Calosoma marginale

Casey, 1897

rimmed caterpillar hunter, Wrinkle-winged Calosoma

A large ground beetle in the Calosoma, commonly known as the rimmed caterpillar hunter. are and active that hunt caterpillars and scarabaeid beetles. The occurs across a broad geographic range from Central America through the southern and central United States. Adults overwinter in the ground.

Calosoma marginale by (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist. Used under a CC-BY license.Calosoma marginale by (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist. Used under a CC-BY license.Calosoma marginale by (c) F. LaBry, some rights reserved (CC BY), uploaded by F. LaBry. Used under a CC-BY license.

Pronunciation

How to pronounce Calosoma marginale: /ˌkaləˈsoʊmə mɑrˈdʒɪneɪli/

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Identification

A member of the large-bodied caterpillar hunter Calosoma. Distinguished from by specific morphological features associated with the epithet "marginale" (referring to margined or rimmed characteristics), though precise diagnostic traits require examination. Within the genus, it is smaller than the fiery searcher (Calosoma scrutator) and lacks the intense purple pronotal coloration of that species.

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Habitat

Open including prairies, pastures, cultivated fields, and wastelands.

Distribution

Central America and North America. Specifically recorded from Rica, Mexico (Chihuahua, Michoacán, Nuevo León, Tamaulipas), and the United States (Arizona, California, Colorado, Iowa, Illinois, Kansas, Missouri, Nebraska, New Mexico, Oklahoma, Texas).

Seasonality

are (active at dusk). occurs in the ground.

Diet

Preys on caterpillars and scarabaeid beetles.

Life Cycle

deposited in soil. Larvae are ground-dwelling . overwinter underground.

Behavior

Arboreal foraging capability typical of the — climb trees to hunt caterpillars. Rapid runners that are difficult to approach. When captured, adults release potent chemical defenses including methacrylic acid and salicylaldehyde.

Ecological Role

of caterpillars and other soft-bodied insects; contributes to of caterpillar in forest and agricultural systems.

Human Relevance

Beneficial insect for agriculture due to on caterpillar pests. Chemical defense can cause skin irritation if handled.

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