Dorcasta rifkindi, 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 : 63-66

Dorcasta rifkindi , sp. nov.

( Figs 29–32 )

Description. Integument mostly dark brown, some areas almost black; mouthparts from dark to light reddish-brown.

Head. Frons moderately finely and abundantly punctate ; pubescence mostly obscuring integument (sometimes less so), pale yellow to yellowish-white on wide central, yellow laterally close to lower eye lobes (this yellow area prolonged toward apex of gena) ; with sparse long, dark erect, setae laterally; without short, thick, slender scale-like setae. Antennal tubercles with yellowish to yellowish-brown pubescence, from nearly obscuring to not obscuring integument. Dorsal surface moderately finely and sparsely punctate; with narrow, oblique yellow pubescent band on each side, slightly widened from base of antennal tubercle to prothoracic margin; remaining surface with pale yellow pubescence partially obscuring integument; with a few long, dark erect setae. Area behind eyes moderately coarsely, sparsely punctate (sparser behind lower eye lobes); with longitudinal, moderately wide yellow pubescent band from eye to prothorax, not connected to pubescent band of dorsal surface; remaining surface with yellowish- brown pubescence partially obscuring integument (sometimes yellowish-white); with sparse long, dark erect setae. Genae with sculpturing as on area behind lower eye lobes ; with yellowish-brown (sometimes yellowish-white) pubescence partially obscuring integument, except yellow pubescent band starting on frons; with sparse long, dark erect, setae. Distance between upper eye lobes 0.23 times length of scape; in frontal view, distance between lower eye lobes 0.63 times length of scape. Antennae in male 1.6 times elytral length, reaching elytral apex at basal third of antennomere X; in female, 1.5 times elytral length, reaching elytral apex at base of antennomere XI. Scape with moderately sparse long, dark erect, setae ventrally (from shorter to slightly longer than diameter of scape). 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), abundant, especially in basal antennomeres, but not forming dense fringe. Antennal formula (ratio) based on length of antennomere III (male/female; only one couple measured): scape = 1.03/1.13; pedicel = 0.24/0.28; IV = 1.22/1.30; V = 1.03/1.10; VI = 0.89/0.89; VII = 0.77/0.78; VIII = 0.69/0.65; IX = 0.60/0.65; X = 0.53/0.61; XI = 0.57/0.65.

Thorax. Prothorax cylindrical, not, to slightly widened centrally. Pronotum coarsely, abundantly punctate; with wide, longitudinal yellow pubescent band from base to apex, on each side, and slightly narrower, longitudinal yellow pubescent band from base to apex, centrally, with narrow white pubescent band close to each side of lateral yellow pubescent bands (sometimes absent or indistinct); remaining surface with yellowish-brown pubescence partially 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 partially obscuring integument on remaining surface; with sparse long, dark erect, setae. Ventral side of thorax with yellowish-white pubescence partially obscuring integument, except laterally wide (especially on mesanepisternum and mesepimeron), longitudinal yellow pubescent band, covering mesanepisternum to apex of metaventrite and basal area of metanepisternum. Metaventrite coarsely, moderately sparsely punctate laterally. Scutellum with yellow pubescence obscuring integument. Elytra. Coarsely, abundantly punctate basally, gradually finer, sparser toward apex (punctures sub-aligned); outer angle of apex with long triangular projection, oblique toward unarmed sutural angle; with moderately abundant long, dark erect, setae throughout; pubescence as follows : three longitudinal, wide, yellow pubescent bands (two dorsal ones fused at apex), two dorsally (innermost starting at about apex of basal sixth; outermost from base to apex), another laterally from base to near apex; dorsal yellow pubescent bands distinctly separated from base to near apex (sometimes slightly separated throughout); two longitudinal white pubescent bands from base to apex, one on lateral curvature, another close to outer margin; with narrow, white pubescent band laterally close to each side; longitudinal yellow pubescent bands with narrow, yellow pubescent band along basal third of suture, gradually narrower, whiter, less distinct toward apex; remaining surface with yellowish-brown pubescence partially obscuring integument. Legs. Metafemora notably widened in male ( Fig 32 ), moderately narrow in female.

Abdomen. Ventrites moderately coarsely, sparsely punctate, slightly more abundant laterally and on ventrite V; with yellowish-white pubescence partially obscuring integument, except longitudinal yellow pubescent band from base of ventrite I to apex of IV laterally, usually connected between them along apex of ventrites ( Fig. 32 ); ventrite V in male sub-flat, slightly depressed distally in female.

Dimensions (mm), holotype male/ paratype males/ paratype females. Total length, 10.50/8.05–10.00/9.45– 12.30; prothoracic length, 2.00/1.45–1.90/1.75–2.30; basal prothoracic width, 1.75/1.20–1.55/1.45–1.95; distal prothoracic width, 1.75/1.20–1.55/1.45–1.95; greatest prothoracic width, 1.80/1.25–1.65/1.55–2.10; humeral width, 2.30/1.60–2.10/1.95–2.75; elytral length, 7.40/5.70–6.95/6.65–8.60.

