Euleptarthrus Jakobson, 1908

Wu, Jie & Zhou, Hong-Zhang, 2013, Taxonomy of the subgenus Euleptarthrus Jakobson (Coleoptera, Staphylinidae, Osoriinae, Priochirus) of China with descriptions of three new species, Zootaxa 3613 (2), pp. 165-175 : 166

Euleptarthrus Jakobson, 1908

Euleptarthrus Jakobson, 1908: 466 (subgenus of Priochirus ; replacement name for Leptarthrus Bernhauer, 1903 (nec Stephens, 1829); type species: Leptochirus longicornis Fauvel, 1864 , fixed by objective synonymy with Leptarthrus , which had its type species fixed by monotypy); Wu & Zhou, 2007: 74, 76–80, 89 (phylogeny, excluding the japonicus - group).

Leptarthrus Bernhauer, 1903: 141 , 159 (subgenus of Priochirus ; nec Stephens, 1829).

Neoleptarthrus Scheerpeltz, 1933: 1004 (subgenus of Priochirus ; replacement name for Leptarthrus Bernhauer ).

Additional references: see Herman (2001)

Diagnosis. Most species of Euleptarthrus can be distinguished from the other subgenera of Priochirus by the shape of two pairs of lateral teeth on head: the inner lateral teeth blunt or triangularly convex, the outer lateral teeth rounded or weakly pointed. Only in three species, P. (E.) malayanus, P. (E.) oxygonus and P. (E.) trifurcus , both the inner and outer lateral teeth are well developed and distinctly pointed. However, in all known Euleptarthrus species, the inner lateral teeth are distinctly shorter than, or at most as long as the outer lateral teeth. Besides cephalic teeth, Euleptarthrus species also share the following three characters: the frontal angle of head broadly convex, the median sulcus of head narrowed posteriorly with its lateral margins fused or almost fused at posterior end, lateral depression between the inner and outer lateral teeth is distinct. An additional character (two closely located pairs of long setae in the center of clypeus) is shared by all Euleptarthrus species except P. (E.) trifurcus , in which the two pairs of setae are widely separated.