Hemiosus
Sharp, 1882
Species Guides
1Hemiosus is a of water scavenger beetles in the Hydrophilidae, tribe Berosini. The genus was established by Sharp in 1882. within this genus are found in the Neotropical region, particularly in the Andes of Colombia. Recent taxonomic work has described new species based on detailed examination of male genitalia and other morphological features.
Pronunciation
How to pronounce Hemiosus: /hɛˈmi.o.sus/
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Identification
of Hemiosus are distinguished from primarily by characteristics of the , including the shape of parameres (subtriangular or gradually tapering), relative length of lobe compared to parameres and appendices, degree of asymmetry of the phallobase, and acuminate or rounded apices of appendices. Additional diagnostic features include coloration pattern, overall shape of the meso- and metaventral process, and abdominal ventrites.
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Habitat
have been collected from river-associated sandy puddles and temporary puddles near agricultural crops. These suggest a preference for shallow, temporary freshwater environments.
Distribution
Documented from the central cordillera of the Colombian Andes, specifically in the Quindío Department and surrounding departments including Boyacá, Caldas, Casanare, Huila, Meta, Tolima, and Valle del Cauca.
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Taxonomic history
The Hemiosus was established by Sharp in 1882. Recent descriptions of new (H. molanoi and H. quindiensis in 2019) have expanded knowledge of the genus, which remains poorly known compared to other Berosini genera.