Stenocrates hastatus Ratcliffe, 2015

Ratcliffe, Brett C., 2015, A Revised Catalog of the Species ofStenocratesBurmeister (Coleoptera: Scarabaeidae: Dynastinae: Cyclocephalini), with Descriptions of Three New Species from Peru and Brazil andStenocrates inpaiRatcliffe, 1978 Placed in Junior Synonymy withStenocrates popeiEndrödi, 1971, The Coleopterists Bulletin 69 (4), pp. 773-779 : 775

Stenocrates hastatus Ratcliffe , new species ( Figs. 5–6 )

Type Material. Holotype labeled “ BRAZIL: RJ/Rio das Ostras/ III-2011 100 m / E. J. Grossi ” and with my red holotype label . Allotype with same data and my red allotype label. One male and one female paratype with same data and each with my yellow paratype label. One male and one female paratype labeled “ BRAZIL, Esp. Santo/40 k no Linhares/17-19-X-82/Col: Dr. L. Gomez ” and each with my yellow paratype label. Two males and one female labeled “Guapi, Braz/Mar.3.1935/ P. Sandig ” and each with my yellow paratype label .

Holotype and allotype deposited at the University of Nebraska State Museum (Lincoln, NE, USA) . Three paratypes deposited in the US National Museum ( USNM) (Washington, DC, currently at the University of Nebraska for offsite enhancement), one paratype deposited in the Museu Naçional (Rio de Janeiro, Brazil) , and three paratypes in the B. C. Ratcliffe Collection (Lincoln, NE, USA) .

Description of Holotype. Male. Length 20.8 mm; width 10.1 mm. Color black. Head: Frons shiny, with sparse micropunctures. Frontoclypeal suture impressed, distinctly broader at middle, ridge in front of suture distinctly carinulate either side of depressed center. Clypeus transversely rugose; apex weakly emarginate, narrowly reflexed, anterior face thickened. Interocular width equals 3.0 transverse eye diameters. Antenna with 10 antennomeres, club subequal in length to antennomeres 2–7. Pronotum: Surface shiny, nearly smooth, except for a few small punctures on disc and a field of large, moderately dense punctures in both posterior and anterior angles. Lateral margins with thick marginal bead, base without marginal bead. Elytra: Surface shiny, with punctate sutural stria and 2 pairs of distinct discal striae and 1 pair of striae behind humerus; each stria comprised of large, deep, umbilicate, closely adjacent punctures. First broad interval with an irregular row of similar punctures, second broad interval with punctures only on apical third. Pygidium: Surface shiny, completely and densely punctate, punctures moderately large, deep, glabrous. In lateral view, surface regularly convex. Legs: Protibia tridentate, basal tooth slightly removed from other teeth. Metatarsus incomplete but, if complete, shorter than metatibia. Venter: Prosternal process columnar, long, thick, apex flattened into longitudinally oval disc. Parameres: Form widest at about middle, apices elongate, lanceolate ( Figs. 5–6 ).

Allotype. Female. Length 21.9 mm; width across humeri 10.4 mm. The allotype does not differ significantly from the holotype. The prosternal process is tapered into an elongate cone.

Variation. Males (5 paratypes). Length 19.5– 20.5 mm; width across humeri 9.8–10.6 mm. The male paratypes do not differ significantly from the holotype. The two specimens from Espírito Santo have the pronotum and first broad elytral interval slightly more densely punctate. All paratypes have the second broad interval punctate on the posterior half .

Females (2 paratypes). Length 21.2–21.6 mm; width across humeri 10.3–10.4 mm. The female paratypes do not differ significantly from the allotype except that both have the prosternal process similar to that of the holotype, and the Rio de Janeiro specimen has the second broad elytral interval punctate on the posterior half .

Etymology. The specific epithet is derived from the Latin, hasta, meaning a spear, and is used here as hastatus to indicate the spear-shaped parameres ( Fig. 5 ).

Distribution. Stenocrates hastatus is known from southeastern Brazil.

Locality Records. BRAZIL (9): ESPÍRITO SANTO (2): Linhares (40 km NW) . RIO DE JANEIRO (7): Guapimirim, Rio das Ostras .

Temporal Distribution. March (7), November (2).

Diagnosis. Stenocrates hastatus will key to Stenocrates celatus Prell in Endrödi (1985), and S. celatus is the only other species in the genus with a lanceolate apex of the parameres. The two species differ in that S. hastatus has sparse micropunctures on the frons (with small, dense punctures in S. celatus ), the pronotum has punctures mostly in the posterior and anterior angles (with large, moderately dense punctures on each lateral third in S. celatus ), and the parameres are widest at about the middle (widest just below the middle in S. celatus ) and with their apices narrowly lanceolate (broadly lanceolate in S. celatus ) (compare Figs. 5 and 7 ).

Figures

Figs.3–6. Stenocrates species, parameres. 3) S. howdeni; 4) S. laborator; 5–6) S. hastatus. Illustrations in Figs. 3–4 from Dechambre and Hardy (2004).

Fig. 7. Stenocrates celatus, parameres.