Amphicnaeia rileyi Wappes, Santos-Silva and Galileo, 2019

Wappes, James E., Santos-Silva, Antonio & Galileo, Maria Helena M., 2019, Synonymies, a new combination, and four new species in Amphicnaeia Bates (Coleoptera: Cerambycidae: Lamiinae), Insecta Mundi 703 (703), pp. 1-18 : 7-8

Amphicnaeia rileyi Wappes, Santos-Silva and Galileo , new species

( Fig. 22–26 )

Description. Male ( Fig. 22–25 ). Integument mostly brown, darker-brown in some areas, especially head and sides of pronotum; mouthparts mostly yellowish-brown, with apex of last palpomeres pale-yellow; antennae light-brown basally, gradually dark reddish-brown toward distal segments, except narrow yellowish-brown basal ring, more distinct ventrally; pronotum dark reddish-brown in wide central band, and transverse anterior area; some areas of ventral surface of thorax irregularly reddish-brown or dark reddish-brown; elytra with wide yellowish-brown band from humerus to apex, widened, reaching suture about apex of anterior third, then following toward apex away from suture; circum-scutellar area brownish, and remaining surface brown except apex narrowly yellowish; legs dark reddish-brown variegated with yellowish-brown; abdominal ventrites dark reddish-brown variegated with yellowishbrown and dark-brown.

Head. Frons moderately finely, abundantly punctate; with pale-yellow pubescence not obscuring integument, slightly denser close to eyes. Vertex and area behind upper eye lobes with sculpturing as on frons; with yellowish-brown pubescence obscuring integument between antennal tubercles, following as pubescent band along central area; with moderately sparse yellowish-brown pubescence close to eyes, slightly brownish, not obscuring integument on remaining surface. Area behind lower eye lobes coarsely, abundantly punctate (punctures coarser than behind upper eye lobes); with yellowish-brown pubescence nearly obscuring integument. Antennal tubercles with sculpturing as on frons basally, smooth toward apex; pubescence as on frons. Genae finely, sparsely punctate except smooth apex; with yellowishbrown pubescence obscuring integument, apex glabrous; with a few long, erect dark setae. Postclypeus with sculpturing and pubescence as on frons posteriorly in wide central area, nearly glabrous close to anteclypeus, glabrous laterally; with a few long, erect, thick dark setae in wide central area close to frons. Labrum with short, decumbent, sparse yellowish setae, with long setae of same color interspersed; distal margin with fringe of nearly golden setae. Distance between upper eye lobes 0.15 times length of scape; in frontal view, distance between lower eye lobes 0.92 times length of scape. Antennae 1.9 times elytral length, reaching elytral apex in distal fifth of antennomere VIII. Scape finely asperate, more distinctly so dorsally, near apex; with yellowish-brown pubescence not obscuring integument. Pedicel and antennomeres III–X with long, erect, thick dark setae ventrally. Antennal formula (ratio) based on length of antennomere III: scape = 1.25; pedicel = 0.32; IV = 1.55; V = 1.45; VI = 1.35; VII = 1.35; VIII = 1.22; IX = 1.15; X = 1.05; XI = 1.25.

Thorax. Prothorax slightly wider than long; uniformly rounded laterally, slightly narrowed posteriorly. Pronotum coarsely, abundantly punctate; sides and central band with dense yellowish pubescence nearly obscuring integument; remaining surface with brownish pubescence not obscuring integument; with a few long, erect, thick, dark setae close to center of posterior margin. Sides of prothorax with sculpturing as on sides of pronotum. Prosternum and prosternal process coarsely, abundantly punctate; with yellowish-white pubescence not obscuring integument, slightly denser on sides of prosternum; narrowest area of prosternal process about 0.2 times width of procoxal cavity. Ventral surface of meso- and metathorax with yellowish-white pubescence, denser laterally; narrowest area of mesoventral process about 0.3 times width of mesocoxal cavity. Scutellum with yellowish pubescence obscuring integument. Elytra. Coarsely, abundantly punctate in basal half, gradually sparser toward apex; with abundant yellowish pubescence not obscuring integument in light areas and along suture near scutellum; with yellowish-brown pubescence not obscuring integument in remaining surface; with long, erect, thick, dark setae throughout; apex slightly truncate. Legs. Femora with yellowish-white pubescence not obscuring integument. Tibiae with yellowish-white pubescence on basal half, more yellowish-brown pubescent and bristly on distal half (only ventrally in protibiae).

