Dichotomius (Luederwaldtinia) iannuzziae, Valois & Vaz-De-Mello & Silva, 2017

Valois, Marcely C., Vaz-De-Mello, Fernando Z. & Silva, Fernando A. B., 2017, Taxonomic revision of the Dichotomius sericeus (Harold, 1867) species group (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 4277 (4), pp. 503-530 : 522-524

Dichotomius (Luederwaldtinia) iannuzziae sp. nov.

( Figs 8 a–h, 10g, 12a)

Etymology. Named after Prof. Luciana Iannuzzi as gratitude for many years of our fruitful collaboration.

Material examined. Type material, Holotype. BRAZIL: BAHIA: Porto Seguro, Reserva Ecológica do Pau Brasil , [-39,233766; -16,512466], 2-6.I.1990, E. & P. Grossi — 1♂ ( CEMT) . Paratypes [175 males and 185 females]. BRAZIL: ALAGOAS: Ibateguara, Cachoeira , II.2008, B.K.C. Figueiras — 4♂ ( CEMT) ; same data but Capoeirão , 17.I.2008 — 1♂ ( CEMT) ; same data but Encanamento , 16.I.2008 — 1♂ 1♀ ( CEMT) ; same data but Coimbra, IX.2007 — 2♂ ( CEMT) ; same data but ( Varjão ), 19.IX.2007 — 1♂ 1♀ (CE-UFPE); PERNAMBUCO: Cabo, Reserva Ecológica de Gurjaú, XI.2003, S. Santos — 1♂ ( CEMT) ; same data but 01.VI.2003 — 1♀ ( CEMT) ; Sirinhaém, Usina Trapiche, Tauá fragment, XII.2010, R. P. Salomão — 3♂ 3♀ ( CEMT) ; same data but 76msl (8°33'16"S, 35°9'27"W), 26.Vii.2010, Pitfall ( Fezes ) — 1♂ (CE-UFPE); Caruaru, [36°01'W, 8°09'S], 03.V.2008, F. Silva — 3♂ 2♀ (MZUFPA) ; same data but 06. VII.2012, F. Silva — 2♂ 2♀ (MZUFPA) ; same data but 05. VII.2012, F. Silva — 3♂ 4♀ (MZUFPA) ; same data but 02-04.VI.2011, Brejo de Altitude, F. Silva — 1♂ 1♀ (MZUFPA). Camaragibe, Aldeia, (7.977°S, - 35.006°W), 100m, 01-30.V.2016, P. C. Grossi— 22♂ 56♀ ( CERPE) . BAHIA: Eunápolis , [-39,068674; -16,47638], XI.1996, J.N.C. Louzada — 4♂ 3♀ ( CEMT) ; Igrapiuna, Vila 5, (39°10'03"W; 13°48'08"S), X.2010, R. Carvalho— 3♀ ( CEMT) ; same data but Pancada Grande , (13°48'08"S; 39°10'3"W), 19.V.2010 — 5♂ ( CEMT) ; Ilhéus , [-39,046494; -14,792808], V.2000, V. A. Melo — 1♂ 2♀ ( CEMT) ; same data but Fazenda Dichma , II.1995, C. Sperber— 3♂ 2♀ ( CEMT) ; same data but 21.II.1995, C. Sperber — 29♂ 13♀ ( CEMT) ; Ituberá , (39°12,10167'W; 13°49,14833'S), 11.XII.2008, Campos, E.M. & P. P. Lopez— 1♂ ( CEMT) ; same data but vila 5, (38°12,27333'W; 13°48,52833'S), XII.2008, E. M. Campus & P. P. Lopes — 1♂ ( CEMT) . Porto Seguro , VII.1993, E. Grossi - 4♂ ( CEMT) ; Reserva Ecológica Pau Brasil, [-39,233766; - 16,512466], I.1990, E. &P. Grossi — 3♂ 2♀ ( CEMT) ; same data but RPPN Veracel , (39°10'20.4"W; 16°22'46.4"S), XI.2004, J.N.C. Louzada — 48♂ 65♀ ( CEMT) ; same data but V.2012, (39°08'58.1"W; 16°22'25.8"S) — 2♂ 2♀ ( CEMT) ; same data but II.2006, F. Z. Vaz-de-Mello — 1♂ 1♀ ( CEMT) ; same data but V.2012, Audino et al.— 1♂ 2♀ ( CEMT) ; same data but (16°22'25.8"S, 39°08'58.1"W) — 3♂ 4♀ ( CEMT) ; same data but (16°21'11.2"S, 39°08'09.7"W)— 2♂ ( CEMT) ; Santa Terezinha, Serra da Jibóia , IV. 2009, A. F Brito — 13♂ 5♀ ( CEMT) ; same data but IV.2009, A. F. Brito; E. M. Silva, E. Menezes — 5♂ 4♀ ( CEMT) ; (CEMT); Una, Rebio de Una , VIII. 2005, P. Gross— 1♂ 2♀ ( CEMT) ; W. Guimarães, Floresta, (13°41’21”S, 39°21’52”W), 146m, Pitfall, C.M.P. Leite— 1♂ ( CEMT) MINAS GERAIS: Ipatinga , [-42,611268; -19,401192], 1-15.XII.1984, E.& P. Grossi — 3♂ 2♀ ( CEMT) ; same data but XI.1991, E. Grossi — 1♀.

