The genus ''Axarus'' is widely distributed with records from the

Holarctic The Holarctic realm is a biogeographic realm that comprises the majority of habitats found throughout the continents in the Northern Hemisphere. It corresponds to the floristic Boreal Kingdom. It includes both the Nearctic zoogeographical reg ...

, the

Neotropics The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone. Definition In bioge ...

and

Australasia Australasia is a region that comprises Australia, New Zealand and some neighbouring islands in the Pacific Ocean. The term is used in a number of different contexts, including geopolitically, physiogeographically, philologically, and ecologic ...

. There are currently 5 described nearctic species . Erected as a subgenus (''Anceus'') of ''Xenochironomus'' , ''Axarus'' was subsequently renamed and elevated to generic status . The

Connecticut River The Connecticut River is the longest river in the New England region of the United States, flowing roughly southward for through four states. It rises 300 yards (270 m) south of the U.S. border with Quebec, Canada, and discharges at Long Islan ...

in the eastern United States harbors locally dense populations of two ''Axarus'' species, both currently undescribed. These populations are interesting in that they are restricted to specific larval habitat (

varve A varve is an annual layer of sediment or sedimentary rock. The word 'varve' derives from the Swedish word ''varv'' whose meanings and connotations include 'revolution', 'in layers', and 'circle'. The term first appeared as ''Hvarfig lera'' (va ...

clay and sometimes rotting wood) and thus there is genetic structure between populations in the river . The Connecticut River species are also notable in that they have extremely well developed

polytene chromosome Polytene chromosomes are large chromosomes which have thousands of DNA strands. They provide a high level of function in certain tissues such as salivary glands of insects. Polytene chromosomes were first reported by E.G.Balbiani in 1881. P ...

s and also maintain a high degree of

inversion Inversion or inversions may refer to: Arts * , a French gay magazine (1924/1925) * ''Inversion'' (artwork), a 2005 temporary sculpture in Houston, Texas * Inversion (music), a term with various meanings in music theory and musical set theory * ...

polymorphism .

Species

*'' A. dorneri'' ( Malloch, 1915) *'' A. festivus''

Say Say may refer to: Music *''Say'' (album), 2008 album by J-pop singer Misono * "Say" (John Mayer song), 2007 *"Say (All I Need)", 2007 song by American pop rock band OneRepublic * "Say" (Method Man song), 2006 single by rapper Method Man * "Say" ( ...

, 1823 *'' A. rogersi'' (Beck and Beck, 1958) *'' A. scopula'' (Townes, 1945) *'' A. taenionotus'' (

, 1829)

References

Chironomidae {{Chironomidae-stub