undescribed Elaphropus near microspilus - Elaphropus undescribed-cf-microspilus - BugGuide.Net

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Trechinae » Bembidiini » Tachyina » Elaphropus » subgenus Barytachys (Elaphropus subgenus Barytachys) » Elaphropus undescribed-cf-microspilus

Photo#1574464

Copyright © 2018 photo: Xanthe Shirley

undescribed Elaphropus near microspilus - Elaphropus undescribed-cf-microspilus

5 mi N Georgetown, Willamson County, Texas, USA
June 12, 1975
Size: ~3.4 mm

Terry Erwin's comment on the photos: "...a new species, also <found> in AZ, that seems related to E. microspilus Bates (of Central America); there is a complex of new species with more or less this elytral pattern."
specimen in TAMUIC

Images of this individual: tag all

undescribed Elaphropus near microspilus - Elaphropus undescribed-cf-microspilus

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Contributed by v belov on 13 August, 2018 - 11:57am

Beautiful beast!

Totally unlike any others in the guide, to my eye.

… Curt Harden, 26 April, 2020 - 8:07pm

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Yes, this one is more like LeConte's type

which appears fatter than the "obesulus" suggested for BugGuide's Arizona example. Makes you wish you had them all under scope for comparison!

… Peter W. Messer, 26 April, 2020 - 9:40pm

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I have called it Elaphropus obesulus (LeConte, 1852)

based on a similar examined specimen from Arizona which fits Hayward's 1900 key (p202) and description (p210). The humeral and subapical spots are faded on LeConte's old type specimen; type location is in Arizona. Hayward's concept of obesulus is large body size (3 - 3.75 mm) with proportionately obese elytra, usually with spots, elytral stria laterad #1 obsolete, antennae pale basally. I was unaware of Elaphoropus microspilus (Bates 1882: 142) which I should seek and compare. Type location of latter is Guatemala and Nicaragua. Rather than that species, a complex surrounding E. microspilus is being considered. I would be curious to get more of Terry Erwin's opinion. If they are conspecific (unlikely), then LeConte wins the senior synonym. For now I posted this apparent range extension to Texas at the post-2012 caraboid registry under the placeholder name Elaphropus obesulus.

… Peter W. Messer, 13 August, 2018 - 6:36pm

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