Psyrassa sonorensis García and Santos-Silva, 2022

García, Kimberly & Santos-Silva, Antonio, 2022, The multiform genus Psyrassa Pascoe (Coleoptera: Cerambycidae: Elaphidiini): new species, new records, synonyms and transfers, Insecta Mundi 2022 (953), pp. 1-26 : 8-10

Psyrassa sonorensis García and Santos-Silva , new species

( Fig. 68–73 )

Description. Holotype male. Head capsule (lighter ventrally), clypeus, and prothorax dark reddish-brown, with some areas darker; mandibles reddish-brown on basal 2/3, black on apical third; labrum dark reddish-brown on anterocentral region, with some areas darkened, and yellowish-brown on margins; ventral mouthparts mostly reddish-brown, except yellowish-brown palpomeres; antennae reddish-brown, gradually lighter toward apex.Elytra dark reddish-brown on basal quarter, reddish-brown on remaining surface, except posterior quarter slightly darker. Apices of mesoventral process orangish-brown. Legs reddish-brown. Abdominal ventrites 1–3 dark brown, except base reddish-brown, apex of ventrites 1–2 reddish-brown, and apex of ventrite 3 yellowish-brown; ventrite 4 dark reddish-brown, except reddish-brown base and yellowish-brown apex; ventrite 5 reddish-brown.

Head. Frontal plate narrow, smooth, glabrous; remaining surface of frons coarsely, sparsely punctate, except rugose-punctate area between antennal tubercles and clypeus; punctures on central area with both short and long, decumbent yellowish-white seta; rugose-punctate area with short, decumbent, sparse yellowish-white setae. Area between antennal tubercles and middle of area between upper eye lobes, somewhat coarsely, sparsely punctate, except for smooth center, punctures with short, decumbent yellowish-white seta; remaining surface of vertex coarsely, abundantly punctate, punctures coarser close to prothorax, confluent laterally; part of punctures with short, decumbent yellowish-white seta, and area close to eyes with long, erect setae of same color interspersed. Antennal tubercles somewhat finely, sparsely punctate, except smooth apex; each puncture with short, decumbent yellowish-white seta. Area behind upper eye lobes coarsely, densely punctate, except smooth narrow area close to eye; some punctures with short, decumbent yellowish-white seta. Area behind lower eye lobes almost smooth close to eye, coarsely, abundantly punctate close to prothorax, punctures finer toward ventral surface; with short, sparse yellowish-white setae on punctate area, and both short and long, erect and sparse yellowishwhite setae close to lower region of eye. Genae short, with the anterior margin of lower eye lobe touching distal margin close to clypeus; finely rugose-punctate, except smooth apex, with short, decumbent, sparse yellowishwhite setae, except glabrous smooth area. Maxillary palpomere IV and labial palpomere III securiform. Median groove distinct from frontal plate to area between upper eye lobes. Wide central area of postclypeus coarsely, abundantly punctate; with sparse, decumbent yellowish-white setae, and a few long, erect yellowish-brown setae on each side. Sides of postclypeus smooth, glabrous. Apical margin of postclypeus smooth. Posterocentral area of labrum finely, abundantly punctate, and remaining surface smooth; with short, bristly white setae on punctate area, except sides with a few long, erect yellowish-brown setae, and short, suberect, abundant yellowish-brown setae on anterocentral area. Gulamentum smooth, glabrous on posterior 2/3, rugose-punctate, with long, erect, abundant yellowish setae on anterior third. Outer side of mandibles coarsely, densely punctate, except smooth apex, with decumbent, somewhat sparse yellowish-white setae and long, erect yellowish-brown setae interspersed on punctate area, glabrous on smooth area. Upper eye lobes with three rows of ommatidia; distance between upper eye lobes 0.41 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.52 times distance between outer margins of eyes. Antennae 1.5 times elytral length, reaching elytral apex at base of antennomere XI. Scape coarsely, abundantly punctate, except smooth apex (this area widened toward outer side of dorsal surface); some punctures with short, decumbent yellowish-white seta dorsally, laterally, and on basal half of ventral surface; with a few long, erect seta of same color dorsally and laterally, and long, erect seta of same color on posterior half of ventral surface. Pedicel and antennomeres III–XI with yellowish pubescence not obscuring integument; pedicel and antennomeres III–X with long, erect pale yellow setae ventrally and apex of dorsal surface, erect setae gradually shorter and sparser toward antennomere X; antennomeres III–VI with distinct longitudinal carina dorsally; inner apex of antennomere III with spine 1.5 times pedicel length, with blunt apex; inner apex of antennomere IV with spine 0.7 times pedicel length, with acute apex; inner apex of antennomere V with spine 0.4 times pedicel length, with acute apex; inner apex of antennomeres VI–VII with spicule, shorter on VII. Antennal formula (ratio) based on length of antennomere III (excluding spine): scape = 0.67; pedicel = 0.29; IV = 0.79; V = 0.91; VI = 0.94; VII = 0.97; VIII = 0.91; IX = 0.85; X = 0.76; XI = 0.88.

