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Species Mordellistena trifasciata

Tumbling Flower Beetle - Mordellistena trifasciata Mordellistena trifasciata Mordellidae, head - Mordellistena trifasciata Mordellistena trifasciata? - Mordellistena trifasciata Tumbling Flower Beetle - Mordellistena trifasciata Mordellid - Mordellistena trifasciata Mordellid - Mordellistena trifasciata Mordellistena trifasciata?? - Mordellistena trifasciata
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Tenebrionoidea (Fungus, Bark, Darkling and Blister Beetles)
Family Mordellidae (Tumbling Flower Beetles)
Tribe Mordellistenini
Genus Mordellistena
Species trifasciata (Mordellistena trifasciata)
Synonyms and other taxonomic changes
Mordellistena trifasciata (Say)
Orig. Comb: Mordella trifasciata Say, 1862
M. lepidula LeConte 1862, and M. amica LeConte 1862, both synonomized by Ljleblad (1945) (1) to Mordellistena trifasciata (Say).
There are 117 spp. n. of Mex in the genus (2)

Mordellistena trifasciata (Say)
Det. T. R. Moyer, 2009
TX-GA-ME-IA (1),(3),(BG data)
mostly June-Aug (1),(BG data)
21 spmns coll. May-July, Sept in c. TX (3)
Re: Mordellistena sexnotata Dury in central Texas.
M. sexnotata Dury was described in 1902 from a single specimen coll. in KY. Liljeblad (1945) examined Dury's type and found only one other spmn, from NM, that he determined as matching Dury's type. (1)
Somewhat surprisingly, John Jackman determined 35 of the 106 mordellid spmns collected in 1993-94 in w. Travis Co., TX as M. sexnotata Dury and none as the widely dist. Mordellistena trifasciata (Say). (4)
However, for a different survey published in 1995, Jackman determined 21 mordellid spmns (out of 754) coll. in c. Travis Co. as M. trifasciata (Say) and none as M. sexnotata Dury!
Note that 32 of the 35 spmns determined as sexnotata were collected on TX red oak (4), a locally common species present at both Travis County survey sites.
Similarly, Riley's (2011) ongoing intensive survey of two sites in nearby College Station only reports M. trifasciata (Say). (5) Jackman would have determined most of the College Station mordellids before his death there in 2008.
In conclusion, I think Jackman's early determination of c. TX spmns as M. sexnotata Dury was possibly in error.
See Also
Liljeblad (1945) (1) states that M. trifasciata always has the elytra terminating with black whereas M. sexnotata always requires a pale apex.
Print References
Dury, C. 1902. A revised list of the Coleoptera observed near Cincinnati, Ohio, with notes and references on localities, bibliographical references, and a description of new species. Journal of the Cincinnati Society of Natural History 20: 107–189.
Lu, W. 1997. Notes on identification and ecology of tumbling flower beetles (Mordellidae) from Ossabaw Island, Georgia. Florida entomologist, 80(1): 95-98. Full PDF
Works Cited
1.Monograph of the Family Mordellidae (Coleoptera) of North America, North of Mexico
Emil Liljeblad. 1945. University of Michigan Press.
2.Taxonomic changes for fifteen species of North American Mordellidae (Coleoptera)
A.E. Lisberg. 2003. Insecta Mundi 17(3-4): 191-194.
3.Diversity and phenology of tumbling flower beetles (Coleoptera: Mordellidae) captured in a malaise trap.
Jackman and Nelson. 1995. Entomological News 106(3): 97-107.
4.Abundance and distribution of potential arthropod prey species in a typical Golden-cheeked Warbler habitat.
Quinn, M.A. 2000. Unpublished Thesis. Texas A&M University, College Station. ix + 182 pp.
5.An Illustrated Inventory of the Beetles (Coleoptera) of Lick Creek Park, College Station, Texas
Edward G. Riley. 2013. Texas A&M University, Dept. Entomology, College Station.