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Species Selenophorus trepidus - Selenophorus near trepidus

Selenophorus trepidus - male Selenophorus trepidus - female Selenophorus trepidus Selenophorus trepidus - female Selenophorus trepidus - female Selenophorus trepidus - female Selenophorus trepidus Selenophorus near trepidus - Selenophorus trepidus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Carabidae (Ground Beetles)
Subfamily Harpalinae
Supertribe Harpalitae
Tribe Harpalini
Subtribe Harpalina
Genus Selenophorus
No Taxon (subgenus Selenophorus)
Species trepidus (Selenophorus near trepidus)
Synonyms and other taxonomic changes
The Texas population represents a species taxonomically near Selenophorus trepidus (Casey, 1924) which is restricted to southern Florida. The two species define the "trepidus complex", a subset of the opalinus species group sensu Lindroth (1968) which in turn fits under the historical genus Hemisopalus sensu Casey (1914). Hemisopalus is currently absorbed by the nominotypical subgenus Selenophorus sensu Lorenz (2005) and sensu Bousquet (2012).
Explanation of Names
"trepidus" = restless
Size
Body length 7.3 - 8.5 (- 8.8) mm where avg ♂ < ♀
Identification
A forthcoming review of Nearctic Selenophorus by Messer & Raber will report that the southeastern Texas population is a new species separate from very similar S. trepidus which is restricted to southern Florida. Superficially the species of southeastern Texas and S. trepidus of Florida appear like small versions of the common and widespread S. opalinus. Externally the two species are distinguished from S. opalinus by the following characters per PWM:
(1) Smaller body size (ABL ≤ 8.8 mm vs opalinus ≥ 9 mm);
(2) Pronotum with punctulae near base fewer and finer;
(3) Pronotum with maximum width slightly anterior to middle and with sides somewhat straightening posteriad (vs evenly curved in opalinus)
(4) Elytra with punctulae on intervals much sparser & much finer;