Tyrinthia napoensis, Galileo & Mcclarin & Santos-Silva, 2017

Galileo, Maria Helena M., Mcclarin, Jim & Santos-Silva, Antonio, 2017, The genus Tyrinthia Bates, 1866 in Ecuador (Coleoptera, Cerambycidae, Lamiinae, Hemilophini), Zootaxa 4362 (3) : -

Tyrinthia napoensis sp. nov.

( Figs 11–19 )

Description. Male ( Figs 11–15 ). Integument mostly black; mouthparts reddish except palpi black; mandibles reddish-brown on basal 3/4 of dorsal and outer sides, black at distal 1/4; ventral side of mandible mostly dark brown; anteclypeus reddish-brown on base, gradually dark brown toward apex; antennomere III with yellowishorange basal ring; antennomere IV pale yellow with black distal ring; antennomeres V–IX dark brown, almost black (missing antennomeres X–XI on left antenna, IX–XI on right antenna); elytra black on basal 2/3, with apex of this area triangularly projected toward distal fifth dorsally (not reaching apex), and light area of distal third projected upward along suture (not reaching middle);procoxae dark brown, lighter on apex; mesocoxae dark reddish-brown; trochanters yellowish-brown; profemora yellowish-brown on basal half, black on distal half; meso- and metafemora yellowish-brown on basal third, black on distal 2/3.

Head. Frons convex, with conical tubercle on each side of median groove between lower eye lobes; finely, shallowly, sparsely punctate; with yellowish-white pubescence not obscuring integument (silvery or indistinct depending on angle of light source). Area between conical tubercles and upper eye lobes depressed; somewhat rugose-punctate from dorsal side of conical tubercles to base of antennal tubercles, finely, nearly smooth between antennal tubercles, finely, moderately abundantly punctate toward prothoracic margin; pubescence as on frons, denser, slightly longer and more conspicuous between upper eye lobes and prothoracic margin, but not obscuring integument, interspersed with a few long, erect yellowish setae close to eyes. Median groove distinct from clypeus to prothoracic margin. Antennal tubercles minutely, densely punctate; pubescence as on frons. Area behind upper eye lobes nearly impunctate; with yellowish-brown pubescence, dense but not obscuring integument. Area behind lower eye lobes finely, sparsely punctate; with yellowish-brown pubescence not obscuring integument (distinctly less dense than behind upper eye lobe). Genae with pubescence as on frons except glabrous distal area. Labrum coplanar with anteclypeus on basal half, strongly inclined on distal half; finely, shallowly, sparsely punctate on basal half, slightly coarser, deeper, denser on distal half; with long, erect yellowish setae on distal half. Distance between upper eye lobes 0.35 times length of scape; in frontal view, distance between lower eye lobes 0.77 times length of scape. Antennae (from base of scape to apex of antennomere IX) 1.83 times elytral length, reaching elytral apex at basal third of antennomere VI. Scape distinctly clavate, curved basally; with long, erect, moderately sparse brownish setae ventrally. Antennomere III not widened, with long, erect, moderately abundant brownish setae ventrally; antennomere IV with long, erect, moderately sparse yellowish setae ventrally (brownish on distal dark area); remaining antennomeres with long, erect, sparse brownish setae ventrally, gradually shorter, sparser toward IX. Antennal formula (ratio) based on length of antennomere III: scape = 0.45; pedicel = 0.10; IV = 0.64; V = 0.39; VI = 0.31; VII = 0.29; VIII = 0.28; IX = 0.26.

Thorax. Prothorax 1.3 times wider than long; sides rounded and widened near middle. Pronotum with three gibbosities, one centrally, more distinct, subtriangular, placed between basal quarter and at about middle, one subcircular, less distinct, placed on each side of middle; moderately finely, sparsely punctate centrally (denser basally), except smooth central gibbosity, sparser laterally; with longitudinal, moderately wide white pubescent band on each side; remaining surface with yellowish-brown pubescence not obscuring integument (indistinct depending on angle of light source). Sides of prothorax moderately finely and abundantly punctate; with yellowishbrown pubescence not obscuring integument. Ventral side of meso- and metathorax with yellowish-white pubescence not obscuring integument (silvery depending on angle of light source); prosternal process narrow between coxae; margins distinctly elevate. Mesoventral process narrow, concave, about as wide as 1/5 of mesocoxae. Mesanepisternum, mesepimeron and metanepisternum finely, shallowly, sparsely punctate. Metaventrite moderately coarsely and abundantly punctate laterally. Scutellum with yellowish-white pubescence not obscuring integument (silvery or indistinct depending on angle of light source). Elytra. Moderately coarsely, abundantly punctate, finer, sparser on light area; longitudinally striate dorsally; humeral carina moderately distinct from humerus to at about middle; with yellowish-white pubescence not obscuring integument on black area (silvery or indistinct depending on angle of light source), yellowish-orange, denser, longer, nearly obscuring integument on light area; with long, erect, sparse brownish setae on black area, yellowish on light area; apex subrounded. Legs. Procoxae distinctly conical. Femora with yellowish-white pubescence not obscuring integument (silvery or indistinct depending on angle of light source).

