Calosoma protractum
This record describes Calosoma protractum (species). Recorded family: Carabidae. Recorded order: Coleoptera.
Identification and Appearance

Calosoma macrum is a species of ground beetle in the subfamily Carabinae. It was described by John Lawrence LeConte in 1852. The species is 22–29 millimetres (0.87–1.14 in) long, black, and lives at an elevation of 1,100 to 1,700 metres (3,600 to 5,600 ft) in Guerrero, Mexico. It flies in June and October.
Identification notes
fine uniform punctures along barely visible elytral striae; evenly rounded pronotum; size (24-25 mm) important to differentiate from the larger C. macrum
Wikipedia reference for Calosoma protractum: https://en.wikipedia.org/wiki/Calosoma protractum.
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Coleoptera (Beetles)
- Suborder
- Adephaga
- Family
- Carabidae (Ground Beetles)
- Subfamily
- Carabinae
- Tribe
- Carabini
- Genus
- Calosoma (Caterpillar Hunter Beetles)
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
CO and se.AZ south at least to Guerrero, Mexico
Additional species information
Species notes from the sources
Etymology: Calosoma protractum LeConte 1862
About Primitive Winged Insects: the wider group
Order-level background for Coleoptera, the group containing Calosoma protractum. Species-specific details appear above.
Group overview
Coleoptera is the largest order of insects with over 400,000 described species, representing ~25% of all known animal species and ~40% of all insects. In the U.S. alone, nearly 30,000 beetle species have been identified.
Ecological role of the group
Beetles are prominent decomposers, especially in forests, breaking down dead wood and recycling nutrients. As predators, they reduce populations of pest insects. Many species are also important pollinators of flowering plants.
Economic and practical significance of the group
Beetles have major economic significance: leaf beetles (Chrysomelidae) and weevils (Curculionoidea) are among the most destructive agricultural pests globally, costing billions annually, while predatory species like ladybugs provide natural pest control.
Recorded sources for this group: Britannica, Smithsonian, NCSU Entomology. Imported estimates may describe particular regions or reporting periods.
Photos of Calosoma protractum (3)
Photo credits: (c) Tom Murray, some rights reserved (CC BY-NC), uploaded by Tom Murray | (c) Tony Palmer, some rights reserved (CC BY-NC), uploaded by Tony Palmer | Contributed by v belov; Additional contributions by tom murray
Frequently Asked Questions About Calosoma protractum
What is Calosoma protractum?
Calosoma protractum is a species in the family Carabidae, within the order Coleoptera.
How big is Calosoma protractum?
24-25 mm
How do you identify Calosoma protractum?
fine uniform punctures along barely visible elytral striae; evenly rounded pronotum; size (24-25 mm) important to differentiate from the larger C. macrum
Where is Calosoma protractum found?
Range: CO and se.AZ south at least to Guerrero, Mexico
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