Family: Megachilidae
Subfamily: Fideliinae
Tribe: Neofideliini
Genus: Xenofidelia Packer, 2017
Subgenera: none
Common name: none


Xenofidelia have a primarily black thorax and head, but the legs and abdomen have extensive orange, yellow, and brown markings (Packer et al. 2017). They have sparse pale pubescence throughout their body. This genus is known from a single female specimen which has a body length of 8.2 mm (Packer et al. 2017)


Xenofidelia contains one species, X. colorada (Packer et al. 2017); none are known to occur in the U.S. or Canada.

Diagnostic characteristics

(modified from Packer et al. 2017

May be confused with

Xenofidelia looks most similar to Neofidelia and Fidelia because they are covered in pale hair, have wings with three submarginal cells, and have a broad pygidial plate (Packer et al. 2017). Xenofidelia can most easily be differentiated from these genera by the nearly entirely orange abdomen, the shape of the metabasitarsus (described above), and the elongated propodeal triangle (Packer et al. 2017). Xenofidelia also have a shorter labial palpus and lack a glossal rod (Packer et al. 2017).

Known invasives

There are no known invasives.

Host associations

Floral associations are unknown. However, because Xenofidelia lacks a glossal rod, it is likely to visit flowers that have shallow nectaries (Packer et al. 2017).

Nesting behavior

Nesting behavior for Xenofidelia is unknown. It is likely that it’s nesting habits are similar to bees in the subfamily Fideliinae (Packer et al. 2017). The other tribes in this subfamily are known to build unlined nests in very dry, sandy soils that are generally restricted to arid regions (Packer et al. 2017).


Xenofidelia is only known from northeastern Chile (Packer et al. 2017).

Distribution map generated by Discover Life - click on map for details, credits, and terms of use.

<p><em>Xenofidelia colorada </em>female lateral habitus, photo: L. Graham</p>
Xenofidelia colorada female lateral habitus, photo: L. Graham