Cyrtolobus acutus
Van Duzee, 1908
Cyrtolobus acutus is a Nearctic in the tribe Smiliini, first described from the southwestern United States in 1908. The Cyrtolobus comprises approximately 15 species distributed primarily in eastern and southwestern North America, characterized by their distinctive pronotal . This species represents one of the less commonly encountered members of the genus, with specimen records indicating sporadic occurrence across arid and semi-arid regions.
Pronunciation
How to pronounce Cyrtolobus acutus: //sɪrˈtoʊloʊbəs əˈkjuːtəs//
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Identification
Members of Cyrtolobus are distinguished from related smiliine by the combination of a strongly elevated, often angular pronotum with projections, and forewings with reduced venation. C. acutus specifically may be recognized by the acutely pointed apex of the pronotal projection, consistent with its specific epithet. Separation from congeneric requires examination of pronotal contour, the degree of lateral carination, and male genitalic structures. The species is smaller than the western C. vanduzeei and differs from eastern such as C. fuscipennis in pronotal shape.
Habitat
Arid and semi-arid regions of the southwestern United States, with collections reported from desert scrub and grassland transition zones. plant associations have not been documented for this specifically.
Distribution
Southwestern United States, with confirmed records from New Mexico, Arizona, Colorado, and Texas. GBIF distribution records also indicate isolated occurrences in Indiana and New Jersey, though these may represent misidentifications or vagrant specimens. The appears restricted to the Nearctic region.
Human Relevance
No economic importance has been documented. The is of interest primarily to in Membracidae and as a component of southwestern Nearctic biodiversity surveys.
Similar Taxa
- Cyrtolobus vanduzeeiOverlaps in distribution (Arizona, California); distinguished by larger size and different pronotal apex configuration
- Cyrtolobus fuscipennisEastern North American with similar pronotal structure; separated by geographic range and subtle differences in pronotal angulation
- TelamonaSympatric smiliine with convergent pronotal modifications; distinguished by different wing venation and pronotal carination patterns
More Details
Nomenclatural history
Authorship and date are consistently cited as Van Duzee, 1908. The specific epithet 'acutus' refers to the sharply pointed pronotal apex characteristic of this .
Collection history
The is rarely encountered in collections. The 'Beetles In The Bush' blog (2009) documented a single specimen from New Mexico among material identified by Chris Dietrich, indicating continued rarity in recent decades.