Stenaspis verticalis arizonicus
Casey, 1912
Stenaspis verticalis arizonicus is a of longhorn in the , Cerambycinae, tribe Trachyderini. It was described by Casey in 1912 and is known from the southwestern United States and Mexico. The subspecies is associated with desert scrub and woodland , particularly in Arizona and adjacent regions. have been observed on Baccharis sarothroides (desert broom), where mating pairs have been documented.
Pronunciation
How to pronounce Stenaspis verticalis arizonicus: /ˌstɛn.əˈspɪs ˌvɜr.tɪˈkæl.ɪs ˌær.ɪˈzoʊ.nɪ.kəs/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from the nominate Stenaspis verticalis verticalis by geographic distribution and potentially subtle morphological differences, though specific diagnostic characters are not well documented in available sources. The Stenaspis verticalis can be recognized within the by its relatively large size among Trachyderini and association with desert vegetation. Separation from congeneric species such as Stenaspis solitaria requires examination of antennal structure and body proportions.
Habitat
Desert scrub and semi-arid woodland, particularly areas with Baccharis sarothroides (desert broom) and associated vegetation. Found in rocky canyon environments and grassland-woodland transition zones in the Sky Islands region of southeastern Arizona.
Distribution
Recorded from Arizona, USA, with distribution extending into Mexico (Guatemala and Honduras records in GBIF). The appears restricted to the southwestern United States and adjacent Middle regions.
Seasonality
active during summer monsoon season; specifically observed in late July to early August in Arizona. Activity likely correlated with summer rainfall patterns and condition.
Host Associations
- Baccharis sarothroides - associationMating pairs observed on stems and foliage; use for resting and likely feeding on sap or floral resources
Behavior
have been observed forming mating pairs on stems. Activity appears concentrated during hot summer conditions. The is and has been collected by visual of host plants rather than by blacklighting, suggesting limited activity.
Similar Taxa
- Stenaspis solitaria in Arizona; distinguished by antennal structure and body proportions, though field separation requires close examination
- Stenaspis verticalis verticalisNominate ; geographic separation is primary distinguishing feature, with arizonicus restricted to southwestern US and adjacent Mexico
- Tragidion spp.Co-occurring found on same Baccharis sarothroides; Tragidion generally smaller with different antennal annulation pattern
More Details
Collection history
Considered a desirable target by visiting Arizona. First collected by the author during a 2018 expedition to the Santa Rita Mountains after targeted searching based on BugGuide records. The was secured on the final day of fieldwork after extensive examination of Baccharis sarothroides plants in Lower Madera Canyon.
Taxonomic note
The was described by Casey in 1912, but modern revisionary work on the appears lacking. The distinction between subspecies may warrant reevaluation with expanded material and molecular data.