Author: Spinola 1839

Type species: Eucera antennata Fabricius, 1793 =
Apis malvae Rossi, 1790, by original designation.
Subgenus: Tetralonia s.str.
Synonym: Macrocera Latreille 1810 (not Meigen 1803)

Clade: Anthophila
Family: Apidae
Subfamily: Apinae
Tribe: Eucerini

Distinctive traits

• Males with very long antennae
• Females with basitibial plate
• Long mouthparts
• 3 submarginal cells of different sizes
• Scopal hairs frequently branched to highly plumose
• Malar space usually linear and narrow

Morphologically close genera and how to distinguish them

• Tetralonia - Eucera

Tetralonia species have three submarginal cells, a flat clypeus, a non-linear malar space and normally plumose scopal hairs. 
Eucera species have two or three submarginal cells, a protuberant clypeus, a linear malar space and normally unbranched scopal hairs

• Tetralonia - Anthophora, Amegilla and Habropoda

Tetralonia species have different-size submarginal cells
​Anthophora, Amegilla & Habropoda species have submarginal cells off equivalent sizes

General comments on Tetralonia species identification
There is only one species of Tetralonia recorded in Europe. However, the genus identification has to be performed with care since Tetralonia malvae is morphologically very close to Tetraloniella species.

List of the 21 Tetralonia species found in Europe (Ghisbain et al. 2023):
Tetralonia (Tetralonia) alticincta (Lepeletier, 1841)
Tetralonia (Tetralonia) cinctella Saunders, 1908
Tetralonia (Tetralonia) dentata (Germar, 1839)
Tetralonia (Tetralonia) fulvescens Giraud, 1863
Tetralonia (Tetralonia) gennargentui (Nobile, Catania & Bella, 2021)
Tetralonia (Tetralonia) glauca (Fabricius, 1775)
Tetralonia (Tetralonia) graja (Eversmann, 1852)
Tetralonia (Tetralonia) hohmanni Tkalců, 1993
Tetralonia (Tetralonia) iberica Dusmet y Alonso, 1926
Tetralonia (Tetralonia) inulae Tkalců, 1979
Tetralonia (Tetralonia) julliani (Pérez, 1879)
Tetralonia (Tetralonia) lanzarotensis Tkalců, 1993
Tetralonia (Tetralonia) lyncea Mocsáry, 1879
Tetralonia (Tetralonia) malvae (Rossi, 1790)
Tetralonia (Tetralonia) nana Morawitz, 1874
Tetralonia (Tetralonia) pollinosa (Lepeletier, 1841)
Tetralonia (Tetralonia) ruficornis (Fabricius, 1804)
Tetralonia (Tetralonia) salicariae (Lepeletier, 1841)
Tetralonia (Tetralonia) scabiosae Mocsáry, 1881
Tetralonia (Tetralonia) strigata (Lepeletier, 1841)
Tetralonia (Tetralonia) vicina Morawitz, 1876

Page contributors:

• Adrien Perrard (Dec. 2023)
• Adrien Perrard (Dec. 2019)

References used to write this page:

• Ghisbain, G., Rosa, P., Bogusch, P., Flaminio, S., Le Divelec, R., Dorchin, A., Kasparek, M., Kuhlmann, M., Litman, J., Mignot, M., Müller, A., Praz, C., Radchenko, V.G., Rasmont, P., Risch, S., Roberts, S.P.M., Smit, J., Wood, T.J., Michez, D. & Reverte, S. (2023). The new annotated checklist of the wild bees of Europe (Hymenoptera: Anthophila). Zootaxa, 5327(1), 1-147.
  
• 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.