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Published: 2022-11-29

The first record of Mexiconnus Jałoszyński in Costa Rica with description of a new species (Coleoptera, Staphylinidae, Scydmaeninae)

Museum of Natural History, University of Wrocław, Sienkiewicza 21, 50-335 Wrocław, Poland.
Coleoptera Stenichnini Neotropical taxonomy new species


To date, Mexiconnus Jałoszyński was a monotypic genus known to occur in Chiapas, Mexico. The sole species, M. mexicanus (Franz), was unique among Stenichnini in having strongly broadened protarsi with a conspicuous setal cushion on the ventral side of the protarsomere 1. A new species, M. triops sp. n., is described, based on a male collected in central Costa Rica. In contrast to the type species of the genus, the male of M. triops is wingless, microphthalmous and depigmented, a set of features that suggest a possible endogean life habit.



  1. Franz, H. (1980) Monographie der südamerikanischen Scydmaenidae mit Einschluss einiger mittelamerikanischer Arten (Coleoptera). Folia Entomologica Hungarica, 41, 39–264.
    Franz, H. (1994) Monographie der mexikanischen Vertreter der Familie Scydmaenidae (Coleoptera). Beiträge zur Entomologie, 44, 329–398.
    Jałoszyński, P. (2012) Taxonomy of 'Euconnus complex'. Part I. Morphology of Euconnus s. str. and revision of Euconnomorphus Franz and Venezolanoconnus Franz (Coleoptera: Staphylinidae: Scydmaeninae). Zootaxa, 3555, 55–82.
    Jałoszyński, P. (2013) Taxonomy of 'Euconnus complex'. Part II. Revision of Archiconnus Franz, Parapseudoconnus Franz and Mexiconnus gen. nov. (Coleoptera, Staphylinidae, Scydmaeninae). Zootaxa, 3666 (4), 523–543.