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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Acalyptratae" » Lauxanioidea » Lauxaniidae » Poecilominettia
Photo#1666727
lauxaniid - Poecilominettia
Copyright © 2019 Steve Scholnick

lauxaniid - Poecilominettia
Rockville, Montgomery County, Maryland, USA
May 27, 2019
Size: body 4mm
Keys out to Poecilominettia using the MND lauxaniid key (1). I don't have access to Shewell's paper (2) and I can't even find a full citation of Hendel's paper describing the genus. However, 2 of the possible 6 species are ruled out by the guide's photos (P. ordinaria and P. valida).

TIA

MND couplet #s and character states
1) anepimeron bare (checked under microscope)
4) costal setulae ending well before apex of R4+5, mid tibia with only 1 apical spur
6) anterior katepisternal seta shorter than posterior one but not hair-like
16) face flat & dull
19) postsutural intra-alar seta present
27) no additional crossvein beyond dm-cu
28) only 1 apical spur on mid tibia and lacking strong genal seta near lower margin of eye

Images of this individual: tag all
lauxaniid - Poecilominettia lauxaniid - Poecilominettia lauxaniid - Poecilominettia lauxaniid - Poecilominettia lauxaniid - Poecilominettia
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Contributed by Steve Scholnick on 27 May, 2019 - 5:29pm
Last updated 16 November, 2020 - 6:46am

Moved
Moved from Poecilominettia puncticeps.
… John F. Carr, 16 November, 2020 - 6:46am login or register to post comments

Moved
Moved from Lauxaniidae.
… John F. Carr, 28 May, 2019 - 3:54pm login or register to post comments

 
facial spot
according to Melander's 1913 paper, this species should have its "Face centrally marked with a velvet-black spot" and the length should be "2.5mm". I measured this fly against a ruler at 4mm frons to apex of abdomen.
I suppose the spot might be missing if this fly is teneral but don't know how to explain the dramatic size difference.
… Steve Scholnick, 28 May, 2019 - 4:16pm login or register to post comments

Moved
Moved from Flies.
… John F. Carr, 28 May, 2019 - 6:12am login or register to post comments

Don't know
I can't place it in the key by Malloch and McAtee (1924).
… John F. Carr, 28 May, 2019 - 6:12am login or register to post comments

 
no luck
Despite having found what I think is Hendel's 1932 paper and old descriptions of what are now the 6 species of Poecilominettia (from Malloch and McAtee (1924) and Melander (1920)) , nothing fits. Are we looking at the wrong family?
… Steve Scholnick, 28 May, 2019 - 3:30pm login or register to post comments

 
other angles?
I didn't take that many photos of this fly but I might have something useful if there's some feature not visible in these. I have the Malloch and McAtee paper and will try to make sense of this later today. Poecilominettia seems to have been constructed from species originally assigned to Minettia, Sapromyza, and Drosophila.
I wish Tom Murray had posted more photos of this one.
… Steve Scholnick, 28 May, 2019 - 11:54am login or register to post comments

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