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Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

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Genus Megasternum

Megasternum obscurum (Marsham) - Megasternum obscurum Megasternum posticatum (Mannerheim) - Megasternum posticatum tiny hydrophilid? - Megasternum posticatum Small beetle - Megasternum posticatum Water Scavenger Beetle- maybe Megasternum posticatum - Megasternum concinnum Water Scavenger Beetle- maybe Megasternum posticatum - Megasternum concinnum Water Scavenger Beetle- maybe Megasternum posticatum - Megasternum concinnum Aquatic beetle? - Megasternum posticatum
Classification
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 Staphyliniformia)
Superfamily Hydrophiloidea (Water Scavenger and Clown Beetles)
Family Hydrophilidae (Water Scavenger Beetles)
Subfamily Sphaeridiinae
Tribe Megasternini
Genus Megasternum
Explanation of Names
Megasternum Mulsant 1844
Numbers
3 spp. (of which one adventive) in our area, 5 total(1)
Identification
Prosternum noncarinate, forming a flat plate in the middle, emarginate posteriorly to receive anterior end of mesosternum. Can be distinguished from Cryptopleurum by the emarginate front tibia, indistinct separation between the frons and clypeus, and glabrous (nonpubescent) dorsal surface.(1)
Habitat
leaf litter etc. rotting organic matter(1)
Works Cited
1.Review of the Family Hydrophilidae of Canada and Alaska
Ales Smetana. 1988. Entomological Society of Canada.