Limon Knobtail

In adult males, the head has a black labrum, dark brown postclypeus, yellow-green labium, and brown and yellow-green frons. The prothorax is dark brown with green spots on the middle lobe. The pterothorax is black and dark brown with a number of green and yellow stripes and spots. The abdomen is black and has ten segments, with yellow stripes and spots. The wings have red-brown pterostigma and black veins. In the holotype male, the abdominal length is 39.5 mm, the hind-wing length is 34.5 mm and the total length is 53.6 mm.

Endemic to Costa Rica, Epigomphus houghtoni is known from only from the type specimen, which was collected in the Limón Province. It likely has a wider range in lowland Central America, stretching as far as perhaps Panama and Nicaragua, but has not been recorded subsequent to its description. The species is classified as being of endangered by the IUCN as most of its likely range has suffered from extensive deforestation.

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