Cupecuara erwini, Botero & Santos-Silva, 2020

Botero, Juan Pablo & Santos-Silva, Antonio, 2020, Review of the genus Cupecuara (Coleoptera: Disteniidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 60 (2), pp. 639-650 : 643-648

Cupecuara erwini sp. nov.

( Figs 18–37 )

Type locality. Ecuador, Napo, Reserva Ethnica Waorani, 1 km S of Onkone Gare Camp, 00°39′10″S 76°26′00″W, 220 m a.s.l.

Type material. Hඈඅඈඍඒඉൾ: J, ‘ ECUADOR: NAPO Res. Ethnica | Waorani, 1 km S. Onkone Gare | Camp, Trans.Ent., 9 Oct. 1994 | 220m 00°39’10”S 76°26’W | T.L. Erwin, et al.’ ( MZSP). Pൺඋൺඍඒඉൾඌ: 3 JJ 3 ♀♀, same data as holotype ( MZSP); J, same data as holotype, except ‘ 6.x.1995 ’ ( MZSP); 2 JJ 1 ♀, same data as holotype except ‘ 8.x.1995 ’ (J in IAVH: IAVH-E-203781, J ♀ in MZSP); 1 J, same data as holotype, except ‘ 2.x.1996 ’ ( MZSP); 1 ♀, same data as holotype except ‘ 4.x.1996 ’ ( MZSP).All specimens with the following additional information: ‘Insecticidal fogging of mostly bare green leaves, some with covering of lichenous or bryophytic plants in terre firme forest (Project MAXUS)’.

Description. Holotype male ( Figs 18–21 ). Integument mostly violaceous with greenish reflections in some areas; mouthparts mostly reddish brown, with some areas brownish, except for maxillary palpomeres III–IV and labial palpomere III that are brown with apex reddish brown; anterior area of postclypeus and anteclypeus brownish; posterior area of labrum brown, and anterior area yellowish brown; anterior area of intermaxillary process reddish brown; antennomere III dark violaceous, and remaining antennomeres black; elytra yellowish brown except for longitudinal violaceous band dorsally, from base to posterior seventh (mostly along suture), gradually widened in anterior fifth, gradually narrowed from this point to its apex, and for dark brown band with violaceous reflections laterally close to epipleural margin, from base to about middle; coxae mostly brownish, with reddish brown and yellowish brown areas; trochanters pale yellow; base of femora pale yellow, gradually becoming brown to near middle, then mostly violaceous; tibiae and tarsi dark brown, with slightly violaceous reflections. Yellowish white setae that can appear whiter depending on light intensity.

Head. Frons narrow, vertical, smooth, glabrous centrally; finely, sparsely punctate laterally, with short, decumbent yellowish-white seta emerging from each puncture. Area between antennal tubercles smooth, glabrous. Vertex and area behind upper eye lobes coarsely, abundantly punctate, punctures becoming slightly finer toward prothoracic margin; with minute yellowish-white seta emerging from nearly every puncture except for punctures close to antennal tubercles that bear short setae, and a few long, erect setae, and one long, erect seta on each side close to eyes. Area behind lower eye lobes tumid close to eye; finely, transversely striate-punctate; with a few long, erect, yellowish-white setae on tumid area, glabrous close to prothorax. Genae finely, transversely striate-punctate; with short, sparse yellowish-white setae; apex flap-shaped. Gulamentum smooth, glabrous in posterior third, finely, very sparsely punctate, with a few long, erect yellowish-white setae between anterior sulcus and posterior third, finely, sparsely punctate in anterior sulcus and base of intermaxillary process; with both, short and long, erect yellowish -white setae in posterior area of intermaxillary process. Postclypeus large, mostly subhorizontal, convex, finely, sparsely punctate (punctures nearly absent anteriorly); with both, short and long, moderately sparse yellowish-white setae directed forward. Anteclypeus distinctly separated from postclypeus. Labrum finely, somewhat abundantly punctate, central area semicircularly depressed; with both, short and long erect yellowish-brown (possibly appearing lighter depending on light intensity) setae directed forward; anterior margin with fringe of yellowish-brown setae. Maxillary palpomere IV campaniform, with its frontal area subelliptical. Upper eye lobes moderately narrowed at rounded apex. Distance between upper eye lobes 0.22 times length of scape (0.34 times distance between outer margins of eyes); in ventral view, distance between lower eye lobes 0.41 times length of scape (0.62 times distance between outer margins of eyes). Antennae 2.20 times elytral length, reaching elytral apex near middle of antennomere VII. Scape reaching middle of lateral tubercle of prothorax; finely, somewhat abundantly punctate dorsally and laterally, punctures slightly sparser near apex, sparsely punctate ventrally; with short, decumbent yellowish-white setae, distinctly sparse ventrally. Antennomeres rugose -punctate, especially from V. Antennal formula based on antennomere III: scape = 1.31; pedicel = 0.12; IV = 1.00; V = 1.00; VI = 0.97; VII = 0.87; VIII = 0.81; IX = 0.69; X = 0.62; XI = 0.81.