Thorax. Prothorax distinctly longer than wide; anterior and posterior constrictions well-marked, especially posterior one. Pronotum with four slightly distinct rounded gibbosities, one on each side of anterior and posterior thirds, another more distinct, elongated, located centrally on posterior half; coarsely, somewhat abundant punctate, except smooth central gibbosity and almost smooth on apex of posterolateral gibbosities; punctures with three types of erect yellowish setae, minute, short, or long, but a few punctures lacking seta. Sides of prothorax coarsely, abundantly punctate on wide central area, striate on posterior quarter, and striate-punctate on anterior quarter; with long, erect, abundant yellowish setae. Prosternum coarsely, slightly rugose on posterior 2/3, transversely striate-punctate close to anterior margin, and transversely striate, with a few punctures interspersed between the former two areas; posterior 2/3 with abundant grayish-white pubescence not obscuring integument, and long, erect yellowish setae interspersed; area close to anterior margin with bristly, both short and long yellowish-white setae, yellower laterally, and remaining anterior third almost glabrous. Prosternal process with grayish-white pubescence not obscuring integument, slightly yellower toward apex; narrowest area 0.23 times procoxal width. Procoxal cavities distinctly opened posteriorly ( Fig. 71 ). Mesoventrite, mesanepisternum, mesepimeron, metanepisternum, and sides of metaventrite and areas close to meso- and metacoxae with abundant grayish-white pubescence, partially obscuring integument on some areas, except glabrous area of mesanepisternum close to metaventrite; remaining surface of metaventrite with long, erect pale yellow setae, except glabrous area close to metathoracic discrimen; metaventrite coarsely, somewhat abundant punctate, except smooth area close to metathoracic discrimen. Scutellum with abundant yellowish-white pubescence.

Elytra. Coarsely, abundantly punctate on anterior third, punctures gradually finer, sparser toward apex, especially on posterior quarter; some punctures with short or minute yellowish seta, and others with long, erect yellowish seta; elytral apex slightly obliquely truncate, with outer angle rounded, and sutural angle roundly projected.

Legs. Femora coarsely rugose-punctate, especially toward apex, more transversely striate on inner lateral surface of profemora; with somewhat abundant yellowish setae, mostly short and decumbent basally, and long, erect on remaining surface; inner and outer apex of meso- and metafemora with rounded projection. Tibiae with abundant, long, erect yellow setae, sparser on basal third of protibia, and denser, bristly yellowish-brown pubescence on ventral surface of protibiae and posterior third of meso- and metatibiae. Metatarsomere I slightly shorter than II–III together.

Abdomen. Ventrites somewhat finely, abundantly punctate; sides of ventrites 1–4 with dense grayish-white pubescence, gradually narrowed from base to apex, and remaining surface with sparse grayish-white pubescence and long, erect yellowish-brown setae interspersed, except glabrous apex; ventrite 5 with abundant grayish-white pubescence not obscuring integument, and long, erect yellowish-brown setae interspersed, especially on posterior third. Apex of ventrite 5 widely emarginate centrally.

Variation. Antennomere VII without spicule in one paratype; elytral apex straightly truncate; elytral sutural apex subacute.

Dimensions in mm (holotype male/ paratypes male). Total length, 12.80/11.60–12.30; prothoracic length, 2.30/2.15–2.30; anterior prothoracic width, 1.60/1.40–1.60; posterior prothoracic width, 1.55/1.45–1.60; maximum prothoracic width, 1.85/1.65–1.80; humeral width, 2.45/2.30–2.50; elytral length, 8.65/7.95–8.35.

Type material. Holotype male from MEXICO, SONORA: San Javier , 4.VII.2008, F.W. Skillman, O’Brien and Ribardo leg. ( FSCA, formerly FWSC) . Paratypes – 3 males, same data as holotype (2, FWSC; 1, MZSP, formerly FWSC) .

Etymology. The specific epithet “ sonorensis ” comes from the state of the type locality “ Sonora ” in Mexico.

Remarks. Psyrassa sonorensis new species can be included in the alternative of couplet “17” from Toledo (2005). It differs from males of P.katsurae Chemsak and Noguera, 1995 (see photographs of the holotype on Bezark 2022) especially by the distance between lower eye lobes distinctly larger, in ventral view ( Fig. 69 ), larger than half of the distance between outer margins of the eyes (distinctly shorter than half in males of P. katsurae ); and from P. nigroaenea Bates, 1892 (see photograph on Bezark 2022; Fig. 65–67 ) it differs by the tibiae not contrasting in color with the femora (contrasting in P. nigroaenea ), basal antennomeres reddish (dark brow to black in P. nigroaenea ), and antennomere V with apical spine ( Fig. 73 ) (absent in P. nigroaenea ( Fig. 67 )).

Figures

Figures 68–73. Psyrassa sonorensis sp. nov., holotype male. 68) Dorsal habitus. 69) Ventral habitus. 70) Lateral habitus. 71) Procoxal cavities. 72) Head, frontal view. 73) Spine of the antennomeres III–V.

Figures 58–67. Psyrassa spp. 58–64) Psyrassa wappesi sp. nov., holotype male. 58) Dorsal habitus. 59) Ventral habitus. 60) Lateral habitus. 61) Spine of the antennomeres III–V.62) Head, frontal view. 63) Procoxal cavities. 64) Apex of the antennomere VI. 65–67) Psyrassa nigroaenea Bates, 1892, male from Mexico (Jalisco, Morelos): 65) Dorsal habitus. 66) Procoxal cavities. 67) Antennomeres III–V.