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Subgenus Europhilus (Agonum Subgenus Europhilus)
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Agonum lutulentum
Photo#248881
Copyright © 2009
Tim Moyer
brown Carabid -
Agonum lutulentum
Medford, (~25 miles east of Philadelphia, PA) Burlington County, New Jersey, USA
June 1, 2008
Size: ~7.3mm
here's a nice brown Carabid. further suggestions welcome :)
came to UV light
Images of this individual:
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Contributed by
Tim Moyer
on 13 January, 2009 - 2:28pm
Last updated 13 January, 2009 - 9:09pm
Thanks Peter,
Starting from the genus, yes, this one does appear to key to A. lutulentum. Matches LeConte's
type
at the MCZ well also. Of note, the MCZ has this listed under "A. lutulentus", ending with an 's', matching the species label shown with the beetle. A check on ITIS has "A. lutulentum" as valid, and no record of "lutulentus".
…
Tim Moyer
, 13 January, 2009 - 9:15pm
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Another case of sloppy nomenclature
in which former name
Platynus lutulentus
is gender-consistent but later citations frequently perpetuated gender mismatch as "
Agonum lutulentus
".
…
Peter W. Messer
, 14 January, 2009 - 12:21am
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latin?
thank Peter, but I'm so ignorant I don't understand your comment. Are you saying there are latin grammer rules which change the species name depending on the gender of the Genus name? Is there a reference you can recommend so I can learn these things? (there's probably a second grader somewhere that can school me)
Thanks,
Tim
…
Tim Moyer
, 15 January, 2009 - 1:05pm
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Yes, gender of genus and species should be same.
If I recall correctly
Platynus lutulentus
is masculine;
Agonum lutulentum
is neuter. I'll double check this later. Off hand I can't recall a specific reference that would be useful to you.
…
Peter W. Messer
, 15 January, 2009 - 4:11pm
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Some guidelines for Latinized gender.
Masculine endings: -us, -ys, -ops,
Feminine endings: -a (except -ma neuter), -is, -yx
Neuter endings: -um, -om, -on, -ma
This is only a partial list so I may return to it later. There are complications, for example, -es ending could be either feminine or masculine.
…
Peter W. Messer
, 17 January, 2009 - 11:11am
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Moved
Moved from
Ground Beetles
.
…
Tim Moyer
, 13 January, 2009 - 9:09pm
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Agonum (subgenus Europhilus) likely.
Blackish head which contrasts with equally brownish pronotum + elytra favors member
Agonum lutulentum
in that subgenus. Members are easily separated by scoping.
…
Peter W. Messer
, 13 January, 2009 - 6:34pm
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Comment removed
...
…
Harry Zirlin
, 13 January, 2009 - 3:05pm
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