Isorhipis obliqua (Say)

Ferro, Michael L., Gimmel, Matthew L., Harms, Kyle E. & Carlton, Christopher E., 2012, Comparison of Coleoptera emergent from various decay classes of downed coarse woody debris in Great Smoky Mountains National Park, USA, Insecta Mundi 2012 (260), pp. 1-8 : 26

Isorhipis obliqua (Say) ( Fig. 40 )

Range: northeastern North America , south to Georgia, west to Texas and Wyoming. Habitat: in deciduous and spruce forests, emergent from beech, elm, birch, and heartwood of decayed maple. Collection Method: emergence, flight intercept trap. Biology: larvae bore from sapwood to heartwood and return to surface to pupate, adults and immatures overwinter, pupal stage is very short, may produce mating swarms. Present Study: significantly higher abundance in CWD2 and secondary forest. References: Knull 1946 ; Peterson 1960 (illustrated larva); Downie and Arnett 1996; Peck and Thomas 1998; Muona 2000; Majka 2007b; Majka et al. 2011.

Melasis pectinicornis Melsheimer ( Fig. 41 )

Range: northeastern North America , south to Florida, west to Louisiana. Habitat: reported from maple, blackgum, oak, elm, birch, and beech. Collection Method: emergence. Biology: under bark of fallen maple and blackgum, emergent from dead birch and beech. Present Study: significantly higher abundance in CWD2 and secondary forest. References: Dury 1888 ; Blatchley 1910; Kirk 1922; Hopping 1926; Peterson 1960 (illustrated larva); Downie and Arnett 1996; Peck and Thomas 1998; Muona 2000.

Microrhagus subsinuatus LeConte ( Fig. 42 )

Range: northeastern North America, south to North Carolina, west to Wisconsin. Habitat: emergence from dead decayed beech, collected from alder, swept from milkweed. Collection Method: emergence, flight intercept trap, on vegetation. Biology: reported to be active on dead beech in daytime in June.

Present Study: not significantly associated with any substrate or forest type. References: Dury 1888; Knull 1946 (as Dirhagus imperfectus (LeConte)) ; Downie and Arnett 1996; Muona 2000; Majka 2007b; Majka et al. 2011.

Figures

Figures 39–44. Habitus images. 39) Isarthrus rufipes (Melsheimer) (Eucnemidae). 40) Isorhipis obliqua (Say) (Eucnemidae). 41) Melasis pectinicornis Melsheimer (Eucnemidae). 42) Microrhagus subsinuatus LeConte (Eucnemidae). 43) Bacanius tantillus LeConte (Histeridae). 44) Agathidium sp. (female) (Leiodidae: Leiodinae).