Lasius transylvanicus

This taxon is considered to be unidentifiable and its identity is uncertain. Rözsler claimed to have made intensive observations of nest construction and behavior of this ant in the floodplain of the Nyarad river, Romania. The morphological description reports a dense and erect scape pilosity as in Lasius niger in combination with complete absence of setae on legs as found in Lasius alienus. I have never seen such an ant in thousands of Palaearctic Lasius samples. The description of behavior also indicates involvement of fantasy, invention or cognitive failure (Seifert, 2020).

Distribution based on type material
Romania.

Nomenclature

 * . Lasius transylvanica Röszler, 1943: 44 (w.q.m.) ROMANIA.
 * Status as species: Stärcke, 1944a: 157 (in key).
 * Junior synonym of niger: Wilson, 1955a: 60; Smith, D.R. 1979: 1436; Bolton, 1995b: 226.
 * Junior synonym of alienus: Gallé, et al. 1998: 217.
 * Unidentifiable taxon, incertae sedis in Lasius: Seifert, 1992b: 48, Seifert, 2020: 81..