characters of the analyzed forms are thoroughly described and figured. Taxonomic interrelationship amd geographic distribution are briefly discussed.

A new species of epigean pseudoscorpion pertaining to the genus Chthonius C. L. Koch 1843 from Macedonia is erected. Its relationship to phenetically close congeners is briefly discussed. The new species, Chthonius (Ephippiochthonius) lagadini n. sp. is a relict form presently known only from its type locality (Lagadin, nr. Ohrid, Macedonia).

A new pseudoscorpion from the family Chthoniidae - Chthonius (Chthonius) aquasanctae n. sp. from west Serbia is described. The newly erected taxon is endemic to the area studied. Its taxonomic relationship to its phenetically close congeners Chthonius (Chthonius) lesnik Ćurčić and Chthonius (Chthonius) iugoslavicus Ćurčić, as well as the comparative morphological traits, are described in detail.

A new cave-dwelling pseudoscorpion from the Badanj (or Vilišnica) Cave, nr. Sveti Filip i Jakov, Dalmatia (Croatia) is thoroughly described and illustrated. Its main morphometric characteristics and important diagnostic traits are analyzed and compared to those of its phenetically close congener Chthonius (Chthonius) absoloni Beier from Dalmatia. The new species is relict and endemic to the area studied.

Two new epigean pseudoscorpion species belonging to the family Chthoniidae - Chthonius (Ephippiochthonius) metohicus n. sp. and Chthonius (Ephippiochthonius) civitatisveti n. sp. from the UN Administered Province of Kosovo and Southern Croatia, respectively, are described. The newly erected taxa are endemic to each of the areas studied. Their taxonomic relationship with their phenetically close congeners Chthonius (Ephippiochthonius) bidentatus Beier, 1939, Chthonius (Ephippiochthonius) kemza Ćurčić, Lee et Makarov, 1993 and Chthonius (Ephippiochthonius) tetrachelatus (Preyssler, 1790) and comparative morphological traits are described.

Two new endemic cave pseudoscorpion species from the Petropavlova Pećina Cave, village Bihovi, 6 km from Trebinje, Herzegovina, are presented, thoroughly described and illustrated. These are named Chthonius (Globochthonius) petroupauli n. sp. and Roncus paulipetrou n. sp. Their main morphometric characteristics and important diagnostic features are analyzed and compared to those of their phylogenetically closest congeners.

A new species of the endemic pseudoscorpion genus Protoneobisium Ćurčić, 1988, P. basilice sp. n. from Croatia has been found, described and diagnosed. From its phenetically close congener, P. biocovense (Müller, 1931), the new taxon differs in many respects of both qualitative and quantitative nature. Both species of Protoneobisium have a limited distribution; they inhabit Mt. Biokovo, Croatia, and are probably the remnants of some ancient Maditerranean fauna of pre-Tertiary origin.