Selenophorus gagatinus Dejean, 1829

Rajab, Abubakarsidiq Makame, 2021, Indoor Radio Map localization WiFi fingerprint datasets, The Coleopterists Bulletin 75 (1), pp. 9-55 : 31

Selenophorus gagatinus Dejean

( Fig. 15 )

Selenophorus gagatinus Dejean 1829: 112 . Type locality: North America; restricted to Massachusetts (Arlington, Middlesex Co.) by Lindroth (1968: 824). Types: MNHN.

Selenophorus maurus Haldeman 1843: 301 . Type locality: southeastern Pennsylvania. Types: MCZ.

Selenophorus viridescens LeConte 1847: 392 . Type locality: New York (Long Island) . Types:MCZ #5921.

Descriptive Notes. Pronotum strongly convex, with microsculpture weakly impressed in area of hind angles, nearly vanished along sides; basal impressions well defined, coarsely punctate. Dorsum and elytral epipleura uniformly black. Elytra very shiny, not iridescent, with microsculpture moderately transverse, weakly impressed, with intervals moderately to densely punctulate. Femora piceous contrasting with lighter tibiae. Median lobe with dorsoapical plate short, without lip, apex slightly bent ventrad. Endophallus with darkly pigmented oblong scaly field near apex in left half of ostium. ABL 6.5–7.5 mm.

Range. CAN: NB, NS, ON, QC; USA: AL, AR,?AZ, CT, DC, FL, GA, IL, IN, MA, MD, ME, MI, MO, NC, NH, NJ, NY, OH, OK, PA, RI, SC, TN*,?TX, VA, VT, WI, WV.

Remarks. This species is distinguished from similar dark specimens of S. semirufus by the following characters: pronotum strongly convex with convexity extending to hind angles, this area often flattish in S. semirufus ; lateral sides and hind angle areas with microsculpture weakly, indistinctly impressed; forebody consistently black; labrum dark brown to black, not orange or reddish-brown as in S. semirufus ; femora much darker than rest of legs. Horn (1880: 181) suggested that Arizona specimens with forebodies rufopiceous were immature S. gagatinus . However, Bousquet (2012) listed Texas as the likely southwestern limit for S. gagatinus , while 19 th century records from southern Arizona needed confirmation.We did not encounter examples of this species from either Arizona or Texas. Light and dark specimens of S. semirufus from Texas and southwestern states were frequently misidentified as S. gagatinus . The literature-based records of S. gagatinus in Texas require confirmation.

Figures

Figs. 15–18. Habitus images of Selenophorus species, dorsal aspect. 15) S. gagatinus; 16) S. concinnus; 17) S. semirufus; 18) S. schaefferi.