Diagnosis. Dichotomius iannuzziae sp. nov. is similar to D. laevicollis in having the disc of the pronotum with sparse and simple punctures, visible at high magnification ( Figs 4 d, 8d) and the lateral margin of the pronotum with a row of ocellate punctures on the anterior half (as in Fig. 4 e). However, it can be distinguished by: the posterior portion of pronotum, with a row of elliptical ocellate punctures ( Fig. 8 e); the surface of the gena, with ocellate punctures on the posterior portion ( Fig. 8 b); the length, 14–16 mm.

Description. Length: 14–16 mm. Body black and shiny, with purplish sheen ( Fig. 8 a). Head: clypeal surface with transversal ridges, absent on central portion ( Fig. 8 b). Clypeofrontal suture with a central and conical horn; and two weak knobs on the interocular portion of the head, close to the eye ( Fig. 8 b). Interocular surface slightly depressed on its central portion, with dense ocellate punctures separated from each other by less than their diameter ( Fig. 8 b). Pronotum: slightly convex in lateral view.Disc smooth ( Fig. 8 d), with band of ocellate punctures near to anterior margin of pronotum. Posterior margin with row of elliptical punctures ( Fig. 8 e). Margination of posterior edge with small and sparse ocellate punctures close to posterior fovea. Hypomera: posterolateral portion with setigerous and elongated punctures; punctures touching. Metasternum: disc with sparse punctures; slightly rugose-punctate; punctures larger and forming a row close to inner margin of mesocoxae. Lateral portions with ocellate and setigerous punctures separated from each other by approximately their diameter. Elytra: surface of interstriae slightly convex; punctures noticeable only at high magnification. Elytral striae punctate and deeply impressed. Legs: ventral surface of profemur with sparse and setigerous punctures on apical quarter. Anterior and posterior margins of profemur not sulcated. Posterior margin of meso and metafemur with longitudinal sulcus along its length; sulcus approximately one-ninth as wide as the femur; surface of sulcus with well-defined microsculpture (as in Fig. 11 d). Row of setae toward the body on ventral surface of mesotibia extending the entire length of the tibia (as in Fig. 11 e). Abdomen: surface of sternites with a single row of ocellate punctures; lateral portion densely punctate on anterior half. Male medial portion of sixth sternite half as long as the fifth. Pygidium: slightly wider than long. Disc smooth, ocellate punctures only near the margins. Aedeagus: parameres subtriangular, 2/3 as long as phallobase ( Fig. 8 f–h). [lateral view] — parameres narrowed toward apex ( Fig. 8 f). Dorsal margin of parameres slightly curved outward on apical third ( Fig. 8 f). Ventral margin of parameres curved inward on apical two-thirds; on basal third almost straight ( Fig. 8 f). [ventral view] — inner margins of parameres strongly curved outward ( Fig. 8 g). [dorsal view] — basal portion of parameres slightly wider than apical portion ( Fig. 8 h). External margin of parameres strongly expanded toward apex ( Fig. 8 h). Inner margin with convergent projections on apical third ( Fig. 8 h). Dorsal surface of parameres, near apex, with microtubercles noticeable only at high magnification. Endophallus: lamella copulatrix — Projection circular; superior portion curved outward; lateral portion rounded ( Fig. 10 g). Secondary sexual characters: females differ from males by more acute clypeal teeth ( Fig. 8 c); surface of clypeus with well-defined transversal ridges ( Fig. 8 c); genal surface lacking ocellate punctures. Medial portion of sixth sternite as long as the fifth.

Figures

FIGURE 4. Dichotomius laevicollis (Felsche, 1901). a— body, dorsal view (fovea on posterolateral portion of pronotum, arrows); b— head, male; c— head, female; d— pronotum (rounded ocellate punctures closer to posterior margin, arrow); epronotum detail (lateral margin, arrow). Aedeagus. f— lateral view; g— ventral view; h— dorsal view.

FIGURE 8. Dichotomius iannuzziae sp. nov. a— body, dorsal view; b— head, male; c— head, female; d— pronotum; eposterior margin of pronotum. Aedeagus. f— lateral view; g— ventral view; h— dorsal view.

FIGURE 10. Lamella copulatrix. a— Dichotomius sericeus (Harold, 1867); b— D. irinus (Harold, 1867); c— D. laevicollis (Felsche, 1901); d— D. schiffleri Vaz-de-Mello, Gavino & Louzada, 2001; e— Dichotomius guaribensis sp. nov.; f— Dichotomius gilletti sp. nov.; g— Dichotomius iannuzziae sp. nov.; h— Dichotomius catimbau sp. nov. Scale bar 0,5 mm.

FIGURE 11. External morphology of D. sericeus species group. a— Dichotomius sericeus (Harold, 1867), body, lateral view; b— D. schiffleri Vaz-de-Mello, Gavino & Louzada, 2001, body, lateral view; c— D. sericeus, detail of posterior margin of meso and metafemur, arrows; d— D. schiffleri, detail of posterior margin of meso and metafemur, arrows; e— D. sericeus, mesotibia, ventral view (row of setae toward the body, red arrow); f— D. irinus, mesotibia, ventral view (row of setae toward the body, red arrow); g— D. irinus, pygidium; h— D. sericeus, pygidium.