Dichotomius (Luederwaldtinia) catimbau,

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: 526-528

publication ID


publication LSID


persistent identifier


treatment provided by


scientific name

Dichotomius (Luederwaldtinia) catimbau

sp. nov.

Dichotomius (Luederwaldtinia) catimbau  sp. nov.

( Figs 9View FIGURE 9 a –h, 10h, 12d)

Etymology. The species name is a toponym in apposition referring to the type locality.

Material examined. Type material, Holotype. BRAZIL: PERNAMBUCO: Buíque, Vale do Catimbau  , 24.VI.2006, C. N. Liberal — 1♂ ( CEMT)  . Paratypes [6 males and 3 females]. Same data as holotype — 4♂ 3♀ (CEMT); same but Parna Catimbau  , 778 mosl, 08.III. 2007 — 1♂ (CE-UFPE). 

Diagnosis. Dichotomius catimbau  sp. nov. is similar to D. guaribensis  sp. nov. and D. gilletti  sp. nov. in having pronotal disc with ocellate punctures ( Figs 6View FIGURE 6 d, 7d, 9d) and the disc of the pygidium smooth, with ocellate punctures only on the margins (as in Fig. 11View FIGURE 11 h). It can be distinguished from D. gilletti  sp. nov. by the punctate surface of elytral striae, lacking conspicuous longitudinal ridges. It can be distinguished from D. guaribensis  sp. nov. by the metasternum bearing ocellate punctures on its anterior lobe spaced by approximately their diameter ( Fig. 9View FIGURE 9 e); margin of lateral lobes of the metasternum, near metepisternum, with dense ocellate punctures; punctures smaller than to those on central portion of the lobe. The shape of the parameres and lamella copulatrix are also diagnostic. In lateral view, the dorsal margin of parameres is slightly curved outward on apical half ( Fig. 9View FIGURE 9 f); ventral margin of parameres almost straight on apical two-thirds; on basal third slightly curved outward ( Fig. 9View FIGURE 9 f). In dorsal view, the basal portion of parameres slightly wider than apical portion ( Fig. 9View FIGURE 9 h). Lamella copulatrix with subretangular projection; lateral portion of projection curved inward medially ( Fig. 10View FIGURE 10 h).

Description. Length: 15–16 mm. Body black with glossy bluish sheen on pronotum and elytral surfaces ( Fig. 9View FIGURE 9 a). Head: anterolateral portion of clypeal surface with oblique rows of shallow punctures ( Fig. 9View FIGURE 9 b). Posterior portion of clypeus with ocellate punctures ( Fig. 9View FIGURE 9 b). Gena with dense ocellate punctures, separated from each other by approximately their diameter. Dorsal interocular surface slightly depressed on its central portion, with dense ocellate punctures ( Fig. 9View FIGURE 9 b). Clypeofrontal suture with a central and conical horn. Pronotum: convex in lateral view. Surface of disc with ocellate punctures separated from each other by approximately twice their diameter; punctures on anterolateral portion of pronotum larger and denser. Posterior margin of pronotum with large ocellate punctures, near posterior angles. Hypomera: posterolateral portion with elliptical and setigerous punctures separated from each other by approximately their width. Metasternum: disc smooth. Elytra: interstriae slightly convex; surface densely punctate, with glossy bluish sheen (as in Fig. 5View FIGURE 5 e). Elytral striae punctate and deeply impressed. Legs: ventral surface of profemur with sparse and setigerous punctures along midline. Anterior margin of profemur with a thin longitudinal sulcus; surface of sulcus with well-defined microsculpture. Ventral surface of mesofemur with few setae near the apex. Ventral surface of metafemur glabrous. Posterior margin of meso and metafemur with a longitudinal sulcus on apical half (as in Fig. 11View FIGURE 11 c). Row of setae toward the body on ventral surface of mesotibia restricted to apical third of tibia (as in Fig. 11View FIGURE 11 f, arrow). Abdomen: surface of sternites with a single medial row of ocellate punctures; lateral portion with ocellate punctures on anterior half. Male medial portion of sixth sternite as long as half of the fifth. Pygidium: slightly wider than long. Disc smooth, ocellate punctures only near the margin (as in Fig. 11View FIGURE 11 h). Aedeagus: parameres subtriangular, 2/3 as long as the phallobase ( Fig. 9View FIGURE 9 f –h). [lateral view] — parameres narrowed toward apex ( Fig. 9View FIGURE 9 f). [ventral view] — inner margins of parameres slightly curved outward ( Fig. 9View FIGURE 9 g). [dorsal view] — external margin of parameres slightly expanded toward apex ( Fig. 9View FIGURE 9 h). Endophallus: lamella copulatrix — Projection subretangular; superior portion slightly curved outward. Secondary sexual characters: females differ from males: by more acute clypeal teeth ( Fig. 9View FIGURE 9 c); surface of clypeus with well-defined transversal ridges ( Fig. 9View FIGURE 9 c);medial portion of sixth sternite as long as the fifth.