Scaphinotus cristatus

(T.W.Harris, 1839)

ridged thorax snail-eating beetle, ridged snail-eating beetle

Scaphinotus cristatus is a flightless ground beetle in the Carabidae, commonly known as the ridged snail-eating . It is restricted to western North America, occurring in California and Oregon. The inhabits mixed and coniferous forests and is specialized for feeding on snails. possess brachypterous (shortened) wings that render them incapable of .

Pronunciation

How to pronounce Scaphinotus cristatus: /ˌskæfɪˈnoʊtəs krɪˈsteɪtəs/

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Identification

Distinguished from other Scaphinotus by the ridged or crested referenced in its specific epithet "cristatus." The brachypterous condition (shortened, non-functional wings) separates it from fully winged ground beetles in the same . As a member of the Scaphinotus, it has elongated mouthparts adapted for extracting snails from their shells.

Habitat

Mixed and coniferous forests in western North America.

Distribution

California and Oregon, USA.

Diet

Snails.

Ecological Role

Specialized snail in forest .

Similar Taxa

  • Other Scaphinotus speciesShare -level traits of elongated mouthparts for snail feeding and flightless condition, but differ in thoracic and geographic distribution.
  • Other Carabidae in western forestsMost lack the brachypterous condition and specialized snail-feeding mouthparts; many are or fully winged.

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Sources and further reading