ColeopteraCarabidae – Ground Beetles

Calosoma protractum

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

Identification and Appearance

Calosoma protractum - Calosoma protractum
(c) Tom Murray, some rights reserved (CC BY-NC), uploaded by Tom Murray

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.

Explore Coleoptera families and species →

Photos of Calosoma protractum (3)

Calosoma protractum - photo 1
(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
Calosoma protractum - photo 2
(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
Calosoma protractum - photo 3
(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

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

How we use and review source data. Source count does not imply independent verification.

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. Contributors retain copyright over their individual contributions.