Linguamyrmex Barden & Grimaldi

Phillip Barden, Hollister W. Herhold & David A. Grimaldi, 2017, A new genus of hell ants from the Cretaceous (Hymenoptera: Formicidae: Haidomyrmecini) with a novel head structure, Systematic Entomology 42, pp. 837-846: 839

publication ID 10.1111/syen.12253

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Linguamyrmex Barden & Grimaldi

new genus

Genus Linguamyrmex Barden & Grimaldi  , new genus 4B3C-AB8B-EE0D234CC118

Figs 1–5View Fig. 1View Fig. 2View Fig. 3View Fig. 4View Fig. 5, 7View Fig. 7, Video S1.

Diagnosis, worker. As in other haidomyrmecines ( Haidomyrmex  , Haidoterminus  , Haidomyrmodes  , Ceratomyrmex  ), head hypognathous-like with mandibles projecting primarily downward; mandible scythe-like, with flattened basal margin leading to a curved apical tooth that is expanded perpendicular to axial plane of head. Cephalic clypeal ‘horn’ present but abbreviated, differs from Ceratomyrmex  by horn stalk of Linguamyrmex being glabrous, that of Ceratomyrmex  with fine, stiff setae of various lengths; clypeal horn much shorter in Linguamyrmex, less than head length/depth, stalk short, with the expanded, flat, paddle-shaped setose pad comprising>50% total horn length; clypeal pad slightly trough-shaped ventrally, covered with very short, dense velcro-like vestiture; trigger hairs originate not at base of stalk as in Ceratomyrmex  but near basal margin of setose pad; ocelli present. In addition, Linguamyrmex with first and second gastral segments with deep constriction between them (a gastral constriction is figured in description of Haidomyrmodes  mammuthus but is less developed).

Type species. L. vladi  sp.n.

Etymology. From Latin ‘lingua’, meaning tongue – in reference to the tongue-like clypeal projection – and the Greek ‘myrmex’, meaning ant.