AntWiki: The Ants --- Online
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Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Lasiini
Genus: Lasius
Subgenus: Chthonolasius
Ruzsky, 1912
Type species
Formica umbrata, now Lasius umbratus

Lasius umbratus casent0005409 profile 1.jpg

Lasius umbratus casent0005409 dorsal 1.jpg

Specimen labels

This is currently a subgenus of Lasius. Please see Lasius for further information.


The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • CHTHONOLASIUS [subgenus of Lasius]
    • Chtonolasius Ruzsky, 1912: 630 [as subgenus of Lasius]. Type-species: Formica umbrata, by subsequent designation of Emery, 1925b: 232.
    • [Chtonolasius also described as new by Ruzsky, 1914a: 59. The claim by some authors (e.g. Emery, 1916a: 11; Donisthorpe, 1941f: 37; Donisthorpe, 1943f: 633) that Ruzsky nominated Lasius flavus as type-species is incorrect. Ruzsky (1912: 630) included those species "with the appearance of the yellow Lasius (Las. flavus D.G.) and its closely related species, and races (Las. carniolicus, Las. umbratus, Las. myops, Las. mixtus)". This is not a direct nomination of a type-species, nor is De Geer (D.G.) the author of flavus: Bolton, 1995b: 24.]
    • Chthonolasius justified emendation of spelling: Wheeler, W.M. 1916k: 170.
    • Chthonolasius junior synonym of Formicina: Wheeler, W.M. 1916k: 172; Emery, 1916a: 11.
    • Chthonolasius subgenus of Acanthomyops: Donisthorpe, 1927b: 254.
    • Chthonolasius subgenus of Lasius: Wheeler, W.M. 1922a: 698; Emery, 1925b: 231; Wilson, 1955a: 13.