Osmia cerinthidis

Taxonomy

Family: Megachilidae
Subfamily: Megachilinae
Tribe: Osmiini
Genus: Osmia Panzer, 1806
Subgenus: O. (Osmia) Panzer, 1806
Species: Osmia cerinthidis Morawitz, 1876
Common name: none

Overview

Osmia (Osmia) cerinthidis are dark bees with a metallic blue shimmer on the head and thorax and a metallic bronze or blue hue to the abdomen. Hair coloration of O. cerinthidis can be highly variable, ranging from light grey to intensely reddish-brown (Peters 1978). Female body length is 11 –12 mm. Male body length is 10–11 mm (Amiet et al. 2004).

Diagnostic characteristics 

(modified from Peters 1978 and Amiet 2004)

  • Mouthparts much smaller than the length of the entire body when extended.
  • Female clypeus with two curved lateral horns with blunt tips protruding and a median apical spine.
  • Female scopa red.
  • Female terga without apical hair bands.
  • Male S6 with longitudinal gradulus.
  • Male gonocoxites digitiform after bending apically.

May be confused with 

Osmia cerinthidis may be confused with O. rufa because of sometimes similar hair coloration (Peters 1978; Amiet 2004). Females can be distinguished from O. rufa by the shape of the clypeus, and males can be distinguished by the shape of the gonocoxites which are more digitiform apically in O. cerinthidis.

Phenology

Osmia cerinthidis adults have been recorded in flight from April to July (Banaszak and Romasenko 1998).

Host associations 

Osmia cerinthidis is oligolectic on Boraginaceae with a strong preference for Cerinthe (Boraginaceae) (Amiet et al. 2004; Haider et al. 2013; Banaszak and Romasenko 1998).

Nesting behavior 

Osmia cerinthidis nest in preexisting cavities such as the hollow stems of grasses, for example in Phragmites (Banaszak and Romasenko 1988). Osmia cerinthidis has also been known to nest in man-made cavities like drilled borings in wooden blocks (Banaszak and Romasenko 1998). Cell partitions and nest plugs are made of sand and earth dust glued with saliva (Banaszak and Romasenko 1998).

Distribution

Osmia cerinthidis is native to southern Europe, and specimens have been recorded in central Europe from the eastern Alps to Ukraine (Amiet et al. 2004).


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

<p><em>Osmia cerinthidis</em> female face, photo: Chelsey Ritner</p>
Osmia cerinthidis female face, photo: Chelsey Ritner
<p><em>Osmia cerinthidis</em> female lateral habitus, photo: Chelsey Ritner</p>
Osmia cerinthidis female lateral habitus, photo: Chelsey Ritner
<p><em>Osmia cerinthidis</em> female abdomen, photo: Chelsey Ritner</p>
Osmia cerinthidis female abdomen, photo: Chelsey Ritner
<p><em>Osmia cerinthidis</em> male face, photo: Chelsey Ritner</p>
Osmia cerinthidis male face, photo: Chelsey Ritner
<p><em>Osmia cerinthidis</em> male lateral habitus, photo: Chelsey Ritner</p>
Osmia cerinthidis male lateral habitus, photo: Chelsey Ritner
<p><em>Osmia cerinthidis</em> male abdomen, photo: Chelsey Ritner</p>
Osmia cerinthidis male abdomen, photo: Chelsey Ritner
<p><em>Osmia cerinthidis</em> male, diagram showing dorsal view of genitalia, diagram modified from Amiet 2004</p>
Osmia cerinthidis male, diagram showing dorsal view of genitalia, diagram modified from Amiet 2004