The Stenotritidae is the smallest of all formally recognised bee families, with only 21 species in two genera, all of them restricted to Australia. Historically, they were generally considered to belong in the family

Colletidae The Colletidae are a family of bees, and are often referred to collectively as plasterer bees or polyester bees, due to the method of smoothing the walls of their nest cells with secretions applied with their mouthparts; these secretions dry into ...

, but the stenotritids are presently considered their

sister taxon In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and ...

, and deserving of family status.ResearchGate Publication 6778915
/ref> Of prime importance is that the stenotritids have unmodified mouthparts, whereas colletids are separated from all other bees by having bilobed glossae. The American entomologist Ronald J. McGinley proposed their position as an independent family based on the morphology of the glossae in 1980. This view quickly became established. They are large, densely hairy, fast-flying bees, which make simple burrows in the ground and firm,

ovoid An oval () is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas (projective geometry, technical drawing, etc.) it is given a more precise definition, which may include either one o ...

provision masses in cells lined with a waterproof secretion. The nests of some species can reach a depth of more than three metres.BioStorBHLResearchGate Publication 267823176
/ref> The larvae do not spin cocoons. Fossil brood cells of a stenotritid bee have been found in the

Pleistocene The Pleistocene ( , often referred to as the '' Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed ...

of the Eyre Peninsula, South Australia.BioStorBHL
/ref>

Species

The family contains two genera: '' Ctenocolletes'' and '' Stenotritus''.

''Ctenocolletes''

* '' Ctenocolletes albomarginatus'' ( Michener, 1965) * '' Ctenocolletes centralis'' (Houston, 1983) * '' Ctenocolletes fulvescens'' (Houston, 1983) * '' Ctenocolletes nicholsoni'' ( Cockerell, 1929) * '' Ctenocolletes nigricans'' (Houston, 1985) * '' Ctenocolletes ordensis'' (Michener, 1965) * '' Ctenocolletes rufescens'' (Houston, 1983) * '' Ctenocolletes smaragdinus'' (

Smith Smith may refer to: People * Metalsmith, or simply smith, a craftsman fashioning tools or works of art out of various metals * Smith (given name) * Smith (surname), a family name originating in England, Scotland and Ireland ** List of people w ...

, 1868) * '' Ctenocolletes tigris'' (Houston, 1983) * '' Ctenocolletes tricolor'' (Houston, 1983)

''Stenotritus''

* '' Stenotritus elegans'' (Smith, 1853) * '' Stenotritus elegantior'' (Cockerell, 1921) * '' Stenotritus ferricornis'' (Cockerell, 1916) * '' Stenotritus greavesi'' ( Rayment, 1930) * '' Stenotritus murrayensis'' (Rayment, 1935) * '' Stenotritus nigrescens'' ( Friese, 1924) * '' Stenotritus nitidus'' (Smith, 1879) * '' Stenotritus pubescens'' (Smith, 1868) * '' Stenotritus rufocollaris'' (Cockerell, 1921) * '' Stenotritus splendidus'' (Rayment, 1930) * '' Stenotritus victoriae'' (Cockerell, 1906)

References

* Bee families Hymenoptera of Australia {{Bee-stub