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Genus Merocoris

Leaffooted Bug - Merocoris distinctus Merocoris Merocoris distinctus Merocoris distinctus Merocoris distinctus BugTBID05142014FW - Merocoris ID? - Merocoris Merocoris
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Pentatomomorpha
Superfamily Coreoidea (Leatherbugs)
Family Coreidae (Leaf-footed Bugs)
Subfamily Meropachyinae
Genus Merocoris
Explanation of Names
Merocoris Hahn 1834
some sources list as Merocoris Perty 1830
Numbers
3 spp. in our area, all in the subg. Corynocoris Mayr 1866, 8 spp. in 2 subgenera total(1)
Identification
As a genus, form is distinctive. Identification of species appears to be difficult. Differentiating our spp. [adapted from (2)]:
Merocoris typhaeus
Head subtriangular, prolonged forward between the bases of the tubercles bearing the antennae;
interocular space with short tubercle near the inner border of each eye;
antennal segment I subclavate (somewhat club-shaped), tapering toward the base from the middle and finely pubescent
Merocoris distinctus
Head nearly quadrate (square), not prolonged forward as in typhaeus;
interocular space unarmed (no tubercle as in typhaeus);
antennal segment I stout, constricted basally only, and densely pubescent with hairs thick and bristle-like (compare typhaeus)
Differentiating from curtatus:
Antennal segment IV elongate, subequal to or longer than II and III taken together;
humeral angles obtuse
Merocoris curtatus
Head nearly quadrate (square), not prolonged forward as in typhaeus;
interocular space unarmed (no tubercle as in typhaeus);
antennal segment I stout, constricted basally only, and densely pubescent with hairs thick and bristle-like (compare typhaeus)
Differentiating from distinctus:
Antennal segment IV robust, shorter than II and III taken together;
humeral angles subacute, more or less bifid (deeply cleft)
Range
subg. Corynocoris across NA, the nominate subg. restricted to S America(1)
our spp.:(3)(4)*
M. curtatus TX-CA-CO
M. distinctus QC-MD-AL to AB-NM
M. typhaeus NY-FL-UT-CA
_________________________
*there is "an unusual lack of agreement... as to the taxonomic level of the categories within this genus"(4)
Works Cited
1.Livermore L.J.R., Lemaître V.A., Dolling W.R., Webb M.D. Coreoidea species file online. Version 5.0
2.New species of Merocoris (Merocoris) Perty from Brazil, with keys to known subgenera and species of the tribe Merocorini...
Brailovsky H., Barrera E. 2009. Fla. Entomol. 92: 134-138.
3.Checklist of the Hemiptera of Canada and Alaska
Maw, H.E.L., R.G. Foottit, K.G.A. Hamilton and G.G.E. Scudder. 2000. NRC Research Press.
4.Catalog of the Heteroptera, or True Bugs of Canada and the Continental United States
Thomas J. Henry, Richard C. Froeschner. 1988. Brill Academic Publishers.