Trox paulseni (Coleoptera: Trogidae), a new species from Nebraska and Kansas, USA Author Ratcliffe, Brett C. text Insecta Mundi 2016 2016-05-13 2016 482 1 6 journal article 10.5281/zenodo.5170607 1942-1354 5170607 18ADB494-C2F3-4146-B71D-18D8A5DBE0B8 Trox paulseni Ratcliffe , new species ( Fig. 1, 3, 5–6 , 8 ) Type Material. Holotype male ( UNSM ) labeled: a) “ Long Pine , Brown Co. / NEBRASKA / VI-19-1975 / B. C. Ratcliffe ”; b) ex Collection of / B. C. Ratcliffe / Donated 2001”; c) my red holotype label . Allotype female ( UNSM ) labeled as holotype and with my red allotype label. Five paratypes , 3 males , 2 females (3 at MJPC , 2 at FSCA ) labeled: “ USA : NEBRASKA : Frontier / Co.: Red Willow Reservoir / SWMA: coyote scat / 40.40, -100.68, 800m / 16.V.2013 ; coll. MJ Paulsen ”. One paratype female ( MJPC ) labeled “ NEBRASKA : ANTELOPE/ / BOONE co. line; 11 mi SW / of Elgin; 600m ; 41.91533 / -98.27674 ; coyote scat / 24.VI.2009 ; MJ Paulsen”. One paratype male ( UNSM ) labeled: a) “ West Point / Neb.”; b) “ Trox / insularis / Chevrolat / det. Dawson ”; one paratype male ( UNSM ) labeled: a) “Sandhills Ag Lab / McPherson Co. , Nebraska / VII-8-14-1973 ; b) ex Collection of / B. C. Ratcliffe / Donated 2001”. Two paratypes , 1 male , 1 female ( UNSM ), labeled: a) “ USA : NEBRASKA : Rock / Co.: 11 km W of Rose / 42.222 , -99.640 ; 770m / pitfall trap in wet meadow / 2.VI.2015 ; Patrick Wagner ”. Two paratype males ( UNSM ), labeled: a) “ USA : NEBRASKA : Brown / Co.: nr. Clapper Lake , 32km / S of Johnstown ; 42.321, / -100.069; 850m ; pitfall trap / 30.VII.2015 ; Patrick Wagner ”. Eighteen paratypes , 10 males , 8 females (4 at UNSM , 10 at MJPC , 2 at CMNC , 2 at BMNH ) labeled: “ USA : NEBRASKA : Frontier / Co.: Red Willow Reservoir / SWMA: coyote scat / 40.40, -100.68, 800m / 9.III.2016 ; coll. MJ Paulsen ”. Five paratypes , 3 males , 2 females , (3 at MJPC , 2 at UNSM ) labeled: a) “ USA : NEBRASKA : Johnson / Co.: Hickory Ridge SWMA / 40º 18.966, -96º 21.341 / 425m ; coyote scat in prairie / 14.III.2016 , M.J. Paulsen ”. Seven paratypes , 6 males , 1 female ( SEMC ) labeled: a) “ USA : KANSAS : Kiowa / Co., 10 mi NW Mullinville / 23 Feb. 1998 , G. Salsbury / Coyote dung”; b) “ Trox / hamatus / Robinson ”; c) SEMC barcode database labels SEMC0926916 – SEMC0926920 , SEMC0926929 . One male paratype ( GASC ) labeled “ USA : Kansas : Clark Co / State Lake , 13-26 Mar / 2003 , coyote dung / G A Salsbury”. One male paratype ( GASC ) labeled “ USA : Kansas : Crawford Co / 2W Pittsburg, 14-23 Apr / 2004 , canopy trap / G A Salsbury”. All paratypes with my yellow paratype labels . Holotype . Male ( Fig. 1 ). Length 6.0 mm; width across humeri 3.0 mm. Head: Frons with 4 low tubercles in transverse row (best seen in dorsal view). Clypeus triangular. Antenna reddish brown. Pronotum: Surface with moderately large punctures (usually obscured by tomentosity), and with 4 large, round, shallow foveae; 2 in center between median longitudinal ridges and 1 at each base either side of middle. Sides weakly arcuate, posterior angles obtusely right angled. Setae on lateral and basal margins short, thick, subcontiguous. Elytra: Surface tomentose with 4 elevated rows of tubercles between suture and humerus, top of each tubercle covered by cluster of short, stout, tawny setae. Sides weakly explanate, with a row of small granules. Marginal setae short, more slender than pronotal marginal setae, separated from one another by about 1 setal length. Legs: Protibia tridentate, apical 2 teeth subcontiguous. Metatibia broad, externally with weakly dentate, keel-like ridge ( Fig. 3 ); internally with large, subapical tooth usually partly concealed by long setae. Parameres: Apices of parameres bluntly rounded ( Fig. 6 ). Allotype . Female. Length 5.5 mm ; width across humeri 2.9 mm . The allotype does not differ from the holotype except in the following respects: Surface sculpturing more visible because of less tomentosity. Legs: Metatibia simple, lacking keel-like ridge on external surface and lacking subapical tooth on internal surface. Variation ( 29 male and 15 female paratypes ). Length 4.8–6.2 mm ; width across humeri 2.7–3.4 mm . The paratypes do not differ significantly from the holotype or allotype . Etymology. I am pleased to dedicate this species to its discoverer and my colleague, Dr. M. J. Paulsen (University of Nebraska State Museum, Lincoln, Nebraska ). Locality Records ( Fig. 8 ). Forty-six specimens examined. KANSAS (9): KIOWA CO. (7): 10 mi. NW of Mullinville; CLARK CO. (1): State Lake; CRAWFORD CO. (1): 2 mi. W Pittsburg. NEBRASKA (37): ANTELOPE/BOONE CO. (1): HWY 14 at county line; BROWN CO. (4): Clapper Lake, Long Pine; CUMING CO. (1): West Point; FRONTIER CO. (23): Red Willow Reservoir State Wildlife Management Figures 1–7. Two species of Trox . 1) Trox paulseni Ratcliffe , new species , holotype. 2) Trox hamatus Robinson. 3–5) Left metatibia, ventral view. 3) T. paulseni male. 4) T. hamatus male. 5) Trox paulseni female. 6–7) Parameres, dorsal view. 6) Trox paulseni . 7) Trox hamatus . Area; JOHNSON CO. (5): Hickory Ridge SWMA; McPHERSON CO. (1): Sandhills Ag Lab near Tryon; ROCK CO. (2): Rose. Additional collecting in Kansas and Nebraska will undoubtedly reveal more specimens of T. paulseni . In addition, specimens currently residing in museum collections identified as T. hamatus may actually be T. paulseni . Diagnosis. Trox paulseni and T. hamatus are superficially similar but may be distinguished by the metatibial external tooth nearly obsolete and instead keel-like in T. paulseni ( Fig. 3 ) (tooth large and distinct in T. hamatus , Fig. 4 ); apices of parameres bluntly rounded in T. paulseni ( Fig. 6 ) (apices acute in T. hamatus , Fig. 7 ); and color of the elytral scales: tawny in T. paulseni and dark orange in T. hamatus (compare Fig. 1–2 ).