Dorcasta parkeri, Bezark & Santos-Silva & Nascimento, 2018

Bezark, Larry G., Santos-Silva, Antonio & Nascimento, Francisco E. De L., 2018, A synopsis of the genus Dorcasta Pascoe, 1858 (Coleoptera, Cerambycidae, Lamiinae, Apomecynini), Zootaxa 4399 (1), pp. 49-68 : 55-57

Dorcasta parkeri , sp. nov.

( Figs 12–17 )

Description. Integument mostly black (sometimes partially dark reddish-brown on elytra and abdominal ventrites); femora partially dark reddish-brown or entirely dark brown; basal half of meso- and metatibiae dark reddish-brown or tibiae entirely dark brown.

Head. Frons moderately finely and abundantly punctate ; pubescence nearly obscuring integument, yellowish- white except yellow lateral area close to inferior side of lower eye lobe (this yellow area prolonged toward apex of gena; sometimes pale yellow; sometimes starting at about middle of lower eye lobes); with sparse long, dark erect, setae, without short, thick, slender scale-like setae. Antennal tubercles with yellowish-brown pubescence not obscuring integument. Dorsal surface moderately finely, densely punctate; with narrow pubescent band on each side, from base of antennal tubercle to prothoracic margin, oblique from antennal tubercle to about middle of upper eye lobe, then vertical, widened toward prothorax; central area with narrow yellowish pubescent band close to prothorax (sometimes absent) ; remaining surface with yellowish-brown pubescence not obscuring integument; with a few long, dark erect setae. Area behind lower eye lobes moderately coarsely, densely punctate; with longitudinal, moderately narrow yellow pubescent band, from eye to prothorax (sometimes not reaching eye), not connected to pubescent band of dorsal surface; remaining surface with yellowish-brown pubescence not obscuring integument (sometimes more yellow on some areas); with sparse long, dark erect, setae. Genae with sculpturing as on area behind lower eye lobes, gradually finer toward dorsal surface ; with yellowish-white pubescence not obscuring integument, except yellow pubescent band starting on frons; with sparse long, dark erect, setae. Distance between upper eye lobes 0.42 times length of scape; in frontal view, distance between lower eye lobes 0.7 times length of scape. Antennae in male 1.46 times elytral length, reaching elytral apex; in female 1.40 times elytral length, almost reaching elytral apex. Scape with long (from shorter to slightly longer than diameter of scape), sparse, dark erect, setae ventrally. Pedicel and antennomeres III– X with long (from about as long as diameter of antennal segment to almost 3 times), dark erect, setae ventrally (gradually shorter and sparser toward X), moderately abundant in basal antennomeres but, not dense . Antennal formula (ratio) based on length of antennomere III (male/female; only one couple measured): scape = 1.31/1.35; pedicel = 0.29/0.29; IV = 1.21/1.26; V = 0.92/0.97; VI = 0.79/0.87; VII = 0.73/0.71; VIII = 0.63/0.68; IX = 0.55/0.64; X = 0.52/0.58; XI = 0.63/0.71.

Thorax. Prothorax cylindrical, slightly narrowed basally, widened on basal half, slightly narrowed gradually toward distal margin (sometimes not widened on basal half). Pronotum coarsely, abundantly punctate; with wide, longitudinal yellow pubescent band from base to apex, on each side and slender, longitudinal yellow pubescent band centrally (sometimes partially absent); remaining surface with yellowish-brown pubescence not obscuring integument; with sparse long, dark erect, setae throughout. Sides of prothorax with wide, longitudinal yellow pubescent band close to ventral side , with whitish pubescence on remaining surface, not obscuring integument; with sparse long, dark erect, setae. Ventral side of thorax with whitish pubescence not obscuring integument, except lateral wide (especially on mesanepisternum and mesepimeron), longitudinal yellow pubescent band, from mesanepisternum to apex of metaventrite (also covering basal third of metanepisternum); with moderately short, sparse, dark erect setae. Metaventrite coarsely, abundantly punctate laterally. Scutellum with yellow pubescence obscuring integument. Elytra. Coarsely, abundantly punctate, sparser on distal area; apex with long, thick spine at outer angle, concave toward short sutural spine; with moderately abundant long dark erect setae throughout; pubescence as follows : three longitudinal yellow pubescent bands fused at apex, two dorsally (innermost starting at about apex of basal sixth; outermost from base to apex; both separated until near apex, but sometimes partially fused along entire length), another laterally, from humerus to apex; two longitudinal white pubescent bands from base to apex, one on lateral curvature, another close to outer margin (sometimes distinct); with narrow, yellow pubescent sutural band, from scutellum to near apex of basal seventh (sometimes absent); with moderately sparse white pubescence close to yellow bands; remaining surface with yellowish-brown pubescence not obscuring integument. Legs. Metafemora notably widened in male ( Figs 14–16 ), moderately narrow in female ( Fig. 17 ).

