Numbers
Five genera
Canthon; divided into three subgenera
Canthon (Canthon) Hoffmansegg 1817
Canthon (Boreocanthon) Halffter 1958
Canthon (Glaphyrocanthon) Martínez 1948
21 spp.
Deltochilum Eschscholtz 1822
2 spp.
Malagoniella Martínez 1961
Malagoniella astyanax yucateca (Harold 1863) recently refound in southmost Texas
Melanocanthon Halffter 1958
4 spp.
Pseudocanthon perplexus (LeConte 1847)
Identification
Canthonini have the hind
tibiae slender (left)
Key to the genera and subgenera of Canthonini (minus Malagoniella)
1(0) Anterior
tarsi absent ..................................
Deltochilum
1’ Anterior
tarsi present ................................... 2
2(1) Posterior
tibiae each with 2 terminal spurs .............
Melanocanthon
2’ Posterior
tibiae each with single terminal spur .......... 3
3(2)
Clypeus bidentate, or notched ........................... 4
3’
Clypeus quadridentate ..................................... 5
4(3) Color black, bronze, sometimes with greenish hue;
granulate; length 11-22 mm ....................................
Canthon, s. str.
4' Color bright green, or purple bronze in some specimens,
never gray or black; shiny; length 2-4 mm ....................
Canthon, subgenus Glaphyrocanthon
[note: the common eastern sp., C. viridis is almost always a brilliant green]
5(3) Anterior border of each posterior
femur without margin;
clypeus with teeth large; granulate black; length 4-10 mm .....
Canthon, subgenus Boreocanthon
5' Anterior border of each posterior
femur with margin;
clypeus with teeth small; shiny metallic; length 3-5 mm .......
Pseudocanthon
[note: this is quite similar in general habitus to
Ateuchus, but the slender legs will differentiate]
