Ataeniopsis regulus CEMT

Ataeniopsis regulus (Balthasar, 1947) Figs 8E–F, 39B Ataenius regulus Balthasar, 1947: 53. Ataenius bordoni Petrovitz, 1972: 166. Ataenius abdominalis Petrovitz, 1973: 154. Ataenius (Ataeniopsis) regulus – Chalumeau 1992: 196. Ataeniopsis regulus – Stebnicka 2003b: 105. Diagnosis Length 3.2–4.0 mm. Body piceous. Head alutaceous, clypeus with two minute denticles; weakly emarginate medially; emarginate area with approximately half the length of frons. Pronotum with punctures of two sizes, large and minute; large punctures everywhere distributed, intermixed with inconspicuously minute ones; pronotum with posterior marginal line. Elytral length approximately twice that of pronotum; interstriae with small, irregularly spaced punctures. Pygidium disc eroded by group of large coalescent punctures. Material examined BRAZIL – Mato Grosso • 1 spec.; Trindade, U.B.S.; 1 Oct. 1984; E. Binda leg.; light; CEMT • 1 spec.; same data as for preceding; INPA. – Roraima • 5 specs; Alto Alegre, Lavrado; 2°53′45″ N, 60°39′42″ W; elev. 81 m; 5 May 2015; E.G.F. Morais leg.; CEMT • 13 specs; Alto Alegre, Rio Cauamé, Fazenda Jarbas Melo; 3°13′34″ N, 61°09′54″ W; 16 Oct. 2020; R.C.L. Costa and R.B. Silva leg.; light; CEMT • 1 specs. Amajari, EsEc Maracá, Uraricoera River; 3°20′59″ N, 61°25′22″ W; elev. 83 m; 24 Mar. 2016; A.P.M. Santos et al. leg.; CEMT • 3 specs; Ilha de Maracá, Rio Uraricoera, Ilha de Maraca; 2–13 May 1987; J.A. Rafael et al. leg.; light trap; CEMT • 19 specs; same date as for preceding; INPA • 25 specs; same data as for preceding; armadilha suspensa [suspended trap]; CEMT INPA • 3 specs; same data as for preceding; 21–30 Nov. 1987; Malaise trap; INPA. Sexual dimorphism Males with third abdominal ventrite wider than fourth. Females with body longer than males, with second and fourth ventrite of the same width. Collecting information Specimens were collected with UV light traps in open areas, near ponds and coconut groves (Stebnicka 2009). Specimens were found at altitudes up to 81 metres.