Subgenus Dendrolasius ants are NOT Lasius ants IMO because "Lasius" means "fuzzy" and none of them are fuzzy at all.

They are the "shiny fuzzy ants"... this includes Lasius fuliginosus and sister species. However a phylogeny that excluded these ants would also exclude Lasius brunneus... which seems intolerable.

Comparison of phylogenetic hypotheses for Lasius; red indicates paraphyly of Lasius sensu stricto, orange of Lasius (Cautolasius) and violet
of Lasius (Chthonolasius). (A) Intuition-based topology from Wilson (1955). (B, C) combined morphological and mitochondrial topologies of Janda
et al. (2004), and Maruyama et al. (2008). (D) Consensus topology from the current study; see Table 4 for Bayes factor tests of our constraint analyses.
ALT