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Anisodactylus - Anisodactylus agricola - male

Anisodactylus - Anisodactylus agricola - Male
Tippecanoe County, Indiana, USA
Size: 13 mm
Unfortunately, I have no date for this specimen.

Having some difficulty deciding on this Anisodactylus, between agricola Say vs. kirbyi Lindroth.

Characters: uniform dark color; front tibial spur not tridentate though swollen basally; mandibles not prolonged; hind tarsi longer, first segment longer than spur; distinct hind angles of pronotum, noticeably dentate; clypeus with one setigerous puncture on each side. This leads to the decision between A. agricola and A. kirbyi. I've had this ID'd as A. agricola but looking at it a second time I'm not as sure.

Supporting kirbyi: basal impressions of pronotum seem to have a slight linear shape anteriorly; short setae present dorsally on first two hind tarsomeres; hind angles more markedly toothed, which matches better with illustrations in Lindroth.

Supporting agricola: elytra do not seem noticeably dull and intervals not noticeably punctate; elytra broader behind middle; short metasternum (Lindroth notes that "This is the only species of Anisodactylus with wings so small, though reflexed at tip, that they must be regarded as non-functionary."; compared to the other Anisodactylus in my collection, the metasternum to metacoxal ratio is noticeably smaller in this specimen, which is a common external feature of reduced wing species).

Moved from Anisodactylus.

Anisodactylus agricola
make most sense among your two choices. I have specimens of A. agricola which support your imaged pronotum showing breadth clearly weighted to the front half. Also, very shiny elytra (only faint striate microsculpture) should clinch it. At high power I see tiny punctulae scattered atop shiny intervals of elytra.

Thanks Peter
I also see tiny punctulae on some interval, but they are very indistinct on the otherwise relatively shiny intervals.

looks a lot like A. binotatus to me... nah, not really...

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