Unknown Dytiscus - Dytiscus dauricus - BugGuide.Net

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Copyright © 2018 Randy Lauff

Unknown Dytiscus - Dytiscus dauricus -

Sunrise Valley, Victoria County, Nova Scotia, Canada
June 16, 2017
Size: 35 mm

This Dytiscus was caught at lights (part of a moth project). To me, it keys out to D. circumcinctus Ahrens, but that species is not known from around here (not too far away though). I'm basing this mostly on the yellow adjacent to the eye. The abdominal sternites I think are closer to D. dauricus Gebler.

Date corrected.

Images of this individual: tag all

Unknown Dytiscus - Dytiscus dauricus - male

Unknown Dytiscus - Dytiscus dauricus - male

Unknown Dytiscus - Dytiscus dauricus - male

Contributed by Randy Lauff on 7 June, 2018 - 8:07am
Last updated 12 January, 2020 - 12:20am

ID

This is most likely D. dauricus assuming body size is right. The eyes are only incompletely rimmed with yellow and the coloration of the abdominal sterna has too extensive dark markings for D. circumcinctus. The only other similar species is D. alaskanus, which is smaller in size and differs in characters of the aedeagus (dissection required).

… Tim Loh, 12 January, 2020 - 12:20am

Moved

Moved from Predaceous Diving Beetles.

… John F. Carr, 18 November, 2019 - 6:19am

Date is wrong

The date is "December 31, 1969" which is what the system puts in if it is confused by what you typed.

… John F. Carr, 18 November, 2019 - 6:19am

Dytiscus

Definitely Dytiscus, some part looks like D. circumcinctus, others D. dauricus. I don't think it is D. marinalis

… Matthew Pintar, 17 November, 2019 - 6:13pm

Moved

Moved from Beetles.

… Hisserdude, 27 October, 2018 - 7:49pm

It looks like the Dytiscus ma

It looks like the Dytiscus marginalis

… Marc loff, 30 August, 2019 - 2:22pm

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