Asemini
Guides
Arhopalus
burnt pine longhorn beetle (A. ferus), black pine sawyer (A. rusticus)
Arhopalus is a genus of longhorn beetles (Cerambycidae: Spondylidinae: Asemini) distributed across the Northern Hemisphere, with several species introduced to the Southern Hemisphere as invasive pests of conifers. The genus comprises approximately 20 described species, with A. rusticus and A. ferus being the most extensively studied due to their economic importance. Species develop in dead or fire-damaged conifer wood, with some exhibiting strong attraction to burnt pine volatiles. Several species produce male-emitted aggregation-sex pheromones containing fuscumol and geranylacetone. Invasive populations in New Zealand, Australia, South America, and South Africa require monitoring at ports and sawmills for timber export compliance.
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te-statemethodological-state-stateepistemological-state-stateontological-state-stateaxiological-state-statepraxeological-state-statelogical-state-staterational-state-statereasonable-state-statesensible-state-statepragmatic-state-statepractical-state-statetheoretical-state-stateconceptual-state-stateempirical-state-stateexperimental-state-stateobservational-state-stateexperiential-state-statephenomenological-state-statehermeneutical-state-statecritical-state-statereflexive-state-statereflective-state-staterepresentative-state-stateMegasemum
Megasemum is a genus of longhorn beetles (family Cerambycidae) in the tribe Asemini, established by Kraatz in 1879. The genus includes species such as Megasemum asperum, described by LeConte in 1854. Members of this genus are classified within the subfamily Spondylidinae and are part of the diverse beetle fauna of the Chrysomeloidea superfamily. The genus has been documented in citizen science observations, with over 200 records on iNaturalist.
Megasemum asperum
Megasemum asperum is a longhorn beetle (Cerambycidae) species described by John Lawrence LeConte in 1854. It belongs to the tribe Asemini within the subfamily Spondylidinae. The species is native to western North America, with records from Canada (Alberta, British Columbia) and the United States. Like other members of its tribe, it likely develops in coniferous wood, though specific biological details remain poorly documented.