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Schizogenius longipennis-group
Photo#1653737
Copyright © 2019
margarethe brummermann
ref photo for peter Messer -
Schizogenius longipennis-group
Portal , Cochise County, Arizona, USA
August 3, 2017
Size: 5.2 mm vs 5.0 by pwm
Contributed by
margarethe brummermann
on 21 April, 2019 - 5:45pm
Last updated 27 November, 2021 - 11:12am
Moved
Moved from
Schizogenius litigiosus
based on my restudy of Whitehead's 1972 key to the species and a re-examination of Margarethe's specimen corresponding to this post. There are three Arizona members in this group:
longipennis, chircahuanus, neovalidus
. Male genitalia study is required for secure separation of species. Whitehead's distinguishing external characters for this group depend on color and perhaps body size. Unfortunately color can be quite variable depending on maturity status. Tentatively I favor
chircahuanus
based on smallest size (~ 5 mm or less), front femur reddish, pronotum reddish (not readily visible in photo). I weighed the pronotal color as a heavier trait than elytral color, athough I admit Whitehead did the opposite.
…
Peter W. Messer
, 27 November, 2021 - 11:12am
-
ha! I posted my other comment too soon - would have been more appropriate here. I feel your pain.. Whitehead's paper is very painful to try to use.
…
Curt Harden
, 20 November, 2023 - 9:10pm
Moved
Moved from
Schizogenius
.
…
Peter W. Messer
, 5 January, 2020 - 9:04am
Schizogenius litigiosus Fall [Withdrawn]
Withdrawn.
…
Peter W. Messer
, 4 January, 2020 - 9:41am
Moved
Moved from
Ground Beetles
.
…
Curt Harden
, 22 April, 2019 - 10:29pm