Trichiorhyssemus riparius
(Horn, 1871)
Trichiorhyssemus riparius is a small aphodiine dung beetle in the Scarabaeidae, first described by Horn in 1871. It belongs to the tribe Psammodiini, a group commonly associated with sandy . The is known from the southwestern United States.
Pronunciation
How to pronounce Trichiorhyssemus riparius: //ˌtrɪki.oʊˈɹɪsɪməs rɪˈpɛəriəs//
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Identification
Members of Trichiorhyssemus are small, compact beetles with setose (hairy) , distinguishing them from related in Psammodiini. The specific epithet "riparius" suggests association with riparian zones, though this has not been formally documented for identification purposes. Distinguishing T. riparius from congeneric requires examination of male genitalia and detailed comparison of setal patterns.
Distribution
Southwestern United States: Arizona, California, Colorado, New Mexico, and Utah. Records indicate presence in the Nearctic region.
Similar Taxa
- Other Trichiorhyssemus speciesCongeneric share the characteristic setose and small body size; accurate identification requires detailed morphological examination.
- Psammodius speciesMembers of the same tribe Psammodiini with similar small size and sand-associated habits; differ in elytral setation and pronotal structure.
More Details
Etymology
The specific epithet "riparius" derives from Latin, meaning "of the riverbank" or "riparian," suggesting the original description may have noted association with water margins, though this is not confirmed in modern records.
Taxonomic history
Originally described by George Henry Horn in 1871. The Trichiorhyssemus was established to accommodate with distinctive trichoid (hair-like) setae on the .