Sulcogracilia mexicana, Bezark & Santos-Silva, 2022

Bezark, Larry G. & Santos-Silva, Antonio, 2022, A new genus and new species of Neotropical Cerambycinae (Coleoptera, Cerambycidae), Zootaxa 5194 (4), pp. 585-594 : 586-588

Sulcogracilia mexicana sp. nov.

( Figs 1–6 )

Description. Holotype male. Head capsule dark reddish brown dorsally and laterally, reddish brown ventrally; mentum and ligula mostly reddish brown; palpomeres yellowish brown and dark brown (segments with different color on left and right palpomeres); mandibles dark reddish brown on basal 2/3, black on apical third; antennae reddish brown basally, gradually more orangish brown toward antennomere XI. Prothorax and ventral surface of mesothorax reddish brown; ventral surface of metathorax mostly orangish brown, with irregular areas more light reddish brown. Elytra reddish brown basally, gradually becoming yellowish brown toward apex. Pro- and mesofemora reddish brown on peduncle, orangish brown on femoral club; metafemora, tibiae, and tarsi mostly orangish brown. Ventral surface of abdomen orangish brown with irregular reddish brown areas interspersed.

Head. Frons moderately finely, abundantly punctate; with short, bristly, sparse yellowish-white setae, setae slightly more abundant laterally. Antennal tubercles with sculpturing and setae as on frons, except smooth and glabrous apex. Vertex transversely depressed close to anterior margin of upper eye lobes; moderately finely and abundantly punctate, except posterocentral area with semicircular rugose-punctate area; with short, decumbent yellowish-white setae not obscuring integument, setae gradually sparser toward prothorax, where they are almost absent; with a few long, erect yellowish setae interspersed on anterior half. Area behind upper eye lobes moderately finely punctate, punctures denser than on vertex, and partially confluent; with sparse, bristly, both short and long yellowish setae close to eye, glabrous close to prothorax. Area behind lower eye lobes tumid, somewhat coarsely and abundantly punctate close to eye, punctures sparser superiorly close to prothorax, gradually finer, sparser toward ventral area close to prothorax; with long, erect, somewhat abundant yellowish setae on tumid area, glabrous on remaining surface. Genae finely, abundantly punctate, except smooth apex; setae as on tumid area behind lower eye lobes, gradually shorter and whitish toward clypeus, except glabrous apex. Gulamentum smooth, glabrous on posterior half, finely, somewhat sparsely punctate, with long, erect yellowish setae on anterior half; anterocentral area slightly depressed. Wide central area of postclypeus finely punctate, punctures finer than on frons; with short, sparse whitish setae, absent centrally, and one long, erect, thick yellowish seta on each side. Sides of postclypeus smooth, glabrous. Labrum finely, sparsely punctate; with long, erect, thick yellowish setae on sides of posterior half; with transverse, arched band with short yellow setae on posterior half, setae distinctly dense on center of band. Outer side of mandibles somewhat finely, abundantly punctate on basal 2/3, smooth on apical third; with both short and long yellowish setae on punctate area, glabrous on smooth area. Distance between upper eye lobes 0.37 times distance between outer margins of eyes; in ventral view, distance between lower eye lobes 0.57 times distance between outer margins of eyes. Antennae 2.4 times elytral length, reaching elytral apex at basal third of antennomere VII. Scape finely, abundantly punctate basally, punctures gradually sparser toward apex, except smooth dorsal apex; with sparse, decumbent yellowish setae, except glabrous smooth area, and long, erect setae of same color interspersed on posterior third of ventral surface. Pedicel with sparse, both short and long yellowish setae, long setae erect ventrally. Antennomeres III–XI with minute, bristly yellowish setae not obscuring integument, setae denser from V; antennomeres III–V with long, erect, sparse yellowish setae ventrally. Antennal formula based on length of antennomere III: scape = 0.94; pedicel = 0.19; IV = 1.08; V = 1.48; VI = 1.75; VII = 1.70; VIII = 1.67; IX = 1.48; X = 1.43; XI = 1.48.

