Nyssodrysina maculosa, Nascimento & Heffern, 2018

Nascimento, Francisco E. De L. & Heffern, Daniel, 2018, New species of Acanthocinini Blanchard, 1845 (Coleoptera, Cerambycidae) from Rondônia state, Brazil and notes on some genera, Zootaxa 4446 (2), pp. 292-300 : 296-297

Nyssodrysina maculosa sp. nov.

( Figs. 9–12 )

Holotype male. General integument reddish brown; mouthparts (except mandibles), base of elytra, and legs (except dark-brown ventral area of meso- and metafemora) yellowish; antennomeres III–VI blackened toward apex; antennomeres VII–X blackened; antennomere XI slightly yellowish toward apex.

Head with dense yellowish pubescence, not obscuring integument; with a few elongated erect setae near margin of lower eye lobes; frons wider than long; antennal tubercles gradually elevated from median groove. Lower eye lobes about 1.6 times genal length. Frontoclypeal suture and labrum with erect elongated dark-brown setae; labrum with transverse row of dark-brown erect setae, and decumbent, small yellowish setae interspersed. Mandibles triangularly depressed; with dense yellowish pubescence basally. Labial and maxillary palpomere IV fusiform. Upper eye lobes with five rows of ommatidia; distance between upper eye lobes about four times width of an upper eye lobe. Antennae about 2.5 times body length; reaching elytral apex at middle-length of antennomere VI; flagellomeres with small, blackened, thick setae, sparsely distributed at inner side; remaining areas with yellowish pubescence not obscuring integument; scape gradually widened toward apex; antennal formula (ratio) based on length of antennomere III: scape = 0.86; pedicel =0.13; IV = 0.94; V = 0.90; VI = 0.90; VII = 0.82; VIII =0.88; IX =0.98; X = 1.12; XI = 1.50.

Thorax. Prothorax 1.55 times wider than long; sides with tubercle projected posteriorly at posterior third; pronotum flattened; surface coarsely, sparsely punctate, punctures denser at posterior third; central ellipse-shaped area, and circular area on each side of anterior area with brownish pubescence; remaining areas with yellowish pubescence, denser at posterior quarter. Prosternum with moderate yellowish pubescence, not obscuring integument; prosternal process 0.25 times procoxal cavity diameter. Procoxal cavity closed behind. Meso- and metaventrite with yellowish pubescence, not obscuring integument; mesanepisternum, mesepimeron, and metanepisternum with less dense yellowish pubescence; mesoventral process about 0.3 times mesocoxal cavity diameter. Scutellum about three times wider than long, with sparse brownish pubescence. Elytra. Length about 3.5 times prothoracic length; sides slightly convergent at anterior two quarters toward apex; posterior quarter more convergent toward apex; apex transversely truncate, triangularly expanded at outer angle; humerus rounded. Anterior two-thirds coarsely punctate, punctures evenly distributed throughout, sparser at posterior fifth. Pubescence as follow: base with a band of yellowish pubescence forming extended “M” considering both elytra; whitish pubescence forming oblique band toward suture, near middle linked with irregular obliquely areas toward humeri, reaching anterior fifth; narrow longitudinal band connected to oblique bands, reaching posterior third; posterior third with irregular areas of whitish pubescence, except irregular transverse areas near apex. Legs with sparse yellowish pubescence; femora pedunculate and clavate; meso- and metafemora with claves longer than peduncles, with dark-brown pubescence ventrally; mesotibiae with crest of thick blackish setae at distal half. Metatarsomere I as long as II + III.

Abdomen with sparse yellowish pubescence; abdominal ventrite I, from intercoxal process, about 2.3 length of II; II–IV slightly decreasing in length; V about 1.5 length of IV, apex slightly notched, subdecumbent darkbrown setae at margin.

Dimensions (in mm), holotype male. Total length, 5.0; prothorax length, 1.0; greatest width of prothorax, 1.5; anterior width of prothorax, 1.2; posterior width of prothorax, 1.2; humeral width, 1.8; elytral length, 3.5.

Type material. Holotype male from BRAZIL, Rondônia: Ariquemes (62 Km SW), 6–12.X.1993, C.W. & L.O’Brien col. ( MZSP).

Etymology. The name refers to the many irregular areas of the elytra.

Remarks. Nyssodrysina maculosa sp. nov. is similar to Nyssodrysina venusta by the distance between upper eye lobes more than twice the width of an upper lobe. The new species differs especially by the pronotum without longitudinal bands with whitish pubescence, and elytral base with yellowish area forming an extended “M” when considering both elytra ( Fig. 9 ). In N. venusta , the pronotum has longitudinal bands of whitish pubescence, and the basal area of the elytra has no yellowish area. Nyssodrysina maculosa sp. nov. differs from the other congeneric species especially by the distance between the upper eye lobes about four times the width of an upper lobe, yellowish humeral area and elytral pubescence pattern (see description).

Figures

FIGURES 9–16. 9–12, Nyssodrysina maculosa sp. nov., holotype, male: 9, dorsal view; 10, ventral view; 11, lateral view; 12, frontal view. 13–16, Urgleptes curvatum sp. nov., holotype, male: 13, frontal view; 14, dorsal view; 15, ventral view; 16, lateral view.