Pseudoanthidium

Friese, 1898

Small Carder Bees, African Carder Bee (for P. repetitum)

Pseudoanthidium is a of small in the , first described by Friese in 1898. The genus occurs across Eurasia, Africa, and Australia, with nine recorded in Europe. Some species are cavity-nesters that utilize fibers and foreign materials for nest construction. The African carder bee (P. repetitum) has established in eastern and Western Australia since 2000 and shows potential for continued range expansion.

Pseudoanthidium nanum by (c) moxostoma, some rights reserved (CC BY), uploaded by moxostoma. Used under a CC-BY license.

Pseudoanthidium nanum by (c) bdagley, some rights reserved (CC BY), uploaded by bdagley. Used under a CC-BY license.

Pronunciation

How to pronounce Pseudoanthidium: //ˌsjuːdoʊˈænθɪdiəm//

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Habitat

European occupy diverse : P. nanum occurs in xerothermic open habitats and nests in reed stalks and oak ; P. tenellum inhabits terrestrial reed and wet meadows with reed galls and Asteraceae flowering plants. In Australia, the P. repetitum has been recorded in residential areas, urban gardens, and coastal regions, with predicted suitable habitat including hotspots and world heritage areas.

Distribution

range includes Eurasia and Africa. In Europe, nine occur; P. nanum is widespread while P. tenellum is rare throughout its range. In Australia, P. repetitum was first recorded in Queensland in 2000, spread along the eastern coast to Victoria by 2015, and has since been detected in Western Australia (Mandurah region). Current Australian distribution encompasses approximately 332,000 km² concentrated along the eastern coast.

Diet

P. tenellum collects pollen mainly from wetland plants in the Bidens and Pulicaria. P. repetitum is a forager (polylectic), feeding on a wide range of plants from many .

Host Associations

Xylophrurus augustus - , reported from P. nanum
Stelis punctulatissima - reported from P. tenellum
Gasteruption nigrescens - -reported from P. tenellum
Leucospis biguetina - reported from P. tenellum
Miltogramma punctata - reported from P. tenellum
Lipara - inducer; P. tenellum nests in reed induced by this

Life Cycle

Nests constructed in pre-existing cavities. P. nanum nests in reed stalks and oak . P. tenellum nests inside reed galls induced by Lipara ; nest structure similar to P. nanum. P. repetitum nests in artificial substrates including corrugated cardboard, polystyrene, wood, PVC pipes, and garden hoses, using foreign materials such as synthetic fibers (carpet fluff, clothing lint, curtain fabric) and natural fibers.

Behavior

Some are , utilizing or cavities constructed by other organisms. P. tenellum is a reed gall inquiline. Nest construction involves and carding fibers and other materials to cavities.

Ecological Role

Pollen ; serve as for multiple parasitic including , -, and . P. repetitum may alter - interactions and compete with species for food and nesting resources.

Human Relevance

P. repetitum is an in Australia with potential negative impacts on fauna and flora through competition and alteration. The species has become one of the most common in some Australian regions, prompting efforts.

Similar Taxa

AnthidiumBoth are in tribe Anthidiini; Pseudoanthidium was historically classified within Anthidium and shares the of fibers for nest construction.
IcteranthidiumClosely related anthidiine ; the Icteranthidium floripetum was transferred from Pseudoanthidium based on revised .

More Details

Taxonomic complexity

The P. scapulare exhibits paraphyly and low genetic divergence among morphologically distinct , suggesting recent divergences and genetic exchange at contact zones. Ten species are recognized in this complex, including two newly described species (P. kaspareki and P. rozeni).

Subgeneric classification

Some are placed in subgenus Immanthidium, including P. repetitum (the African ).