Thorax. Pronotum finely, abundantly punctate, punctures slightly coarser laterally; with short, decumbent yellowish setae not obscuring integument, and long, decumbent, somewhat abundant setae of same color interspersed. Sides of prothorax somewhat coarsely, abundantly punctate posteriorly, obliquely striate-punctate anteriorly, this last area gradually widened toward prosternum; with short, decumbent, somewhat sparse yellowish setae, and long, erect, sparse yellowish setae interspersed, both sparser on center of striate-punctate area. Prosternum somewhat finely and sparsely punctate on posterior half, finely, abundantly punctate close to anterior margin, punctures finer than on posterior half, transversely rugose, with a few fine punctures interspersed between anterior and posterior punctate areas; with moderately short, bristly, sparse yellowish setae on posterior half, long, erect, sparse yellowish setae close to anterior margin, and a few short, decumbent yellowish setae on striate area. Sides of prosternal process smooth, glabrous, moderately elevated; central area finely punctate, punctures finer and denser toward apex; with a few short yellowish setae. Ventral surface of mesothorax somewhat coarsely and abundantly punctate, punctures slightly finer laterally; with short, decumbent, sparse yellowish setae, setae slightly more abundant laterally. Metanepisternum, sides and anterior region of metaventrite somewhat finely, abundantly punctate; remaining surface of metaventrite finely, sparsely punctate; metanepisternum with short, decumbent, abundant yellowish setae anteriorly, setae sparse on remaining surface; metaventrite with short, abundant yellowish setae close to metanepisternum, setae distinctly sparser on remaining surface; with long, erect yellowish setae interspersed on central area. Scutellum, finely sparsely punctate basally, smooth on remaining surface; with a few short, decumbent yellowishwhite setae. Elytra. Somewhat coarsely, abundantly punctate, punctures gradually, slightly finer and sparser toward apex; apex rounded, narrowed toward sutural angle; with short, decumbent, somewhat abundant yellowish setae not obscuring integument, and long, erect, abundant setae of same color interspersed. Legs. Femora with short, decumbent, sparse yellowish setae, and long, decumbent yellowish setae interspersed dorsally and laterally; with short, erect, abundant yellowish setae on basal half of ventral surface, setae shorter and sparser on posterior half of ventral surface. Tibiae with sparse, both short and long yellowish-white setae dorsally and laterally, bristly, abundant ventrally, ventral setae gradually denser toward apex. Metatarsomere I longer than II–III together.

Abdomen. Ventrites finely, sparsely punctate; with sparse, decumbent, both short and long yellowish setae. Apex of ventrite 5 rounded, more subtruncate centrally.

Dimensions in mm. Total length, 14.00; prothoracic length, 2.55; anterior prothoracic width, 1.80; posterior prothoracic width, 2.05; maximum prothoracic width, 2.30; humeral width, 2.90; elytral length, 9.55.

Type material. Holotype male from MEXICO, Nuevo Léon: La Rosita, S La Poza-Dr. Arroyo rd. , 5.VII.1984, Cicero leg. ( CASC, formerly LGBC).

Etymology. The species name mexicana refers to the country of origin of this taxon.

Remarks. Based on the other species in the genera with an overall appearance very similar to that of Sulcogracilia gen. nov., the females should be very similar to the males.

Figures

FIGURES 1–9. 1–6) Sulcogracilia mexicana sp. nov., holotype male: 1) Dorsal habitus; 2) Ventral habitus; 3) Lateral habitus; 4) Head, frontal view; 5) Head, frontal view, palpi; 6) Elytral setae. 7) Caribbomerus elongatus (Fisher, 1932), male, head, ventral view, palpi. 8–9) Caribbomerus jaliscanus Heffern, Santos-Silva & Nascimento, 2021, holotype male: 8) head, ventral view, palpi; 9) Elytral setae.