A revision of the genus Mecistostethus Marseul (Histeridae, Histerinae, Exosternini)
Caterino, Michael S. | Tishechkin, Alexey K. | Dégallier, Nicolas
We revise the genus Mecistostethus Marseul, sinking the monotypic genus Tarsilister Bruch as a junior synonym. Mecistostethus contains six valid species: Mecistostethus pilifer Marseul, Mecistostethus loretoensis (Bruch), comb. n., Mecistostethus seagorum sp. n., Mecistostethus carltoni sp. n., Mecistostethus marseuli sp. n., and Mecistostethus flechtmanni sp. n. The few existing records show the genus to be widespread in tropical and subtropical South America, from northern Argentina to western Amazonian Ecuador and French Guiana. Only a single host record associates one species with the ant Pachycondyla striata Smith (Formicidae: Ponerinae), but it is possible that related ants host all the species.
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