Miomyrmex

There are two fossil species in the genus Miomyrmex, both known from Florissant shale (Oligocene) in the United Sates. At this time Miomyrmex is incertae sedis within the Dolichoderinae.

Identification
Female.- Head of moderate size, longer than broad; posterior and lateral margins quite straight, sides nearly paralledl; mandibles prominent, deeply corrugated, with four or five blunt teeth on the inner margin; anterior margin of clypeus prolonged, but abruptly truncate; posterior margin slightly prolonged backward; eyes large, situated rather high up on the sides, at about the middle line of the head; ocelli small, close together; antennae inserted close to the clypeus, exceedingly short, 12-segmented, the scapes not over one-half the length of the head, the funiculus only a little longer than the scape; propodeum prolonged backward slightly over the petiole; scale of petiole large, more or less erect, nearly cuneiform; forweing with a closed cubital cell and a discoidal cell.

Distribution
Found in Florissant shale, Colorado, USA.

Castes
Queen, male, worker