Abdomen. Ventrites with yellowish-white pubescence not obscuring integument (silvery depending on angle of light source); apex of ventrite V slightly concave.

Female ( Figs 16–19 ). Conical tubercles of head small, but distinct; antennae 1.45 times elytral length, reaching elytral apex at apex of antennomere IX; antennomere III somewhat widened, with long, erect, dense black setae throughout, except basally with yellowish pubescence; apex of abdominal ventrite V emarginate.

Variation. Prosternum dark reddish-brown; anteclypeus entirely reddish-brown; antennomere IV yellowishorange with black distal ring; elytra with dark brown spot close to apex; pro- and mesocoxae entirely dark brown or black; trochanters from yellowish-brown to almost black; femora entirely black; area between conical tubercles of head and base of antennal tubercles finely or slightly coarsely, moderately sparsely punctate (not rugose); labrum finely, moderately abundantly punctate on distal half of coplanar area; conical tubercles of head in female only indicated; antennae in female 1.55 times elytral length, reaching elytral apex at base of antennomere IX.

Dimensions (mm), male/female. Total length, 9.13/10.35–11.61; prothoracic length, 1.48/1.39–1.50; basal prothoracic width, 1.80/2.00–2.45; distal prothoracic width, 1.62/1.71–2.07; central prothoracic width, 1.93/2.02– 2.38; humeral width, 2.56/2.92–3.42; elytral length, 6.84/7.80–9.00.

Type material. Holotype male from ECUADOR, Napo: Cosanga (in Clibadium sp. ( Asteraceae )), 22.X.2015, J. McClarin col. (QCAZ). Paratypes—ECUADOR, Napo: Cosanga, 1 female, 14.X.2015, J. McClarin col. (QCAZ); (in fern), 1 female, 29.IX.2015, J. McClarin col. (QCAZ); (in Clibadium sp. ( Asteraceae )), 1 female, 22.X.2015, J. McClarin col. (QCZA); 1 female, 15.IX.2016, J. McClarin col. (MZSP).

Etymology. The specific epithet “ napoensis ” refers to the Ecuadorian province where the types were collected.

Remarks. Tyrinthia napoensis sp. nov. is notably similar to T. frontalis in the general appearance, shape of scape, sculpture, etc. This led us to consider the possibility of them being a single species, especially because all specimens studied were collected at the same area and most from the same plant species, the two at times in close proximity to each other on the same plant. However, as the couple specimens of T. frontalis examined and the holotype are extremely similar in the distribution of the color in the head, thorax, elytra and tibiae, and all specimens of the new species are identical between them in the color of these same parts, we concluded that they are different species. If they were of the same species, it would be expected some kind of intermediate color between the two forms. The only variation that we find in the new species is the femoral color: entirely black, or with basal area yellowish-orange.

The main differences are: head entirely black dorsally (black only on apex of antennal tubercles and spot behind upper eye lobes in T. frontalis ); prothorax entirely black (pronotum bicolorous, sides of prothorax bicolorous, prosternum yellowish-orange in T. frontalis ); ventral side of thorax entirely black (with large yellowish-orange area involving mesoventrite and centro-basal area of metaventrite in T. frontalis ); elytra entirely black on basal 2/3, with triangular projection dorsally toward distal fifth (elytra with longitudinal band from base to apex in T. frontalis ); pro- and mesocoxae dark or nearly entirely so (pro- and mesocoxae yellowish-orange in T. frontalis ); femora entirely black or with basal area yellowish-orange (femora entirely yellowish-orange in T. frontalis ); tibiae entirely black (tibia bicolorous in T. frontalis ); abdomen entirely dark (abdomen bicolorous in T. frontalis ).

Figures

FIGURES 11–19. Tyrinthia napoensis sp. nov. 11–15, holotype male: 11, dorsal habitus; 12, ventral habitus; 13, lateral habitus; 14, head, frontal view; 15, frontal tubercles and scape.16–19, paratype female:16, dorsal habitus; 17, ventral habitus; 18, lateral habitus; 19, head, frontal view.