Thorax. Prothorax slightly wider than long (including lateral tubercles); lateral tubercles large, with narrow rounded apex; anterior and posterior margins of subequal length. Pronotum with gibbosities slightly elevated, antero- and posterolateral ones irregular; coarsely, abundantly punctate, punctures sparser on anterolateral gibbosities, absent on central gibbosity, partially confluent laterally; with a few long, erect yellowish-white setae near antero- and posterolateral angles. Sides of prothorax coarsely, confluently punctate in wide central area, nearly smooth in narrow posterior area, transversely striate anteriorly (this area gradually widened toward prosternum); glabrous. Prosternum finely striate punctate on sides of posterior half, smooth in center of posterior half, transversely striate in anterior half, more so in anterior third; with sparse, long, erect yellowish-white setae close to base of prosternal process, a few short yellowish-white setae on sides of posterior half, and a few long, erect yellowish-white setae in anterior third. Prosternal process gradually narrowed from base to near middle, narrow, parallel-sided in posterior half. Mesoventrite with short, decumbent, sparse yellowish-white setae, except glabrous sides. Mesanepisternum, mesepimeron, and metanepisternum with abundant, decumbent, both long and short yellowish setae. Metaventrite somewhat coarsely and abundantly punctate laterally, punctures gradually finer, sparser toward smooth central area; with long, decumbent yellowish-white setae, closer to metanepisternum, gradually sparser toward glabrous central area. Scutellum with a few minute yellowish setae laterally.

Elytra. Coarsely, abundantly punctate, punctures slightly, gradually finer and sparser toward apex; with a few short yellowish-brown setae in anterior half, longer, more abundant in posterior half and on sides of posterior third; apex nearly obliquely truncate, with rounded outer angle.

Legs. Femora with long, decumbent, somewhat sparse yellowish-white setae, forming sparse fringe on dorsal apex. Protibiae with sparse, decumbent yellowish-white setae, except for ventral side of posterior third that bears dense yellowish-brown setae; mesotibiae with sparse yellowish-white setae in anterior half, with dense yellowish -brown setae in posterior half; metatibiae with sparse yellowish-white setae in anterior 2/3, with somewhat dense yellowish-brown setae in posterior third. Metatarsomere I shorter than II–III together.

Abdomen. Ventrites somewhat finely, sparsely punctate, except for smooth apex of I–IV; with long, decumbent, somewhat sparse yellowish-white setae, with a few long, erect setae of same color interspersed, except for apex of ventrite V that bears yellowish-brown setae; posterior margin of ventrite V truncate, slightly concave centrally.

Terminalia. Tergite VIII ( Fig. 26 ) with distal margin curved and lined with short yellow setae, mainly medially. Sternite VIII ( Fig. 27 , broken during the dissecting process) transverse; apophysis long, about three times as long as sternite. Ventral arc ( Fig. 28 ) fork-shaped, with apophysis short; arms curved. Dorsal arc was not found in the dissected specimen. Tegmen ( Figs 32–34 ) slightly shorter than median lobe; distal region completely divided into parameres; parameres cylindrical-elongated, internal margin slightly curved, apex rounded and bearing both short and long setae; ring piece elongated, without projection. Median lobe ( Figs 35–37 ) notably curved in lateral view; dorsal lobe with apex rounded and not reaching curved apex of ventral lobe.

Female ( Figs 22–25 ). Maxillary palpomere IV subcuneiform, with oblique apex; abdominal ventrite IV distinctly narrowed toward apex, and apex of abdominal ventrite V rounded.

Dimensions (in mm). Holotype male. Total length, 8.20; prothoracic length, 1.25; anterior prothoracic width, 1.10; posterior prothoracic width, 1.15; maximum prothoracic width (between apices of lateral tubercles), 1.35; humeral width, 1.70; elytral length, 5.70. Paratypes male (n = 7) / female (n = 5). Total length, 8.14±0.51 / 9.43±0,92; prothoracic length, 1.24±0.08 / 1.46±0,11; anterior prothoracic width, 1.09±0.07 / 1.24±0,11; posterior prothoracic width, 1.19±0.12 / 1.36±0,15; maximum prothoracic width (between apices of lateral tubercles), 1.43±0.08 / 1.61±0,21; humeral width, 1.76±0.10 / 1.97±0,22; elytral length, 5.73±0.36 / 6.62±0,54.

Differential diagnosis. Cupecuara erwini sp. nov. is similar to C. turnbowi , but differs from it in the integument mostly violaceous with greenish reflections in some areas; pronotum with sparsely distributed punctures, concentrated laterally, on anterior and posterior margins, and around the central gibbosity; lateral tubercles of prothorax with rounded apex; and in elytra with longitudinal dark stripe on the suture and dark band close to epipleural margin not reaching apex. In C. turnbowi , the integument is mostly pale brown; pronotum is densely and uniformly punctate; lateral tubercles of prothorax are acute at apex; and the dark stripes on the dorsal surface of elytra and along the epipleural margin are reaching apex.

Etymology. This species is named after the late Terry Lee Erwin (1940–2020), collector of the type material of this new species, for his invaluable contribution to the study of Neotropical beetles.

Figures

Figs 18–25. Cupecuara erwini sp. nov. 18–21 – holotype male: 18 – dorsal view; 19 – ventral view; 20 – lateral view; 21 – frontal view. 22–25 – paratype female: 22 – frontal view; 23 – dorsal view; 24 – ventral view; 25 – lateral view.

Figs 26–37. Cupecuara erwini sp. nov., male. 26 – tergite VIII. 27 – sternite VIII. 28 – ventral arc. 29–31 – tegmen + median lobe: 29 – dorsal view; 30 – lateral view; 31 – ventral view. 32–34 – tegmen: 32 – dorsal view; 33 – lateral view; 34 – ventral view. 35–37 – median lobe: 35 – dorsal view; 36 – lateral view; 37 – ventral view. Scale bars = 1 mm.