A trigonotarbid arachnid referable to Anthracomartus voelkelianus Karsch, 1882 is described from the Late Carboniferous (Moscovian) (= Westphalian C) of Jerusalemsberg near Dobšiná in eastern Slovakia. This record is significant as both the first fossil arachnid formally described from Slovakia and, whilst it does not come from a classic Coal Measures locality with a terrestrial palaeoenvironment, the sediments were deposited in a marine—deltaic environment typical for arachnid fossils. An overview of the distribution of the 17 currently recognized species of Anthracomartidae is presented.