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Coenosiinae - US/Canada (in development)

Authors: Even Dankowicz

Last updated: 2019

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https://www.inaturalist.org/observations/identify?taxon_id=497206&place_id=1

https://www.inaturalist.org/observations/identify?taxon_id=497206&place_id=6712

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Coenosiinae of the United States, Canada

  • Coenosiini
  • Limnophorini

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Coenosiini

  • Allognota semivitta
  • Bithoracochaeta leucoprocta
  • Caricea
  • Coenosia
  • Limnospila albifrons
  • Macrorchis
  • Neodexiopsis
  • Pentacricea
  • Pseudocoenosia
  • Schoenomyza
  • Pachyceramyia

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Allognota semivitta

  • C ending just beyond R4+5 apex

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Eastern

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Bithoracochaeta leucoprocta

  • C ending at apex of M
  • Two pairs of postsutural dorsocentral thoracic bristles
  • Long posteroventral bristle on medial hind tibia

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Southern

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Caricea

  • C ending at apex of M
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Without posteroventral bristle on medial hind tibia
  • 2 reclinate orbital bristles
  • 2 inclinate frontal bristles

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widespread

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Thorax

Wings

Legs

C. acuticauda

CA

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C. aemulata

ME

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C. alma

Widespread north of TN

Grey with dark dorsocentral stripes

Infuscated crossveins

Femora mostly greyish, tibiae more reddish

C. brevitarsis

Far north, rocky mountains

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C. eludens

YK

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C. erythrocera

Widespread

Evenly light grey

Hyaline

Femora mostly greyish, tibiae more reddish

C. nearctica

Western

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C. setipes

Western

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C. tinctinervis

Far north

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C. varians

Northern Canada, AK

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C. verna

Canada, NH, VT, ME

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Coenosia

  • C ending at apex of M
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Without posteroventral bristle on medial hind tibia

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widespread

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Limnospila albifrons

  • C ending at apex of M
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Without posteroventral bristle on medial hind tibia
  • Evenly light grey body
  • Ocellar triangle white to silvery pruinose
  • Frons as wide as anterior pair of dorsocentral bristles

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widespread

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Macrorchis

  • C ending at apex of M
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Without posteroventral bristle on medial hind tibia
  • Fore and mid tibiae yellow

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See key in Huckett 1936

widespread

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Fore femora

Mid and hind femora

Hind tibia

M. ausoba

widespread

Entirely yellow

Entirely yellow

One long anteroventral bristle

M. alone

AK, northern Canada

Dorsally blackened

Entirely yellow

Two subequal long anteroventral bristles

M. majuscula

OR, WA

Mostly blackened

Mostly blackened

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Neodexiopsis

  • C ending at apex of M
  • Two pairs of presutural dorsocentral thoracic bristles
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Hind femur subapically with one anterodorsal, one posterodorsal, and one posterior bristle, unlike Coenosia
  • Without posteroventral bristle on medial hind tibia

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?

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Pentacricia

  • Along with S. mexicana, distinctive spindly appearance and dilute wing flecks.

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Northeastern US, Canada

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Pseudocoenosia

  • C ending at apex of M
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Without posteroventral bristle on medial hind tibia

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?

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Schoenomyza

  • C ending at apex of M
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Without posteroventral bristle on medial hind tibia

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?

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Pachyceramyia

  • Along with S. mexicana, distinctive spindly appearance and dilute wing flecks.

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Northeastern US, Canada

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Limnophorini

  • Limnophora
  • Lispe
  • Lispoides
  • Spilogona
  • Tetramerinx

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Limnophora

  • ?

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widespread

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Lispe

  • ?
  • ​

widespread

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Lispoides

  • ?

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widespread

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Spilogona

  • ?

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widespread

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Tetramerinx

  • C ending at apex of M
  • Three pairs of postsutural dorsocentral thoracic bristles
  • Without posteroventral bristle on medial hind tibia

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?

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Hawaiian species

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References

Sources for this entire project include:

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References

Other sources consulted for this specific document include:

  • Huckett, 1936. A Revision of Connectant Forms between Cœnosian and Limnophorine Genera Occurring in North America (Diptera, Muscidæ). Journal of the NY entomological Society. 44: 187-222.

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Special thanks to the work of John F. Carr and Aaron Schusteff with this group on BugGuide.net.

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