Crossidius suturalis melanipennis
Penrose, 1984
Crossidius suturalis melanipennis is a of longhorn beetle in the Cerambycidae. It belongs to the Crossidius, a group of flower-visiting beetles associated with composite plants in arid and semi-arid regions of western North America. This subspecies was described by Penrose in 1984 and is part of a complex of subspecies within C. suturalis that show geographic variation in coloration and elytral markings.
Pronunciation
How to pronounce Crossidius suturalis melanipennis: //krɔˈsɪdi.əs sjuːˈtʊrəlɪs mɛləˈnɪpɛnɪs//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Distinguished from other Crossidius suturalis by differences in elytral coloration and maculation pattern. Males typically have longer than females. The specific epithet 'melanipennis' suggests darkened or blackened wing covers compared to other . Accurate identification to subspecies level requires examination of and comparison with original description.
Habitat
Associated with Isocoma tenuisecta (burroweed) and other composite plants in desert and semi-desert environments. Occurs in areas with sandy or rocky soils where plants grow.
Distribution
Recorded from southern Arizona and adjacent regions. The broader C. suturalis ranges across the southwestern United States and northern Mexico.
Seasonality
active in late summer and early autumn, coinciding with bloom period of plants. Field observations indicate peak activity in September when Isocoma tenuisecta is in flower.
Host Associations
- Isocoma tenuisecta - plant feed on flowers; larvae presumably develop in roots or stems of plants
Behavior
are and actively visit flowers of plants. Males and females mate on host plant inflorescences. When disturbed, individuals may take and spiral upward before landing on nearby vegetation.
Ecological Role
serve as of composite flowers while feeding on pollen and nectar. Larval stage likely contributes to nutrient cycling through herbivory on plant roots or stems.
Human Relevance
Of interest to coleopterists studying geographic variation and speciation in flower-associated cerambycids. Collected for scientific research on molecular of the Crossidius suturalis .
Similar Taxa
- Crossidius suturalis suturalisNominate with different elytral coloration and geographic distribution
- Crossidius pulchellusSympatric found on Gutierrezia microcephala; distinguished by smaller size and different elytral pattern
- Crossidius hurdiSimilar size and plant use; distinguished by specific differences in pronotal and elytral markings, though field identification can be challenging
- Crossidius coralinusLarger with more expanded elytral markings; occurs on Ericameria nauseosa in California and adjacent areas