Abdomen. Ventrites with abundant yellowish-white pubescence not obscuring integument; distal fourth of ventrite V gradually inclined; apex of ventrite V truncate.

Female ( Fig. 26 ). Pronotum entirely dark-brown; circum-scutellar area brown; antennae mostly darkbrown; antennae 1.6 times elytral length, reaching elytral apex at middle of antennomere X; apex of abdominal ventrite V rounded.

Dimensions (mm). holotype male/ paratype female. Total length 4.30/3.45; prothoracic length 0.80/0.65; anterior prothoracic width 0.85/0.65; posterior prothoracic width 0.80/0.65; maximum prothoracic width 0.90/0.70; humeral width 1.25/1.15; elytral length 3.05/2.35.

Type material. Holotype male from COSTA RICA, Heredia: 16 km SSE La Virgen (1050–1150 m; 10°16′N / 84°05′W; primary forest; MV light), 9–14.III.2001, E. G. Riley col. ( TAMU) . Paratype female from PANAMA, Panama: Cerro Campana, 2.VI.1993, F. Andrews and A. Gilbert col. ( LGBC) .

Remarks. Amphicnaeia rileyi new species is similar to A. bivittata Melzer, 1933 (see photograph of the holotype at Bezark 2019) but differs as follows: body more robust; prothorax not parallel-sided anteriorly; pronotum with wide central pubescent band; longitudinal pubescent bands of the elytra fused in basal third. In A. bivittata , the body is slender, prothorax parallel-sided anteriorly, pronotum without wide central pubescent band, and the longitudinal pubescent bands of the elytra are not fused. It differs from A. quinquevittata Bates, 1885 (see photograph of the holotype at Bezark 2019), by the elytra with only two longitudinal pubescent bands, fused in basal third (elytra with 5 longitudinal pubescent bands, not fused in A. quinquevittata ). Amphicnaeia rileyi can be separated from A. interrupta Galileo and Martins, 2003 (see photograph of the holotype at Bezark 2019) by the pubescent bands of the dorsal surface of the elytra wide, and absence of lateral pubescent band (respectively, narrow, and present in A. interrupta ). It differs from A. lineolata Galileo and Martins, 2011 (see photograph of the holotype at Bezark 2019) by the slender antennomeres, and longitudinal pubescent bands of the elytra fused in anterior third (respectively, thicker and not fused in A. lineolata ). The new species also differs from A. piriana Martins and Galileo, 2001 (see photograph of the holotype at Bezark 2019) by the elytra without longitudinal pubescent band laterally (present in A. piriana ). Finally, the new species differs from A. flavescens Martins and Galileo, 1999 by the longitudinal pubescent band of the elytra not interrupted after midlength (interrupted in A. flavescens ).

Etymology. It is a pleasure to name this species after notable beetle collector and coleopterist, Ed Riley (TAMU) who collected the holotype.

Figures

Figures 22–28. Amphicnaeia spp. 22–26) Amphicnaeia rileyi. 22) Dorsal habitus, holotype male. 23) Ventral habitus, holotype male. 24) Lateral habitus, holotype male. 25) Head, frontal view, holotype male. 26) Dorsal habitus, paratype female. 27) Amphicnaeia affinis, holotype, dorsal habitus. 28) Amphicnaeia lineata, holotype, dorsal habitus.