Northwestern Lady Beetle

Scymnus caurinus

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Coleoptera
Suborder: Polyphaga
Superfamily: Coccinelloidea
Family: Coccinellidae
Subfamily: Scymninae
Tribe: Scymnini
Genus: Scymnus
Species: caurinus

Pronunciation

How to pronounce Scymnus caurinus: /ˈsɪmnʊs kɔːˈraɪnəs/

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Summary

Scymnus caurinus, the northwestern lady beetle, is a beneficial insect species in the family Coccinellidae, primarily known for its role in controlling aphid populations in North America.

Physical Characteristics

Scymnus caurinus is a species of dusky lady beetle. It typically exhibits a darker coloration compared to more brightly colored lady beetles.

Identification Tips

Look for the characteristic dusky coloration and size typical of Scymnus species. They are usually smaller and have a more elongated shape compared to common lady beetles.

Habitat

This species is commonly found in forested areas and regions with abundant vegetation.

Distribution

Scymnus caurinus is primarily distributed across the western parts of North America, including California, British Columbia, and Idaho.

Diet

The diet of Scymnus caurinus mainly consists of aphids and other small insects, making them beneficial for pest control.

Life Cycle

The life cycle includes the stages of egg, larva, pupa, and adult, typical of many beetles in the Coccinellidae family.

Reproduction

Females lay eggs on or near aphid colonies, providing the emerging larvae with immediate access to food.

Ecosystem Role

Scymnus caurinus plays an important role in controlling aphid populations and maintaining the balance within its ecosystem.

Economic Impact

By controlling pest populations, Scymnus caurinus contributes positively to agricultural systems by limiting the need for chemical pest control.