Rhyssa alaskensis

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Hymenoptera
Superfamily: Ichneumonoidea
Family: Ichneumonidae
Subfamily: Rhyssinae
Genus: Rhyssa
Species: alaskensis

Pronunciation

How to pronounce Rhyssa alaskensis: /ˈrɪsə əˌlæˈsɛnsɪs/

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Summary

Rhyssa alaskensis is a parasitic ichneumon wasp endemic to North America, known for its distinctive morphological traits and ecological role in wood-boring larvae's population management.

Physical Characteristics

Rhyssa alaskensis is the only Rhyssa species with posterior orbits that are entirely black, without any markings.

Identification Tips

Look for the characteristic black posterior orbits and the long, hair-thin ovipositor (terebra) used for drilling into wood.

Habitat

Coniferous forests.

Distribution

Present in most of Europe, the Australian region, the Near East, the Nearctic realm, the Indomalayan realm, and North Africa.

Diet

Parasitic; lays eggs on larvae living in timber, which then serve as a food supply and incubator for the progeny.

Life Cycle

Eggs are laid on larvae within wood; the larvae develop by feeding on the host.

Reproduction

Females drill into wood to lay eggs on living larvae.

Ecosystem Role

Parasitic wasps play a role in controlling the population of wood-boring larvae.

Collecting Methods

Trapping with baited traps in suitable habitats.
Hand collection from infested wood.

Preservation Methods

Pinning specimens for entomological collections.
Alcohol preservation for further study.

Similar Taxa

Misconceptions

Some may confuse Rhyssa alaskensis with other ichneumon wasps due to similar body shapes; however, its unique black orbits help in identification.