Pterostichus pumilus

Casey, 1913

woodland ground beetle

Species Guides

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Pterostichus pumilus is a of ground beetle in the Carabidae, described by Thomas L. Casey in 1913. The species is found in North America, with records from Canada and the United States. Two are recognized: Pterostichus pumilus pumilus and Pterostichus pumilus willamettensis. As a member of the Pterostichus, it belongs to a large group of ground beetles commonly associated with woodland .

Pterostichus pumilus by (c) David Anderson, some rights reserved (CC BY), uploaded by David Anderson. Used under a CC-BY license.Pterostichus pumilus by (c) David Anderson, some rights reserved (CC BY), uploaded by David Anderson. Used under a CC-BY license.Pterostichus pumilus by (c) Koji Shiraiwa, some rights reserved (CC BY), uploaded by Koji Shiraiwa. Used under a CC-BY license.

Pronunciation

How to pronounce Pterostichus pumilus: /tɛroˈstiːkxʊs pjuːˈmaɪləs/

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Identification

Pterostichus pumilus can be distinguished from other Pterostichus by subtle morphological characters typical of the , including the form of the male genitalia and details of elytral striation and punctuation. The two , P. p. pumilus and P. p. willamettensis (described by Hacker, 1968), are differentiated by geographic distribution and minor morphological differences.

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Habitat

Woodland .

Distribution

North America; recorded from Canada and the United States.

More Details

Subspecies

Two are recognized: Pterostichus pumilus pumilus Casey, 1913 (the nominate subspecies) and Pterostichus pumilus willamettensis Hacker, 1968.

Taxonomic authority

The was described by American entomologist Thomas Lincoln Casey in 1913.

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Sources and further reading