NORTH-WESTERN JOURNAL OF ZOOLOGY 11 (Supplement 1): S1-S106 ©NwjZ, Oradea, Romania, 2015 Article No.: e150301 http://biozoojournals.ro/nwjz/index.html Trachelipus species (Crustacea, Isopoda, Oniscidea) in Romanian fauna: morphology, ecology, and geographic distribution Nicolae TOMESCU1*, Lucian Alexandru TEODOR1, Sára FERENȚI2, 3 and Severus-Daniel COVACIU-MARCOV2 1. “Babeş-Bolyai” University, Faculty of Biology and Geology, Department of Biology, Gheorghe Bilaşcu (Republicii) str. 44; 400015 Cluj-Napoca, Romania. 2. University of Oradea, Faculty of Sciences, Department of Biology, Universității str. 1, 410087 Oradea, Romania. 3. “Iosif Vulcan” National College, Jean Calvin str. 3, Oradea, Romania. *Corresponding author`s e-mail:
[email protected] Received: 12. September 2014 / Accepted: 10. March 2015 / Available online: 15. December 2015 / Printed: December 2015 Abstract. Specific morphological characters are re-described in 12 species of Trachelipus genus, found in Romanian fauna: T. trilobatus (Stein, 1859), T. ater (Budde-Lund, 1896), T. varae (Radu, 1949), T. ratzeburgii (Brandt, 1833), T. bujori (Radu, 1950), T. difficilis (Radu, 1950), T. affinis (Koch, 1841) = T. wächtleri (Strouhal, 1851), T. arcuatus (Budde-Lund, 1885), T. rathkii (Brandt, 1833), T. pleonglandulatus (Radu, 1950), T. nodulosus (Koch, 1838), T. squamuliger (Verhoeff, 1907). Descriptions are illustrated with figures for all characters. The species, which were synonymised in the past, are described comparatively (T. varae and T. ater, T. bujori and T. ratzeburgii, T. difficilis and T. affinis = T. wächtleri, T. pleonglandulatus and T. rathkii). The comparative descriptions emphasize that the synonymised species are valid. The variations of some morphological characters and morphological anomalies observed on the studied specimens are noted in each species.