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New species of the extinct ant genus Stigmomyrmex Mayr and designation of the neotype of Stiphromyrmex robustus (Mayr) (Hymenoptera: Formicidae: Myrmicinae)

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Radchenko A. , Dlussky G. M.

Annales Zoologici

2017

tom 67

nr 4

The extinct ant genera Stigmomyrmex Mayr and Stiphromyrmex Wheeler (subfamily Myrmicinae) were described from the Baltic amber (Late Eocene, Priabonian, ca. 34-38 Ma). A new species, Stigmomyrmex rugulosus sp. nov., is described from the Baltic and Bitterfeld ambers, and a neotype of Stiphromyrmex robustus (Mayr) is designated. Additionally, we found from the Bitterfeld amber three more specimens of S. venustus Mayr, previously the only known species of the genus. S. rugulosus well differs from S. venustus by the presence of longitudinal rugulosity on the head dorsum, mesosoma and waist, and by the presence of numerous suberect hairs on the legs.

A new ant genus from the late Eocene European amber

100%

Dlussky G. , Radchenko A.

2006

tom 51

nr 3

Eocenomyrma gen. nov. of extinct ants of the family Formicidae, subfamily Myrmicinae, is described from the late Eocene European amber (ca. 40 Ma), based on six specimens from six pieces of amber; three of them contain E. rugosostriata (Baltic and Saxonian ambers); the remainder contain three new species: E. orthospina (Baltic Amber), E. electrina (Scandinavian Amber), and E. elegantula (Baltic Amber). Eocenomyrma resembles two extant genera: Myrmica and Temnothorax (both of which also occur in late Eocene European amber), but differs from them by the following apomorphies: clypeus short and broad, with two lateral longitudinal carinae and distinctly marked anterolateral corners, its median portion faintly concave transversally, anterior margin broad and shallowly concave medially, with pairs of long setae situated on the anterolateral clypeal corners, and central part of the anterior clypeal margin without setae; middle and hind tibiae lacking the spurs. Palp formula in Eocenomyrma is 4, 3 versus 6, 4 in Myrmica. We include Eocenomyrma in the tribe Formicoxenini. Nothomyrmica rugosostriata is transferred to Eocenomyrma, and the neotype of the latter species is designated; Nothomyrmica petiolata is transferred to the genus Temnothorax. A key for the identification of all known Eocenomyrma species is compiled.