Two original scientific papers are published in journal Natura Croatica Vol 19. No. 1. 2010 with the description of one new genus and three new species of cave beetles (Coleoptera). Two species are described from genus Machaerites, from caves Donja Baraćeva špilja Rakovica, Nova Kršlja (Machaerites pavleki) and cave Špilja pod Zimzelom, Potok Musulinski, Gorski Kotar (Machaerites marjanci). New genus and species is described from cave Dumenčića špilja, Slunj, Rakovica (Jalzicaphaenops poljaki). Maps of caves are also presented in papers. New species are collected during biospeleological exploration conducted by Croatian Biospeleological Society and Croatian Natural History Museum. New species are known so far only from their type localites and represent new endemics of Croatian caves.
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Hlavač, P. & Jalžić B., 2010: Endogean and cavernicolous Coleoptera of the Balkans. X. Two new species of Machaerites (Coleoptera: Staphylinidae: Pselaphinae) from Croatia. Nat. Croat. 19 (1), 111-119.
Machaerites pavleki sp. nov. and M. marjanaci sp. nov., new cavernicolous species of the tribe Bythinini are described from Croatia. The catalogue of all species of the genus placed in two species-groups is provided.
Two new genera of cave-dwelling aphaenopsoid Trechini beetles, Jalzicaphaenops gen. nov. poljaki sp. nov. from Dumenčića špilja (cave) near Rakovica (central Croatia) and Acheroniotes gen. nov. mlejneki sp. nov. from pits on Prekornica mountain range (central Montenegro) are described and illustrated. Both new genera are characterized by the presence of posterior pronotal setae, Jalzicaphaenops gen. nov. also by the presence of a pair of setae on pronotal disc. The key to the identification of all hitherto known aphaenopsoid Trechini genera from Dinarids is given. Data on the distribution and ecology of these remarkable genera, complemented with descriptions of the type localities are also provided.