Crossidius hurdi
Chemsak & Linsley, 1959
Crossidius hurdi is a of longhorn beetle (Cerambycidae) described from New Mexico in 1959. It belongs to the Crossidius, a group of flower-visiting cerambycids associated with composite plants in southwestern North America. The species is known from limited material and appears to be closely related to C. suturalis, with which it has been confused in the field. Its type locality is in the Rodeo area of Hidalgo County, New Mexico.
Pronunciation
How to pronounce Crossidius hurdi: //krɔˈsɪdiəs ˈhɜrdi//
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Identification
Crossidius hurdi is distinguished from the similar and widespread C. suturalis by subtle differences in elytral maculation pattern and body proportions. Based on field observations near the type locality, individuals tentatively identified as C. hurdi appeared smaller and more heavily maculated than typical C. suturalis, though subsequent examination suggested these may have represented variable C. suturalis instead. Definitive identification requires careful comparison of type material and may depend on genitalic dissection or molecular analysis.
Habitat
The type locality is in semi-arid grassland or desert scrub in southwestern New Mexico, at approximately 1.1 miles north of Rodeo. Associated vegetation includes Isocoma tenuisecta (burroweed), a yellow-flowered composite that serves as for related Crossidius .
Distribution
Known only from the type locality in Hidalgo County, New Mexico, USA. No confirmed records exist beyond this single location.
Host Associations
- Isocoma tenuisecta - probable plant inferred from sympatric occurrence with related Crossidius at type locality; not confirmed by direct observation
Similar Taxa
- Crossidius suturalisExtremely similar in size, coloration, and preference; field identification unreliable without detailed examination. Both occur on Isocoma tenuisecta in the same geographic region.
More Details
Taxonomic Uncertainty
The validity and distinctness of C. hurdi from C. suturalis has been questioned based on field observations. Collectors at the type locality found individuals so variable in maculation that specific assignment was impossible without specimen examination. This suggests C. hurdi may represent a variant or of C. suturalis rather than a full , though formal taxonomic revision is needed.
Research Context
The has been targeted for collection as part of broader efforts to Crossidius diversity for molecular phylogenetic studies, indicating ongoing interest in clarifying its taxonomic status.