FIRST RECORD OF Cylindroiulus horvathi (DIPLOPODA, JULIDA, JULIDAE) IN SERBIA

Cylindroiulus horvathi (Verhoeff, 1897), found at a single locality in Vojvodina, north Serbia, is the third representativ e of the genus Cylindroiulus Verhoeff, 1894 in Serbian millipede fauna. Brief description and ecological aspects are given. Key to the Cylindroiulus species in Serbia and distribution map with incorp orated new data are also provided.


INTRODUCTION
Currently, the Serbian millipede fauna includes 101 species, belonging to 44 genera and 16 families of which Julidae, with 16 genera and 41 species, is the largest (ANTIĆ et al., 2013(ANTIĆ et al., , 2014)).Although the genus Cylindroiulus Verhoeff, 1894 includes about 100 species in Europe (Enghoff and Kime, 2013), only two of them were registered in Serbia up to now: Cylindroiulus boleti (C.L. Koch, 1847) and C. luridus (C.L. Koch, 1847) (ANTIĆ et al., 2013).C. horvathi (Verhoeff, 1897) is the third species of this genus and the 102.species of millipedes in Serbia.It belongs to the horvathi group of species, alongside Cylindroiulus abaligetanus Verhoeff, 1901 and C. cambio Korsós & Read, 1994.Similarities in external characteristics and in gonopod structure have been recognized (ATTEMS, 1903;VERHOEFF, 1905), which led to the establishment of the group.They are small animals, with a crenulated limbus and an indented apex of the gonopodal opisthomerite, separating the brachite from the solenomerite.Their distribution area extends from the middle Europe, Balkan Peninsula, Crimea, to northwest Russia (KORSÓS and READ, 1994).This paper represents the first report of C. horvathi in Serbia.

MATERIAL AND METHODS
Specimens were preserved in 70% ethanol and analyzed at the laboratories of the Institute of Zoology, University of Belgrade -Faculty of Biology.Examination of the whole specimens was done using a Carl Zeiss Stemi 2000-c binocular stereomicroscope with an AxioCamMRc camera and AxioVision Rel.4.2 program.For adult specimens, dimensions and numbers of body rings were determined.Photographs of the gonopods were prepared on Carl Zeiss Axioscope 40 microscope with Canon PowerShot A80 digital camera connected and processed through Zerene Stacker program.
To illustrate the distribution of the genus Cylindroiulus in Serbia we used the UTM notation system.The map records the presence of the species in 10 km squares of the UTM grid.The map (Fig. 4) records the presence of the species in 10 km squares of the UTM grid.

Distribution:
The distribution area of C. horvathi ranges from Poland in the north across Hungary and Romania to Bulgaria in the south.The eastern-most find of this species is in Crimea (KORSÓS and READ, 1994).Considering that this species has been reported in a few neighbouring countries, its presence in Serbia had been expected.
Ecology: This species is known to inhabit xeric environments such as dry grassland and steppe vegetation (KORSÓS and READ, 1994).These habitats are present in the northern part of Serbia, where the single known locality of this species is located.All three specimens were collected on a sunny day on the dry land on the shores of the lake.