Osmia rufina

Taxonomy

Family: Megachilidae
Subfamily: Megachilinae
Tribe: Osmiini
Genus: Osmia Panzer, 1806
Subgenus: O. (Osmia) Panzer, 1806
Species: Osmia rufina Cockerell, 1931
Common name: none

Overview

Osmia rufina are black bees with a metallic green luster (Wu 2006). Females have dense yellow to white hair on the gena, thorax, and legs; light orange hair on T1; and T2T5 are covered with primarily dark brown hair (Wu 2006; Fig 3). Males have white to pale yellow hair on the face, thorax, and abdomen (Wu 2006; Fig 4–6). Female body length is 11–13 mm ,and male body length is 8–9 mm (Wu 2006).

Diagnostic characteristics 

(modified from Wu 2006)

May be confused with 

Osmia rufina look similar to O. bicornis and O. pedicornis. Females of these species all have lateral horns and bidentate median apical projection on the clypeus. O. rufina females can be differentiated by the much shorter, rounded median apical projections on the clypeus and the short, triangular-shaped lateral horns on the clypeus. Males are similar in size and hair color and can be difficult to distinguish without dissecting them to see the genitalia and hidden sterna. They can, however, be distinguished by the shape of S8 and the apex of the gonocoxites.

Phenology

unknown

Host associations 

Osmia rufina are associated with Fabaceae and Platycladus orientalis (Wu 2006).

Nesting behavior 

unknown

Distribution

Osmia rufina specimens have been recorded in Beijing, Fujian, and Sichuan in China (Wu 2006).


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

<p><em>Osmia rufina </em>female face, photo: Chelsey Ritner</p>
Osmia rufina female face, photo: Chelsey Ritner
<p><em>Osmia rufina </em>female lateral habitus, photo: Chelsey Ritner</p>
Osmia rufina female lateral habitus, photo: Chelsey Ritner
<p><em>Osmia rufina </em>female abdomen, photo: Chelsey Ritner</p>
Osmia rufina female abdomen, photo: Chelsey Ritner
<p><em>Osmia rufina </em>male face, photo: Chelsey Ritner</p>
Osmia rufina male face, photo: Chelsey Ritner
<p><em>Osmia rufina </em>male lateral habitus, photo: Chelsey Ritner</p>
Osmia rufina male lateral habitus, photo: Chelsey Ritner
<p><em>Osmia rufina </em>male abdomen, photo: Chelsey Ritner</p>
Osmia rufina male abdomen, photo: Chelsey Ritner
<p><em>Osmia rufina </em>male, diagram showing hidden sterna S8, diagram modified from Wu 2006</p>
Osmia rufina male, diagram showing hidden sterna S8, diagram modified from Wu 2006
<p><em>Osmia rufina </em>male, diagram showing dorsal view of genitalia, diagram modified from Wu 2006</p>
Osmia rufina male, diagram showing dorsal view of genitalia, diagram modified from Wu 2006