Type material. Holotype male from MEXICO, Puebla: 2.7 km NW Petlalcingo (18°05’49”N / 97°56’49”W; 1500 m), 7.VII.2001, R.L . Westcott col. (CAS). Paratypes – MEXICO, Morelos : San Andrés de la Cal (1498 m), 3 males, 4.IX.2013, J . Rifkind, R. Reyes, I. Villanueva, A. Hernández, J. Martínez & G. Cordero col. (LGBC); km 19 E. Cuernavaca (Cañon de Lobos; 1220 m), 2 males, 3.XI.1990, A. Mudge col. (LGBC); Sierra de Huatla, vic. Estacion Biologia El Limon, tropical deciduous forest, (1275 m), 1 male, 6.X.2013, J . Rifkind, R. Reyes, I. Villanueva, A. Hernández, J. Martínez & G. Cordero col. ( LGBC); Jalisco : Estación Biológica Chamela (km 59 carretera Melaque-Puerto Vallarta, 1 male, 28.IX.2002, R.L. Westcott col. (LGBC); 1 female, 7.X.2002, R.L. Westcott col. (LGBC); Estación Biológica Chamela, 1 male, 20-27.VII.1984, J. T. Doyen col (EMEC); Estación Biológica Chamela, 1 male, 8-16.VII.1985, J. Chemsak, H. Katsura & A. E. Michelbacher cols (EMEC); Estación Biológica Chamela, 1 male, 13.II.1985, 1 male, 22.VIII./1985, F. A. Noguera col (EMEC); IBUNAM, Eje Central, 1 male, 1 female, 28.IX.2002, A . Mudge col. ( MZSP); Guerrero : 29 km E Chichihualco, 2 females, 16.IX.1989, J. E. Wappes col. (ACMT); Estación Biológica Chamela, 1 male, 9-10.X. 1988, R.L. Westcott & A. Mudge col. (CSCA); Estación Biológica Chamela, 1 male, 5-12.X. 1988, R.L. Penrose col. (CSCA); Estación Biológica Chamela, 1 female, 12-16VII.1992, Cope collection (CAS); 3 km SW Las Palmas, 1 male, 24.VII.1990, R.L. Penrose col. (CSCA); near Cuitzmala, 2 males, 10.X.1988, R.L. Penrose col. (CSCA); 5 km SW Tecalitlan, 1200m, 1 male, 2.I.1989, E. S. Ross & R. E. Stecker cols. ( CAS); Colima : E Road to El Terrero, 3-4000’, 4.X.1992, J. E. Wappes col ( EMEC); Guerrero : 23 km W Iguala, 1 male, 18-20.IX.1989, J. E. Wappes col (EMEC); 8-10 km E Huitzuco, 1 male, 19.IX.1989, J. E. Wappes col (EMEC); 3 km S Zumpango del Rio (1200 m), 1 female, 6.XI.1990, A. Mudge col. (LGBC); 23 km N Iguala, 1 female, 18-20.IX.1989, J. E. Wappes col. (ACMT); 40 km E Iguala, 1 female, 15.X (no year indicated), F. T. Hovore col. ( CAS) ; 12 km W Tetelcingo, 1 male, 21.IX.1989, J. E. Wappes col. (ACMT); Hwy 134 (55 km NE Villa de Zaragoza), 2 males, 1 female, 14.VII.1985, J. E. Wappes col. (ACMT); 17 km W Iguala, 3 males, 20-27.VII.1987, Jim Cope col. (CAS); 3 km W Chilpancingo, 2 males, 20- 27.VII.1987, Jim Cope col. (CAS); 3 km N Chilpancingo, 1 male, 18.XI.1946, E. C. Van Dyke col. ( CAS). Puebla : 60 mi S Puebla, 1 male, 3.VII.1955, Derham Giuliani col. ( CAS) ; Mexico: Tejupilco, 1 male, 15.VII.1952, H. E. Hinton col. ( CAS) ; Chiapas: El Aguacero, 1 female, 25.IX.1989, R.L. Penrose col. ( LGBC) ; Veracruz: 2 females, 25.X.1979, J. E. Wappes col. ( ACMT) ; PANAMA : Panama, Las Cumbres, 1 male, 4.XII.1976, H. Wolda col. ( CAS) ; La Chorrera, 1 female, 20.XII.1944, K. E. Frick, col. (CAS); Canal Zone , Fort Clayton, 1 female, 3.I.1945, K. E . Frick, col. (CAS)

Remarks. Dorcasta rifkindi sp. nov. is similar to D. crassicornis , but differs as follows: erect setae on the ventral side of antennal segments distinctly less dense ( Fig. 31 ); central yellow pubescent band on pronotum as 3/4 of the basal width of antennomere III. In D. crassicornis , the erect setae on the ventral side of antennal segments are notably dense ( Fig. 18 ), and the central yellow pubescent band on pronotum is narrower than half of the basal width of antennomere III. It differs from D. dasycera by the metafemora in males being notably tumid ( Fig. 32 ) and the erect setae on the ventral side of antennomeres more abundant and shorter ( Fig. 31 ). In D. dasycera the metafemora in males is not notably tumid ( Fig. 4 ), and the erect setae on the ventral side of the antennal segments are sparser and longer ( Fig. 1 ).

Etymology. This species is named after our colleague Jacques Rifkind of Southern California, an avid clerid worker who has provided numerous cerambycids for study including specimens in the type series.

Figures

FIGURES 26–32. 26–28, Dorcasta birai sp. nov., holotype female: 26, Ventral habitus; 27, head, frontal VieW; 28, frons. 29– 32, Dorcasta rifkindisp. nov., holotype male: 29, lateral habitus; 30, head, frontalVieW;31, dorsal habitus;32, Ventral habitus. SlENDER SCAlE-lIKE SETAE; WITH SPARSE lONG, DARK ERECT, SETAE. PROSTERNUM COARSEly, SPARSEly PUNCTATE; WITH MINUTE

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.