Anthidium palliventre

Cresson, 1878

Pacific Woolcarder

Anthidium palliventre is a megachilid native to western North America, commonly known as the Pacific Woolcarder. Females collect plant fibers, particularly from hairy leaves such as lamb's ears (Stachys byzantina), to construct nest . Males establish and defend floral territories, exhibiting aggressive toward other insects that approach their claimed flowers. The is closely related to the introduced European wool carder bee (Anthidium manicatum), but is native rather than .

Anthidium palliventre f by Susan E. Nyoka. Used under a Public domain license.

Anthidium palliventre?? by Juan Emilio from Las Palmas de Gran Canaria, España. Used under a CC BY-SA 2.0 license.

Anthidium palliventre?? (2) by Juan Emilio from Las Palmas de Gran Canaria, España. Used under a CC BY-SA 2.0 license.

Pronunciation

How to pronounce Anthidium palliventre: /ænˈθɪdiəm ˌpælɪˈvɛntri/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from the similar European wool carder bee (Anthidium manicatum) by its native western North American distribution. The specific epithet 'palliventre' refers to the pale or pallid . Females possess scopae (pollen-collecting hairs) on the underside of the abdomen rather than on the hind legs, a characteristic feature of Megachilidae. Males have multiple sharp spines on the abdomen, which they use in territorial combat with other males.

Images

Distribution

Western North America, including California and adjacent regions. Distribution records indicate presence in Middle America and North America.

Host Associations

Stachys byzantina - fiber source for nest constructionFemales scrape or 'card' the hairy leaves to collect nesting fibers

Behavior

Females construct nests using plant fibers collected from hairy leaves, a known as 'carding.' Males are highly territorial, establishing and defending specific floral patches against intruders including other . Territorial males patrol flowers from dawn to dusk, allowing access only to females of their own species for mating and resource collection.

Ecological Role

that visits flowers for nectar and pollen. Contributes to native diversity in western North American .

Human Relevance

Native that has been observed in -friendly gardens and conservation areas. Less well-known than its introduced relative Anthidium manicatum, with which it shares similar nesting .

Similar Taxa

Anthidium manicatumEuropean wool carder bee; introduced to North America with similar male territorial and female fiber-collecting habits, but distinguished by its non-native status and eastern/wider distribution
Anthidium pallidiventreSynonym; emended spelling of the same
Anthidium californicumSynonym; originally described as a separate but now synonymized with A. palliventre

More Details

Taxonomic History

Originally described by Cresson in 1878. The has undergone several taxonomic revisions, with Anthidium californicum and Anthidium palliventre vanduzeei subsequently synonymized. The spelling Anthidium pallidiventre was an emendation by Dalla Torre in 1896.