Abdomen. Ventrites moderately coarsely, abundantly punctate laterally; with whitish pubescence partially obscuring integument, except longitudinal yellow pubescent band laterally, from base of ventrite I to apex of IV, from slightly to distinctly connected along apex of each ventrite ( Fig. 14 ); apex of ventrite V in female slightly depressed centrally (not so in male).

Dimensions (mm), holotype / paratype males/ paratype females. Total length, 7.85/6.50–8.10/6.90–7.90; prothoracic length, 1.55/1.15–1.55/1.35–1.60; basal prothoracic width, 1.25/0.90–1.05/0.95–1.20; distal prothoracic width, 1.15/0.90–1.10/1.00–1.20; greatest prothoracic width, 1.30/0.95–1.15/1.00–1.25; humeral width, 1.50/1.15–1.40/1.20–1.50; elytral length, 5.40/4.50–5.60/4.70–5.75.

Type material. Holotype male from COSTA RICA, Guanacaste: 14 km S Cañas, 1-22.X.1991, F. D . Parker col. (CAS). Paratypes – MEXICO, Chiapas: Sumidero, 23.IX.1989, F. T. Hovore, col. ( CAS) ; EL SALVADOR, 17 mi W Acauitla, Sonsonate, 2 males, 8.VI.1977, C.W. & L.B. O’Brien & G.B. Marshall collectors ( LGBC) ; NICARAGUA, Matagalpa: 8 miles SE Ciudad Darío (1400’), 2 males, 14.VII.1974, C.W. & L.B. O’Brien & G.B. Marshall col. ( LGBC, MZSP); 7 miles N Matagalpa (4900’), 1 female, C.W. & L.B. O’Brien & G.B. Marshall col. ( LGBC) . COSTA RICA, Guanacaste: Estación Experimental Enriques Jimenez Nuñez (20 km SW Cañas), 1 male, 5-17.XI.1991, A.S . Menke col. (USNM); 14 km SE Cañas, 1 male, 21-25.X.1990, F. D. Parker col. (LGBC); 1 female, 1-10.VII.1991, F.D. Parker col. (LGBC); 23.VI-15.VII.1991, 1 female, F.D. Parker col. (MZSP); 1 male, 1- 5.X.1990 F.D. Parker col. (LGBC); 1 male, 27.X.-18.XI.1990, F.D. Parker col. (LGBC); 1 male, 1-22.X.1991, F.D. Parker col. (LGBC); 1 female, 15-18.X.1991, F.D. Parker col. (LGBC); 1 female, 10-15.X.1990, F.D. Parker col. (LGBC); 1 female, 23-30.VI.1991, F.D. Parker col. (LGBC); 1 female, 20-30.X.1989, F.D. Parker col. (LGBC).

Remarks. Dorcasta parkeri sp. nov. is similar to D. dasycera but differs by the metafemora in males being distinctly widened ( Fig. 16 ) (not widened in males of D. dasycera ( Fig. 4 ). It differs from D. crassicornis ( Fig. 18 ) by the sparse setae on the ventral surface of the antennomeres (notably visibly dense in D. crassicornis ). Dorcasta parkeri also resembles D. borealis by the metafemora in males being wider than in females but, differs by the elytra having three longitudinal yellow pubescent bands ( Fig. 13 ) (in D. borealis , the elytra have a single wide pale yellow pubescent band from base to apex ( Fig. 8 )).

Etymology. This species is named after Frank D. Parker, who collected the type and numerous other cerambycids while malaise-trapping for his beloved hymenoptera in the neotropics. The first author has been fortunate to examine many of these longhorns.

Figures

FIGURES 8–13. 8–11, Dorcasta borealis: 8, dorsal habitus, male; 9, Ventral habitus, male; 10, head, frontal VieW, male; 11, lateral habitus, male. 12–13, Dorcasta parkeri, holotype male:12, head, frontal VieW; 13, dorsal habitus.

FIGURES 14–19. 14–17, Dorcasta parkeri: 14, Ventral habitus, holotype male; 15, lateral habitus, holotype male; 16, metafemora, holotype male; 17, metafemora, paratype female. 18–19, Dorcasta crassicornis, male: 18, dorsal habitus; 19, Ventral habitus.

FIGURES 1–7. 1–5, Dorcasta dasycera: 1, dorsal habitus, female; 2, Ventral habitus, female; 3, head, frontal VieW, female; 4, meso- and metafemora, male; 5, lateral habitus, female. 6–7, Dorcasta borealis: 6, meso- and metafemora, male; 7, meso- and metafemora, female.