Distenia (Distenia) marinonii, Botero & Almeida, 2019

Botero, Juan Pablo & Almeida, Lúcia M., 2019, New species and new geographical records in Disteniidae (Coleoptera, Chrysomeloidea) with revised keys to species of Novantinoe and American species of Distenia (Distenia), Zootaxa 4590 (1), pp. 40-58 : 40-58

Distenia (Distenia) marinonii sp. nov.

( Figures 9–14 )

urn:lsid:zoobank.org:act:8FD8CDCC-C006-4B53-AE6D-8E82B1036C71

Description. Male. Integument from brown to dark brown; antennae darker; legs from yellow to yellowish brown; each elytron with metallic-green or metallic-blue longitudinal band laterally, from humeri to apex of elytra.

Head. Vertex and postclypeus finely, moderately densely punctate; frons and antennal tubercles smooth. Genae short, apex truncate; upper eye lobes well-separated, distance between them 2.5 times width of one upper lobe. Maxillary palpomere IV cuneiform. Gulamentum smooth. Antennae reaching elytral apex at antennomere VI; antennomeres finely punctate (punctures shallower and sparser toward apex), with short and dense yellowish setae, interspersed with longer setae; inner face of antennomeres III–X with long, dense black setae; scape curved basally, progressively dilated to apex, shorter than antennomere III, flattened dorsoventrally at base, sparsely granulate at inner face; antennal formula (ratio) based on length of antennomere III: scape = 0.81; pedicel = 0.09; IV = 1.01; V = 1.06; VI = 0.97; VII = 0.88; VIII = 0.82; IX = 0.78; X = 0.78; XI = 0.99.

Thorax. Prothorax 1.38 times wider than long (including lateral tubercles); with anterior and posterior constriction, laterally with tubercles, acute at apex and directed upward. Pronotum with five gibbosities, two laterally at anterior third, rounded at apex, two laterally at posterior third, slightly elevated, and one median longitudinal. Pronotum with transverse striae, mainly on area between anterior and posterior gibbosities, and on posterior gibbosities, and finely and sparsely punctate on anterior gibbosities; with long and sparse whitish setae. Prosternum with transverse sulcus, glabrous; finely, transversely striate. Lateral margins of prosternal process elevated, apex truncate, width at narrowest point equal to 1/6 of procoxal cavity width. Mesoventral process emarginate at apex, which is subequal in width to mesocoxal cavity. Abdominal sternites finely striate laterally, more evident in ventrites I–II. Scutellum nearly glabrous, with some sparse setae at apex, curved at posterior margin. Elytra gradually narrowed to apex, about 5 times as long as prothorax; with coarse, deep punctation, organized into four rows, from humerus to middle of each elytron, another between sutural row and the antecedent, from humerus to anterior third; with short, erect, sparse setae, denser to apex; apex of elytra obliquely truncate. Femora subfusiform; more linear toward metafemora; inner and outer apex of meso- and metafemora with minute triangular projection.

Abdomen. Ventrites finely punctate, with short and sparse setae; ventrite I and II transversely striate (more conspicuous in ventrite I); apex of ventrite V truncate.

Female. Antennae reaching elytral apex at antennomere VII; apex of ventrite V rounded.

Variation. In some specimens the metallic-green longitudinal lateral band of elytra does not reach the apex, and in one specimen it covers most of elytra ( Fig. 13 ), with brown area of elytra reduced to sutural region; pubescence on elytra can vary from almost glabrous, with short and sparse setae, to densely pubescent with setae denser and longer.

Dimensions (mm). Holotype male. Total length, 16.0; prothoracic length, 2.3; basal prothoracic width, 2.0; distal prothoracic width, 2.1; widest prothoracic width (between apices of lateral tubercles), 2.8; humeral width, 3.1; elytral length, 11.2. Paratypes male (n=5) / female (n=2). Total length, 18.08±2.45/15.7–14.5; prothoracic length, 2.58±0.36/2.2–2.1; basal prothoracic width, 2.24±0.38/1.9–1.8; distal prothoracic width, 2.3±0.34/1.9–1.8; widest prothoracic width (between apices of lateral tubercles), 3.26±0.5/2.4–2.2; humeral width, 3.62±0.5/3.1–3.0; elytral length, 13.18±1.8/11.6–10.7.

Type material. Holotype male from BRAZIL, Bahia: Encruzilhada (Estrada Rio-Bahia Km 965, Motel da Divisa , 960 m), male, XI.1974, Seabra & Roppa col. DZUP469274 ( DZUP) . Paratypes. BRAZIL, Bahia: Encruzilhada (Estrada Rio-Bahia Km 965, Motel da Divisa , 960 m), male, XI.1974, Seabra & Roppa col. DZUP469274 ( DZUP) ; Espírito Santo: Linhares , male, XI.1965, A. Maller col. DZUP469293 ( MNRJ) ; male, XI.1969, Moure col. DZUP469292 ( DZUP) ; male, X.1972, B. Silva leg. DZUP469294 ( MZSP) ; male, XII.1973, B. Silva col. DZUP469275 ( DZUP) ; Linhares ( Parque Sooretama ), female, XI.1962, F.M. Oliveira col. DZUP469276 ( MZSP) ; male, X.1967, F.M. Oliveira col. DZUP469272 ( DZUP) ; Pedro Canário , female, I.1972, B. Silva col. DZUP469277 ( DZUP) .

Etymology. The new species is named after Renato Contin Marinoni, for his contributions to the knowledge of the cerambycid fauna.

Remarks. Distenia (Distenia) marinonii sp. nov. is similar to D. (D.) solangeae Santos-Silva & Hovore, 2007 ( Figs. 15–16 ) in having the disc of pronotum transversely striate, but differs by the maxillary palpomeres not securiform in males (securiform in males of D. (D.) solangeae ); scape subcylindrical with surface finely punctate, coarser at base (scape stout, dilated toward apex, and with surface rough in D. (D.) solangeae ); and ventrites I and II laterally striate ( Fig. 14 ) (not striate in D. (D.) solangeae , see Fig. 15 ).

Figures

FIGURES 9–16. 9–14, Distenia (D.) marinonii sp. nov., male: 9, holotype, dorsal view; 10, holotype, ventral view; 11, holotype, lateral view; 12, holotype, detail of head, frontal view; 13, paratype, dorsal view; 14, holotype, detail of ventrites I and II (arrows show the transversal striae). 15–16, Distenia (D.) solangeae, male: 15, detail of ventrites I and II; 16, dorsal view.