Overview

Comprehensive Description

Nesting Biology

Nest in holes in wood blocks or pithy stems. Cell partitions and caps are made of leaf pulp (Cane et al. 2007).

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Source: Anthophila – an online repository of bee diversity

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Distribution

occurs (regularly, as a native taxon) in multiple nations

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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Global Range: (>2,500,000 square km (greater than 1,000,000 square miles)) Older literature: Minnesota to Quebec and the New England states, south to Georgia. Discover Life Map shows this species to be widespread from Minnesota to Nova Scotia south to about Atlanta, Georgia and southern Mississippi, as Nebraska, Kansas, and extending south through Texas into Nuevo Leon, Mexico. It appears widespread in the Midwest and eastward occurs in the coastal plain, piedmont and the mountains.

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Physical Description

Type Information

Holotype for Osmia pumila Cresson, 1864
Catalog Number: USNM
Collection: Smithsonian Institution, National Museum of Natural History, Department of Entomology
Sex/Stage: Female;
Preparation: Pinned
Locality: Penn., Pennsylvania, United States
  • Holotype: 1864. Proceedings of the Entomological Society of America. 2: 35.
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Source: National Museum of Natural History Collections

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Ecology

Associations

Flowering Plants Visited by Osmia pumila in Illinois

Osmia pumila Cresson: Megachilidae (Osmiini), Hymenoptera
(observations are from Robertson, Graenicher, Crosswhite & Crosswhite, Stoutamire, Barrett & Helenurm, Cane et al., Steury et al., Smith et al., and Grundel et al.)

Apiaceae: Chaerophyllum procumbens sn (Rb), Erigenia bulbosa sn (Rb), Zizia aurea sn (Rb); Asteraceae: Antennaria plantaginifolia [stam sn] (Rb), Krigia biflora sn (Rb, Gnd), Taraxacum officinale sn (Rb); Boraginaceae: Mertensia virginica sn cp (Rb); Brassicaceae: Arabis laevigata sn (Rb), Arabis shortii sn (Rb), Cardamine bulbosa sn cp fq (Rb), Dentaria laciniata sn (Rb); Caprifoliaceae: Linnaea borealis (BH), Viburnum dentatum sn (Rb), Viburnum prunifolium sn (Rb); Caryophyllaceae: Cerastium arvense (SDO); Cornaceae: Cornus florida sn cp (Rb); Ebenaceae: Diospyros virginiana [stam sn] [pist sn] (Rb); Ericaceae: Gaylussacia baccata (Gnd), Vaccinium stamineum cp fq (Cn); Fabaceae: Astragalus crassicarpus trichocalyx sn cp fq (Rb), Cercis canadensis sn cp fq (Rb), Lupinus perennis cp (Gnd), Tephrosia virginiana (Gnd), Trifolium repens sn cp fq (Rb); Geraniaceae: Geranium maculatum sn (Rb, SDO); Grossulariaceae: Ribes missouriense sn (Rb); Hydrophyllaceae: Ellisia nyctelea sn (Rb), Hydrophyllum appendiculatum sn cp fq (Rb); Iridaceae: Sisyrinchium angustifolium sn (Rb); Lamiaceae: Glechoma hederacea sn fq (Rb), Salvia lyrata (Smh), Scutellaria parvula sn cp (Rb); Lauraceae: Sassafras albidum sn (Rb); Liliaceae: Allium canadense sn (Gr), Camassia scilloides sn (Rb), Erythronium albidum sn fq (Rb, Gr), Erythronium americanum sn (Gr), Uvularia grandiflora sn (Gr); Malvaceae: Malva neglecta sn (Rb); Onagraceae: Oenothera fruticosa (Gnd); Orchidaceae: Cypripedium pubescens exp (Stm); Oxalidaceae: Oxalis corniculata sn cp (Rb), Oxalis violacea sn fq (Rb); Polemoniaceae: Polemonium reptans sn cp fq (Rb); Portulacaceae: Claytonia virginica sn (Rb); Ranunculaceae: Anemonella thalictroides cp (Rb), Enemion biternatum cp/exp (Rb), Ranunculus fascicularis sn fq (Rb), Ranunculus septentrionalis sn cp fq (Rb); Rosaceae: Fragaria virginiana sn cp (Rb), Rosa sp. cp (Smh), Rosa setigera cp (Rb), Rubus allegheniensis sn cp (Rb, Gnd), Rubus flagellaris sn cp fq (Rb), Rubus hispidus (Gnd), Rubus occidentalis sn (Rb); Rutaceae: Zanthoxylum americanum [stam sn fq] [pist sn fq] (Rb); Salicaceae: Salix amygdaloides [pist sn] (Rb), Salix rigida [stam sn fq] (Rb); Santalaceae: Comandra umbellata sn (Rb); Scrophulariaceae: Collinsia verna sn cp fq (Rb), Penstemon digitalis sn (Rb, CC), Penstemon gracilis gracilis (CC), Penstemon gracilis wisconsinensis (CC), Penstemon hirsutus sn cp fq (Rb), Penstemon laevigatus (SDO), Penstemon pallidus (CC); Smilacaceae: Smilax tamnoides hispida sn cp (Rb); Valerianaceae: Valerianella radiata sn (Rb); Violaceae: Viola cucullata sn cp fq (Rb), Viola pubescens sn cp fq icp (Rb), Viola sagittata sn (Rb), Viola striata sn cp fq (Rb)

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: Unknown

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Osmia pumila

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 12
Species With Barcodes: 1
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Source: Barcode of Life Data Systems (BOLD)

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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

Reasons: This is a very widespread, generalized, species, ranging from southern Canada into northern Mexico. It has no special nesting requirements. It visits a variety of flowers, including at least four crop genera, of which the two blueberries are also very common native species, and Malus and Rubus contain native as well as cultivated species. While this species has not been evaluated in great detail, it is almost certainly secure in much of its range, i.e. in much of the eastern USA.

Intrinsic Vulnerability: Not intrinsically vulnerable

Environmental Specificity: Broad. Generalist or community with all key requirements common.

Other Considerations: Probably fairly common northward and much more widely. This is one of several species of Osmia reported by Tuell et al. (2009) to pollinate both commercial blueberry in Michigan and a different species of blueberry in Maine (Stubbs et al., 1997). However, it is certainly not closely associated with blueberry based on its the range and on Virginia farms it is also reported from apple, Rubus, and once from cucurbits by Adamson (2011), although 15 of her 31 observations were form blueberry. This is one of two out of 13 species of Osmia that she found on all four crops, and the third most numerous species. Mitchell (1962) has reports from an exceptional variety of flowers, even grasses.

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Global Short Term Trend: Relatively stable (=10% change)

Global Long Term Trend: Unknown

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Threats

Comments: No major threats are known.

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Management

Global Protection: Unknown whether any occurrences are appropriately protected and managed

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Names and Taxonomy

Taxonomy

Comments: Placed in subgenus Nothosmia by Krombein et al. (1979). Michener (2000) included Centrosmia, Chenosmia, Monilosmia, and Nothosmia in Melanosmia. Sandhouse (1939) revised the Nearctic species, mostly under the subgeneric name Nothosmia.

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