Mud-nesting Spider Wasps

Ageniellini

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Hymenoptera
Superfamily: Pompiloidea
Family: Pompilidae
Subfamily: Pepsinae
Tribe: Ageniellini

Pronunciation

How to pronounce Ageniellini: //ˌædʒɪniˈɛlaɪniː//

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Summary

Ageniellini is a tribe of mud-nesting spider wasps known for their unique nesting behavior and slender bodies. They exhibit kleptoparasitic behaviors and construct communal mud nests for their young, which feed on spiders.

Physical Characteristics

Slender-bodied with a petiolate abdominal structure and typically lacking a transverse carina on the first segment of the gaster.

Identification Tips

Distinguished from most other Pompilidae by specific morphological traits. Similar to Melanagenia but differs by the absence of malar space and deep lateral sulcus of the pronotum.

Habitat

Dry soil environments where they can construct nests.

Distribution

Cosmopolitan.

Diet

Larvae feed on spiders, which are provisioned in the nests.

Life Cycle

Ageniellini spiders wasps typically lay a single egg on a spider that they have captured, which serves as food for the developing larva.

Reproduction

Each nest contains an egg and a spider for the larva to consume.

Predators

Messatoporus discoidalis (Ichneumonidae) parasitizes members of this tribe.

Ecosystem Role

As predators of spiders, they play a role in maintaining spider populations in their habitats.

Similar Taxa

Melanagenia (Pepsini)

Misconceptions

Some may confuse them with other spider wasps due to similar body structures.