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GENUS   Protosmia

Author: Ducke, 1900

Type species: Heriades glutinosus Giraud, 1871, by designation of Michener, 1943: 86 and Sandhouse, 1943: 592.
Subgenera: Chelostomopsis Cockerell, 1925, Nanosmia Griswold, 1998, Protosmia s.str. Ducke, 1900.
Synonyms: Raphidostoma Cockerell, 1936; Anthocopa (Rhodosmia) Michener, 1943
Clade: Anthophila
Family: Megachilidae
SubF: Megachilinae
Tribe: Osmiini
Estimated min and max body length from the genus.
Countries with known records of the genus (based on Nieto et al. 2014).
Estimated difficulty to accurately identify a specimen as belonging to this genus.
Distinctive traits
  • 2 submarginal cells
  • ventral scopa in females
  • arolium present
  • propodeal triangle delimited by a carina
Pictures of distinctive traits.
Morphologically close genera and how to distinguish them
  • Protosmia - Chelostoma
Protosmia species have a propodeal triangle shorter than the metanotum. Females have a labrum with an apical tuft of hairs. In males, T7 is entirely hidden by T6.
Chelostoma species have a propodeal triangle equal or longer than the metanotum. Females have a no apical brush on the labrum. Males have visible T7 under T6.
  • Protosmia - Hofferia
Protosmia species have long hairs at the apex of the labrum.
Hofferia species have no long hairs at the apex of the labrum.
  • Protosmia - Heriades & Stenoheriades
Protosmia species have a carinated propodeal triangle. Some don't have a transverse carina on the T1.
Heriades & Stenoheriades species have only a vestigial propodeal triangle, but do have a transverse carina on the T1.
  • Protosmia - Haetosmia
Protosmia species have no enlargement of the basitarsus of the anterior legs.
Haetosmia species have a strongly carinate pronotal lobe and a wide basitarsus on anterior legs.
  • Protosmia - Osmia & Hoplitis
Protosmia species have a marked propodeal triangle, a slender body-shape and sparse hairs on the mesothorax.
Osmia & Hoplitis species have a vestigial propodeal triangle, a stout body-shape and dense hairs on the mesothorax.
General comments on Protosmia species identification
Species can be distinguished based on lateral ornaments on metasomal tergites and mandible characters, easier to see when mandibles are open.
SPECIES IDENTIFICATION TOOL
Sorry, but the species identification tool is not yet available for Protosmia. 
Please check the reference(s) below for traditional keys.

List of the 14 Protosmia species found in Europe (IUCN 2014 + Rasmont et al 2017):
Protosmia (Chelostomopsis) capitata (Schletterer, 1889)
Protosmia (Chelostomopsis) longiceps (Friese, 1899)
Protosmia (Nanosmia) asensioi Griswold & Parker, 1988
Protosmia (Nanosmia) minutula (Pérez, 1896)
Protosmia (Nanosmia) montana Müller, 2012
Protosmia (Protosmia) exenterata (Pérez, 1895)
Protosmia (Protosmia) glutinosa (Giraud, 1871)
Protosmia (Protosmia) lusitanica Le Goff & Gonçalves, 2018
Protosmia (Protosmia) monstrosa (Pérez, 1895)
Protosmia (Protosmia) paradoxa (Friese, 1899)
Protosmia (Protosmia) sideritis Tkalců, 1978
Protosmia (Protosmia) stigmatica (Pérez, 1896)
Protosmia (Protosmia) tauricola Popov, 1961
Protosmia (Protosmia) tiflensis (Morawitz, 1876)
References with identification keys for some of the species:
  • Müller A. 2017. Palaearctic Protosmia bees of the subgenus Chelostomopsis (Megachilidae, Osmiini): biology, taxonomy and key to species. Zootaxa, 4227(2): 287-294.
Online resources:
Palearctic Osmiine Bees (Palearctic) 
Exotic Bee ID (World)
Discover Life (World)
WestPalBees (West Palearctic)

Page contributors:
  • Adrien Perrard (Dec. 2019)

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References used to write this page:
  • Michener, C.D. 2007. The Bees of the World, 2nd Edition. The John Hopkins University Press, Baltimore.
  • Michez D., Rasmont P., Terzo, M., Vereecken, N. 2019. Abeilles d'Europes. Hymenoptères d'Europes, Volume 1. N.A.P. Editions.
  • Nieto, A., Roberts, S. P., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., ... & Michez, D. 2014. European red list of bees. Luxembourg: Publication Office of the European Union, 98.
  •  Rasmont, P., Devalez, Jelle, Pauly, A., Michez, D. & Radchenko, V.G. 2017. Addition to the checklist of IUCN European wild bees (Hymenoptera: Apoidea). Annales de la Société entomologique de France 53: 17-32.

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