Tetropium cinnamopterum

Kirby, 1837

Eastern Larch Borer

Tetropium cinnamopterum is a native North American cerambycid beetle in the tribe Tetropiini. are distinguished from the closely related T. parvulum by shape, scutellar structure, external genitalia, and pronotal puncture number; larvae are distinguished by urogomphi . The has been recorded from various conifer , with larvae developing in conifer wood. It is transcontinental in Canada and occurs sympatrically with T. fuscum in Atlantic Canada, where cross-attraction to the fuscumol may occur. Both sexes respond to (S)-fuscumol synergized by host monoterpenes and ethanol.

Tetropium cinnamopterum by no rights reserved, uploaded by Nick Bédard. Used under a CC0 license.

Insect enemies of the spruce in the Northeast - a popular account of results of special investigations, with recommendations for preventing losses (1901) (14748638976) by Hopkins, Andrew Delmar, 1857-. Used under a No restrictions license.

Pronunciation

How to pronounce Tetropium cinnamopterum: /tɛˈtrəʊpiəm sɪnəˈmɒptərəm/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

distinguished from T. parvulum by: shape; scutellar structure; external genitalia ; and number of pronotal punctures. Larvae distinguished by urogomphi structure. Distinguished from T. parallelum and T. schwarzianum by close morphological affinity requiring detailed examination. Distinguished from T. fuscum by geographic origin and close-range reproductive cues, though cross-attraction to fuscumol occurs.

Images

Habitat

Forests; associated with coniferous trees. Found in pinyon/juniper woodland, ponderosa pine forest, and mixed conifer forests. In Atlantic Canada, occurs in red spruce forests where sympatric with T. fuscum.

Distribution

Transcontinental in Canada: recorded from Alberta, British Columbia, Labrador, and Manitoba. Present throughout North America. Field-trapping studies conducted in Nova Scotia and Poland.

Host Associations

Coniferae (Conifers) - larval Larvae recorded from a number of conifer ; specific not explicitly detailed in source material
Picea (Spruce) - larval Implicated as based on comparison with T. parvulum, which is restricted to spruce
Pinus edulis (Colorado pinyon pine) - association observed on recently dead and dying pinyon pine in pinyon/juniper woodland; beating of branches produced specimens
Pinus ponderosa (Ponderosa pine) - association observed on recently fallen and standing dead ponderosa pine; associated with woodboring guilds

Life Cycle

Larval development occurs in conifer wood. Larvae characterized by diagnostic urogomphi structure. occurs in pupal within wood; emerge from holes in sapwood.

Behavior

Responds to male-produced (S)-fuscumol; attraction strongly synergized by monoterpenes and ethanol blend. Without host volatiles, fuscumol is unattractive or only slightly attractive. Both sexes attracted to pheromone, with sex ratio in traps often female-biased. Cross-attraction to same pheromone blend as congeneric T. fuscum and T. castaneum occurs where are sympatric; reproductive isolation likely maintained via close-range cues rather than pheromone specificity. active on trunks and branches of recently dead or dying conifers. attraction to ultraviolet and mercury-vapor lights observed.

Ecological Role

for ophiostomatoid fungi in forest . Associated with Ophiostoma tetropii and other ophiostomatoid fungi in Atlantic Canada, contributing to -fungus in conifer forests. Member of woodboring beetle guilds colonizing recently dead conifer wood.

Similar Taxa

Tetropium parvulumHistorically confused with T. cinnamopterum; distinguished by larval urogomphi, shape, scutellar structure, genitalia, and pronotal puncture number; restricted to spruce
Tetropium fuscum Eurasian sympatric in Atlantic Canada; cross-attracted to same fuscumol blend; distinguished by geographic origin and close-range reproductive cues
Tetropium castaneumSympatric congeneric responding to same fuscumol ; cross-attraction documented
Tetropium parallelumClose morphological affinity to T. cinnamopterum requiring detailed examination for separation
Tetropium schwarzianumClose morphological affinity to T. cinnamopterum requiring detailed examination for separation