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False Bombardier Beetles (Galerita)
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subgenus Progaleritina (Galerita subgenus Progaleritina)
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Galerita mexicana
Photo#230468
Copyright © 2008
margarethe brummermann
Dark-legged western -
Galerita mexicana
Amado reststop I 19, St Cruz County, Arizona, USA
September 27, 2008
Size: 17 mm
Images of this individual:
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Contributed by
margarethe brummermann
on 1 October, 2008 - 8:27pm
Last updated 2 October, 2008 - 11:18pm
Moved
Moved from
False Bombardier Beetles
.
…
Ted Kropiewnicki
, 2 October, 2008 - 11:18pm
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Galerita atripes [1] vs G. mexicana [2]
is what the key by Lindroth (1969) suggests for these two Arizona
Galerita
species with black antennae & legs but reddish pronotum. I'm not aware of a more recent key on Nearctic Galerita. Compare to
G. atripes
. If 17.0 mm apparent body length is indeed accurate (wishfully), this would favor [2]: 15.5 - 18 mm
vs
[1]: 17.5 - 20.8 mm. Lindroth says eyes are more prominent in [2], i.e., eye diameter somewhat greater than the extension of temple behind the eye. This main morphologic distinction is too subjective for me to apply reliably to the submitted image.
…
Peter W. Messer
, 2 October, 2008 - 1:15pm
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I am adding a head shot
…
margarethe brummermann
, 2 October, 2008 - 2:30pm
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Rarely do side shots help in carabid identification.
What is needed here is a clear, enlarged,
perpendicular
shot of head to asses eye size against temples. Even then I can't be sure that I'll feel confident in distinguishing the two species under consideration.
…
Peter W. Messer
, 2 October, 2008 - 3:40pm
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Ok, last try
…
margarethe brummermann
, 2 October, 2008 - 4:26pm
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Galerita mexicana
is now favored based on my subjective impression of markedly prominent eyes relative to posterior temples
and
your carefully measured body length of 16.9 mm. Thanks Margarethe for your persistence.
…
Peter W. Messer
, 2 October, 2008 - 5:10pm
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Thank you Peter!
…
margarethe brummermann
, 2 October, 2008 - 6:32pm
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16.9 mm
very accurately measured using callipers
…
margarethe brummermann
, 2 October, 2008 - 2:18pm
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Moved
Moved from
Galerita bicolor
.
…
margarethe brummermann
, 2 October, 2008 - 9:17am
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