Subgenus Orientosmia
The subgenus Orientosmia Peters is confined to the Palaearctic region. It contains a single species.
Species accounts
Osmia (Orientosmia) maxillaris Morawitz, 1875
1875 Osmia maxillaris Morawitz, Travel to Turkestan by A. P. Fedtschenko, p. 82. Type material: Lectotype m, by designation of Peters (1978a: 317) “in valle Sarafschan, Warsaminor, Obburden, Iskander” [Tajikistan], ZIN (St. Petersburg); paralectotypes m, ff. Type species of Orientosmia Peters.-Combination Osmia (Pachyosmia) maxillaris Morawitz in Friese (1911b: 125).
Distribution-Northern Asia: KS, TJ, TM, UZ. Southwestern Asia: IR, TR.
Identification-Keys, Descriptions: Ducke (1900); Peters (1978a).
Nesting biology: Unknown.
Flower preferences: Possibly mesolectic on Fabaceae and a still unknown taxon (Antirrhineae?); an important pollen source is Astragalus (A. Müller, unpublished, based on 16 pollen samples from 8 different localities).
- subspecies dinazade Peters, 1978
1978 Osmia (Orientosmia) maxillaris dinazade Peters, Senckenbergiana Biologica (Frankfurt), 58: 319. Type material: Holotype m, “Pul-i-chatum (an der Grenze von Turkmenien)” [Iran], ZIN (St. Petersburg); paratype m.
Distribution-Northern Asia: TM. Southwestern Asia: IR.
Identification-Keys, Descriptions: No supplementary or more detailed morphological description known. Note: Female unknown.
- subspecies maxillaris Morawitz, 1875
1875 Automatically established nominotypical subspecific taxon (original description and type specimen are identical with those of the species rank taxon of the same name above).
Distribution-Northern Asia: KS, TJ, UZ.
Identification-Keys, Descriptions: Peters (1978a).
- subspecies scheherazade Peters, 1978
1978 Osmia (Orientosmia) maxillaris scheherazade Peters, Senckenbergiana Biologica (Frankfurt), 58: 319. Type material: Holotype m, “Gürün” [Turkey], SMFD (Frankfurt); paratypes mm, ff.
Distribution-Southwestern Asia: IR, TR.
Identification-Keys, Descriptions: No supplementary or more detailed morphological description known.