Confluentia nigra, Santos-Silva & Galileo & Mcclarin, 2018

Santos-Silva, Antonio, Galileo, Maria Helena M. & Mcclarin, Jim, 2018, Division of the genera Sparna Thomson, 1864 and Carterica Pascoe, 1858 (Coleoptera, Cerambycidae, Lamiinae, Colobotheini) with description of six new genera and eight new species, Zootaxa 4407 (1), pp. 1-28 : 22-23

Confluentia nigra sp. nov.

( Figs 58–61 )

Description. Female. Integument mostly black; mouthparts brown with yellowish brown areas; ventral surface of head dark reddish brown; antennomere IV pale yellow at about basal 3/4, dark brown on distal area; antennomeres V–VI dark reddish brown at about basal 3/4, darkened at distal area; remaining antennomeres gradually dark brown; pronotum along distal margin slightly lighter; apex of prothoracic and elytral spines yellowish brown; prosternum slight reddish centrally; procoxae dark reddish brown; basal quarter of profemora yellowish brown, gradually darker toward club; base of mesofemora dark reddish brown; base of metafemora slightly reddish.

Head. Frons microsculptured; with short yellowish white pubescence, not obscuring integument. Vertex with yellowish brown pubescence, denser, slightly longer than on frons, not obscuring integument, except central narrow glabrous area between antennal tubercles. Area behind eyes finely, sparsely punctate behind upper eye lobes; with short yellowish brown pubescence throughout, not obscuring integument. Genae with short, sparse yellowish white pubescence not obscuring integument, distinctly sparser toward ventral side and glabrous apex. Antennal tubercles with sculpture and pubescence as on frons. Distance between upper eye lobes 0.13 times length of scape; in frontal view, distance between lower eye lobes 0.26 times length of scape. Antennae 2.1 times elytral length, reaching elytral apex at apex of antennomere VI; scape with moderately long, erect dark setae ventrally, gradually denser toward apex; antennomere III slightly tumid; antennomere IV tumid on basal half, distinctly narrowed toward apex; antennomeres III–VII with sparse, moderately short, erect dark setae ventrally (shorter and sparser toward VII); antennal formula (ratio) based on length of antennomere III: scape = 2.00; pedicel = 0.13; IV = 1.08; V = 0.87; VI = 0.87; VII = 0.83; VIII = 0.80; IX = 0.78; X = 0.64; XI = 0.61.

Thorax. Prothorax 1.48 times wider than long; widest area ending in distinct spine obliquely projected backward. Pronotum transversely sulcate near base, with 3 longitudinal gibbosities, one centrally, elliptical, from near base to slightly after middle, one on each side, curved, from near base to apex; coarsely, moderately abundantly punctate on basal quarter, finer, distinctly sparsely punctate on remaining surface; with yellowish brown pubescence not obscuring integument. Sides of prothorax with yellowish brown pubescence not obscuring integument. Ventral surface of thorax with yellowish brown pubescence not obscuring integument. Narrowest area of prosternal process 1/6 width of procoxal cavity. Mesoventral process gradually narrowed toward apex; distal area 1/5 of width of mesocoxal cavity. Scutellum with brown pubescence, not obscuring integument. Elytra. Coarsely, abundantly punctate except smooth dorsal area close to apex; humeral and dorsal carinae strongly marked; apex strongly notched close to outer spine, sutural angle rounded; with yellowish brown pubescence, denser, more distinct between epipleura and outermost dorsal carina; with a few long, erect, dark setae on distal quarter. Legs. Femora with yellowish brown pubescence not obscuring integument. Protibiae, in lateral view, with distal third widened.

Abdomen. Ventrites with yellowish white pubescence not obscuring integument (more grayish white depending on angle of light source).

Dimensions (mm), holotype female. Total length, 8.20; prothoracic length, 1.15; basal prothoracic width, 1.25; distal prothoracic width, 1.30; greatest prothoracic width, 1.70; humeral width, 1.80; elytral length, 6.00.

Type material. Holotype female from COLOMBIA, Caldas: Manzanares , 18.VII.1944, L. Richter col. ( MZSP).

Etymology. Latin, nigra = black; allusive to the general color of the species.

Remarks. Confluentia nigra s sp. nov. is similar to C. colombiana , but differs as follows: elytra entirely dark; elytral apex narrower and strongly notched close to outer spine ( Fig. 58 ). In C. colombiana ( Fig. 51 ), the elytra is bicolorous, elytral apex is wider and not strongly notched close to outer spine.

Figures

FIGURES 51–61. 51–52, Sparna colombiana, dorsal habitus, holotype female; 51, dorsal habitus (photograph by Laura Trinogga); 52, dorsal habitus, drawing by Gilmour (1950). 53–54, Sparna pallida, holotype male; 53, dorsal habitus (photograph by Laura Trinogga); 54, dorsal habitus, drawing by Gilmour (1950). 55–57, Sparna nigrolineata, holotype (photographs by Herbert Schmid): 55, dorsal habitus; 56, ventral habitus; 57, detail elytral and abdominal apices, ventral view. 58–61, Confluentia nigra, sp. nov.; holotypefemale:58, dorsal habitus; 59, ventral habitus;60, lateral habitus; 61, head,frontal view.