Eremosaprinus

Ross, 1939

clown beetles

Species Guides

4

Eremosaprinus is a of clown beetles ( Histeridae, Saprininae) containing approximately 10 described . These beetles are obligate , dwelling exclusively in mammal burrows. The genus is characterized by specialized morphological features including modified male abdominal structures with setose patches and , and antennal clubs with distinct sensory areas. Species-level identification relies heavily on male genitalia and secondary sexual characteristics. Most species are distributed in arid regions of southwestern North America, particularly Arizona and California.

Pronunciation

How to pronounce Eremosaprinus: /ɛrɛˌmoʊsəˈpraɪnəs/

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Identification

Members of Eremosaprinus can be distinguished from other Saprininae by the structure of the male metaventrite and abdominal ventrites, which bear setose patches and . The antennal club possesses characteristic sensory areas with vesicles visible under SEM. Prosternal carinal patterns provide additional diagnostic features. -level identification requires examination of male genitalia and secondary sexual characteristics; females are often difficult to identify to species.

Habitat

Obligate mammal burrow-dwelling (). Found in burrows of mammals in arid and semi-arid regions. Collected using barrier pitfall traps and black cup pitfall traps placed at burrow entrances.

Distribution

Southwestern North America, primarily Arizona (Cochise, Mohave, La Paz, Pima, Yuma Counties) and California (Inyo and San Bernardino Counties). The occurs in arid and semi-arid of the southwestern United States and adjacent Mexico.

Host Associations

  • mammals - obligate dwellers in mammal burrows; specific mammal not identified in available sources

Behavior

Obligate inquiliny: these beetles live within mammal burrows and do not construct their own burrows. They are not known to venture far from burrow environments.

Similar Taxa

  • other Saprininae generaEremosaprinus differs from related in the Saprininae by the combination of modified male metaventrite and abdominal ventrite structures with setose patches and , and the specific configuration of antennal sensory areas

More Details

Taxonomic history

The was established by Ross in 1939. A major revision was published by Lackner and Tishechkin, with a supplement in 2014 describing E. warneri from southeastern Arizona and providing new distributional data for four other .

Collection methods

Effective collection requires specialized techniques including barrier pitfall trapping and black cup pitfall trapping at mammal burrow entrances, rather than standard surface collecting methods.

Sources and further reading