Ucai letiziae Santos-Silva, 2014

Santos-Silva, Antonio, 2014, A New Species of Ucai Galileo and Martins, 2009 (Coleoptera: Cerambycidae: Prioninae), The Coleopterists Bulletin 68 (2), pp. 214-216 : 214-216

Ucai letiziae Santos-Silva , new species ( Figs. 1–4 )

Description. Holotype male. Integument black, except the following orangish areas: gula, prosternum, part of hypomera, prosternal process, center of mesosternum, wide transversal band on elytra, procoxae, trochanters, basal 2/3 of profemora, part of ventral side of anterior third of mesofemora; mesocoxae brownish with apex black; metacoxae dark brown; apex of ventrites III and IV brownish. Head: Without depression between antennal tubercles and upper ocular lobes; area between antennal tubercles and clypeus shining, glabrous, impunctate; area between antennal tubercles and upper ocular lobes with band of fine, moderately abundant punctures; area between upper ocular lobes with longitudinal callosity on each side of coronal suture, moderately coarsely, sparsely punctate; area around inner side of upper ocular lobes depressed, coarsely, confluently punctate; coronal suture well-marked from clypeus to anterior edge of pronotum; vertex tumid on each side of coronal suture, moderately coarsely, sparsely punctate, laterally more conspicuous; area behind eyes moderately coarsely punctate, becoming abundant, confluent towards apex of lower ocular lobes; antennal tubercles shiny on basal half, densely, confluently punctate on distal half; clypeus coarsely, abundantly punctate, with long, sparse setae directed forward; labrum shiny, almost impunctate; limits between clypeus and labrum not distinct; center of gula moderately coarsely, sparsely punctate, laterally impunctate, with moderately long, sparse setae; submentum depressed at center of anterior region, densely, coarsely punctate, with moderately long and abundant setae; genae impunctate in front of eyes, punctate below eyes; dorsal surface of head with sparse, short setae. Mandibles coarsely, densely punctate, except at apex which is impunctate. Antennae as long as 1.2 times elytral length, reaching base of distal fourth of elytra; flabellum of antennomere III slightly surpasses middle of antennomere VI; antennal formula (without flabellum) based on antennomere III: scape = 1.10; pedicel = 0.41; IV = 0.86; V = 0.86; VI = 0.86; VII = 0.86; VIII = 0.86; IX = 0.86; X = 0.86; XI = 2.41; formula of flabella, based on flabellum of antennomere III: IV = 1.15; V = 1.29; VI = 1.26; VII = 1.26; VIII = 1.23; IX = 1.15; X = 0.92. Thorax: Pronotum with distinct gibbosity on each side of anterior half; anterior area with transverse, distinct sulcus; basal fourth elevated, centrally depressed; area behind each gibbosity with a shallow depression, densely punctate; area close to inner side of gibbosities moderately coarsely, sparsely punctate; central area almost impunctate from base to apex; lateral region between posterior angles and middle of outer side of gibbosities depressed. Prosternum partially transversely, finely striate, sparsely punctate, with short, moderately abundant setae, mainly centrally. Metasternum laterally coarsely punctate. Metepisterna coarsely, densely punctate, mainly anteriorly. Scutellum glabrous, sparsely punctate on posterior fourth, distinctly longitudinally depressed. Elytra with 4 carinae: innermost distinct from base to distal fifth, where it disappears without fusion; second innermost distinct from almost base to fifth, slightly distinctly at distal sixth, where it is rounded fused with humeral one; humeral absent on basal half; outermost distinct only at distal third, somewhat rounded fused with humeral one. Elytral surface densely, coarsely punctate, slightly finer towards apex, except near sutural angle, where it is distinctly coarser. Abdomen: Finely, sparsely punctate on ventrite I; coarsely, densely striate-punctate on ventrites II–IV; moderately coarsely, sparsely punctate on ventrite V; ventrites I–IV with long, moderately sparse setae; ventrite V centrally with moderately dense setae. Legs: Femora coarsely, densely punctate, with short, sparse setae; length of profemora 3.86 times longer than wide.

Dimensions. Total length (including mandibles) 9.9 mm; prothoracic length 1.5 mm; prothoracic width between apices of anterior angles 2.0 mm; prothoracic width between apices of posterior angles 2.6 mm; humeral width 2.9 mm; elytral length 6.8 mm.

Type Material. Holotype male from BRAZIL, Minas Gerais: Parque Estadual Rio Doce, 25. IX- 13. X.2013, L. Migliori col. (MZSP).

Diagnosis. Ucai letiziae differs from Ucai nascimentoi Galileo and Martins, 2009 by the absence of a distinct depression on the head between the antennal tubercles; by antennomere III slightly shorter than the scape (slightly longer in U. nascimentoi); by the flabellum of antennomere III surpassing the middle of antennomere VI (not reaching the apex of antennomere V in U. nascimentoi); by the wider profemora wider (4.21 times longer than largest width in U. nascimentoi). The color pattern is not considered as distinctive because many species of Anacolini show considerable variation.

Etymology. The species is named for Letizia Migliori, the collector of the holotype.

Remarks. Galileo and Martins (2009) considered the following generic features (translation): region between antennal tubercles concave; antennomere III one-third longer than scape; length of flabella increases towards apex; prothorax with developed spine near base; pronotum without distinct gibbosities; three elytral carinae: the humeral fused with the second near apex. Nearly all these features are specific and not generic. Regarding the presence of a spine near the base of the prothorax (posterior angle), it is not present in U. nascimentoi and U. letiziae. The posterior angles are obtuse in both species.

The site where the holotype was collected, Parque Estadual do Rio Doce, has an area of 35,974 hectares and covers the municipalities of Marliéria, Dionísio, and Timóteo. The northwest boundary is naturally made by the Piracicaba River and the east by the Rio Doce. The area is home to the largest Atlantic rainforest in Minas Gerais (Instituto Estadual de Florestas 2014).

Figures

Figs. 1–4. Ucai letiziae, holotype male. 1) Dorsal view; 2) Ventral view; 3) Lateral view; 4) Head, frontal view.