Osmia inermis 

Scope: Europe
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Hymenoptera Megachilidae

Scientific Name: Osmia inermis (Zetterstedt, 1838)

Assessment Information [top]

Red List Category & Criteria: Least Concern (Regional assessment) ver 3.1
Year Published: 2014
Date Assessed: 2013-10-13
Assessor(s): Lhomme, P.
Reviewer(s): Kemp, J.R., Michez, D. & Nieto, A.
European regional assessment: Least Concern (LC)

EU 27 regional assessment: Least Concern (LC)

Osmia inermis is listed as Least Concern in view of its wide distribution and presumed large overall population.

Geographic Range [top]

Range Description:Osmia inermis occurs in most of Europe but also in northern Asia and in the Nearctic (Scheuchl 1996, Banaszak and Romasenko 2001, Müller 2002, Amiet et al. 2004, Wu 2006).
Countries occurrence:
Austria; Croatia; Czech Republic; Finland; France (France (mainland)); Germany; Greece (Greece (mainland)); Italy (Italy (mainland)); Latvia; Liechtenstein; Macedonia, the former Yugoslav Republic of; Norway; Poland; Russian Federation (Central European Russia, European Russia); Spain (Spain (mainland)); Sweden; Switzerland; United Kingdom (Great Britain)
Additional data:
Range Map:19199637-1

Population [top]

Population:The population size and trends of this species are not known although due to the species' wide distribution and solitary behaviour, it is presumed to have a large population.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:

Osmia inermis possibly occurs in temperate grasslands, forests (or forest edges) and in Mediterranean-type shrublands. It nests in pre-existing cavities. The brood cells (up to 200) are attached to the underside of stones, to the walls of small cavities in rocks and stones. The cells are entirely built of chewed leaves. The nest stones are sealed by a wall of sand towards the ground. Often, several females communally build their brood cells under the same stone (Grandi 1962, Westrich 1989, Müller et al. 1997). This species is polylectic, in that it prefers to forage upon a wide range of flowering plants species, with a preference for Fabaceae (Westrich 1989, Amiet et al. 2004, unpublished data, A. Müller pers. comm. 2014). 


Use and Trade [top]

Use and Trade: There is no current exploitation that could represent a threat to the species as a whole.

Threats [top]

Major Threat(s): The threats to this species are not known.

Conservation Actions [top]

Conservation Actions:

The species is listed in the National Red Lists or Red Data Books of the Czech Republic (Critically Endangered; Farkac et al. 2005), Germany (Endangered; Westrich et al. 2011) and Great Britain (Endangered; Shirt 1987). It is unknown whether it occurs within any protected areas. Further research should be conducted to determine the population size, trends, and threats to the species.

Citation: Lhomme, P. 2014. Osmia inermis. The IUCN Red List of Threatened Species 2014: e.T19199637A21155396. . Downloaded on 17 December 2017.
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