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Genus Anchonoderus

Carabid - Anchonoderus horni Anchonoderus quadrinotatus Horn - Anchonoderus quadrinotatus Anchonoderus quadrinotatus Horn - Anchonoderus quadrinotatus Anchonoderus quadrinotatus Horn - Anchonoderus quadrinotatus Anchonoderus quadrinotatus Horn - Anchonoderus quadrinotatus Anchonoderus horni Csiki - Anchonoderus horni Anchonoderus quadrinotatus Horn 1878 - Anchonoderus quadrinotatus - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga
Family Carabidae (Ground Beetles)
Subfamily Harpalinae
Supertribe Harpalitae
Tribe Lachnophorini
Genus Anchonoderus
Explanation of Names
Anchonoderus Reiche 1843
Numbers
Total of 26 species (1) of which only three species (updated from previous two) are known in USA.
Identification
NB: Members of Anchonoderus are superficially quite similar to Oxypselaphus pusillus and Atranus pubescens. Their differences are addressed in the keys on page 41 (couplets 66-67) and page 58 (couplet 20) of American Beetles (2).

Key to the three American species of Anchonoderus.
A. quadrinotatus Horn: known TX. See type images posted under MCZ #8182. Elongated pronotum; most setose; dark elytra w 4 pale macules; ABL ~ 7 mm.

A. schaefferi Liebke (syn. A. unicolor Schaeffer): known AZ, TX. Elytra broader & pronotum shorter; dorsal setae shorter/sparser; elytra uniformly black without macules; ABL ~ 7 mm.

A. horni Ciski (syn. A. apicalis Horn): known Baja MX, TX (rec. n.). Habitus like A. schaefferi but elytra fusco-testaceous with apices irregularly darker (piceous); ABL ~ 7 mm.
Range
Neotropical genus ranging into sw. US (TX-AZ)(1)
Habitat
Along slow-flowing water courses; adults run on sand/mud or rest under rocks(2)
Works Cited
1.Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico
Bousquet Y. 2012. ZooKeys 245: 1–1722.
2.American Beetles, Volume I: Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia
Arnett, R.H., Jr., and M. C. Thomas. (eds.). 2000. CRC Press LLC, Boca Raton, FL.