Cicatrisphaerion rileyi Lingafelter, Morris, Skillman, and Santos-Silva, 2021

Lingafelter, Steven W., Morris Ii, Roy F., Skillman Jr, Frederick W. & Santos-Silva, Antonio, 2021, A new genus Cicatrisphaerion, new species, new records, and redescriptions of Neotropical Cerambycidae (Coleoptera), Insecta Mundi 2021 (865), pp. 1-20 : 6-8

Cicatrisphaerion rileyi Lingafelter, Morris, Skillman, and Santos-Silva , new species

( Fig. 11–16 )

Description. Holotype female. Head capsule reddish brown, lighter on frons, clypeus, labrum and ventral mouthparts except yellowish brown palpi; antennae orangish brown (more light reddish brown depending on light intensity); mandibles mostly reddish brown, dark brown on dorsal and ventral margins of outer side and anterior third. Prothorax mostly dark reddish brown, darker in narrow area close to procoxae and anterior half of prosternal process. Mesanepisternum, mesepimeron and anterior area of mesoventrite dark reddish brown; posterior area of mesoventrite and mesoventral process orangish brown, except narrow area close to mesocoxae and margins of mesoventral process darker. Ventral surface of metathorax dark reddish brown, except anterocentral area of metaventrite orangish brown and narrow margin close to mesocoxae and sides of metaventral process darker. Scutellum orangish brown, with margins reddish brown. Elytra orangish brown with punctures reddish brown. Legs orangish brown (more reddish brown depending on light intensity). Abdominal ventrites reddish brown, with irregular areas slightly more orangish brown.

Head. Frons coarsely, somewhat rugose-punctate, except smooth central area close to postclypeus; glabrous. Vertex and area behind upper eye lobes coarsely, shallowly, confluently punctate (punctures slightly finer and deeper behind upper eye lobes); with short, decumbent, sparse yellowish white setae, almost absent in posteromedial area of vertex, and a few long, erect, yellowish setae near eyes. Area behind lower eye lobes confluently coarsely punctate; almost glabrous, with long, erect yellowish brown setae ventrally. Genae minutely, sparsely punctate; with a few short, decumbent yellowish setae. Wide central area of postclypeus almost smooth close to frons, finely, confluently punctate close to anteclypeus, with one long, erect yellowish brown seta on each side; sides smooth, glabrous. Labrum coplanar with anteclypeus, finely, sparsely punctate, glabrous in posterior third, inclined, with long, somewhat abundant yellowish brown setae in inclined area (setae longer laterally). Mandibles coarsely rugose-punctate and with long, erect, sparse yellowish brown setae ion basal 2/3 of outer side. Gulamentum smooth, glabrous posteriorly; area between eyes coarsely, transversely rugose, with sparse, decumbent yellowish setae, and long, erect yellowish setae interspersed (erect setae sparser centrally). Distance between upper eye lobes 0.47 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.56 times distance between outer margins of eyes; upper eye lobes with three rows of ommatidia. Antennae 1.4 times elytral length, almost reaching elytral apex. Scape with sparse yellowish pubescence, and long, erect setae of same color interspersed (ventrally, erect setae present in posterior third). Pedicel and antennomeres with yellowish white pubescence not obscuring integument, denser from VI; ventral surface of pedicel and antennomeres III–X with long, erect yellowish setae (setae gradually shorter, sparser toward X); dorsal apex of antennomeres III–X with long, erect yellowish setae; spine of antennomere III about as long as length of antennomere; spine of antennomere IV with same shape of that in III, 0.75 times length of antennomere; spine of antennomere V 0.2 times length of antennomere; spine of antennomere VI 0.14 times length of antennomere; antennomere VII with spicule at apex. Antennal formula based on antennomere III (excluding apical spine): scape = 1.03; pedicel = 0.24; IV = 0.97; V = 1.21; VI = 1.09; VII = 1.03; VIII = 1.03; IX = 1.03; X = 0.91; XI = 1.09.

Thorax. Prothorax longer than wide; sides slightly rounded between anterior and posterior constrictions. Pronotum with shallow, somewhat alveolate punctation, with distinctly smooth central area; with minute, sparse yellowish white setae, absent in smooth central area, distinctly denser on sides of posterior region; with a few long, erect yellowish brown setae, absent in smooth central area. Sides of prothorax with sculpturing as on sides of pronotum superiorly, with alveoli less distinct (absent in some areas), minutely, densely rugose-punctate toward prosternum; with long, erect, sparse yellowish brown setae. Prosternum slightly rugose, minutely, densely punctate in posterior third; somewhat transversely striate in anterior third; with abundant yellowish white pubescence not obscuring integument in posterior 2/3, with pubescence distinctly sparser in anterior third. Prosternal process 0.09 times procoxal width; sides elevated; with sparse yellowish white pubescence in anterior half, glabrous on remaining surface. Ventral surface of mesothorax with abundant yellowish white pubescence not obscuring integument, except sparse pubescence in posterocentral area of metaventrite and glabrous central area of mesoventral process; narrowest area of mesoventral process 0.41 times mesocoxal width. Metanepisternum and sides of metaventrite with abundant yellowish white pubescence not obscuring integument (inner margin of this area distinctly concave on metaventrite); remaining surface of metaventrite with a few short, decumbent yellowish setae, and long, erect yellowish brown setae interspersed, except glabrous area close to metathoracic discrimen. Scutellum almost glabrous centrally, with grayish white pubescence not obscuring integument laterally (especially posteriorly). Elytra. Coarsely, densely punctate in anterior 2/3, punctures finer in posterior third, evanescent close to apex; erect setae yellowish brown. Legs. Femora somewhat coarsely, sparsely punctate on club; with short, decumbent, very sparse yellowish setae, and long, erect yellowish setae interspersed. Tibiae with short, decumbent, very sparse yellowish setae, except posterior area of ventral surface with abundant, bristly yellowish pubescence; with long, erect, moderately abundant yellowish setae.

Abdomen. Ventrites very finely and sparsely punctate; with sparse short and long yellowish setae. Apex of ventrite V rounded.

Dimensions (mm). Total length 7.95; prothoracic length 1.60; anterior prothoracic width 1.05; posterior prothoracic width 1.05; maximum prothoracic width 1.40; humeral width 1.70; elytral length 5.25.

Type material. Holotype female from MEXICO, CHIAPAS: Highway 199, 10 km S Palenque - San Manuel road, 30.V.1987, D.A Rider and E.G. Riley leg. ( FSCA, formerly ACMT).

Etymology. This species is dedicated to Edward G. Riley for his contributions to Coleoptera and for collecting the holotype.

Remarks. The differences between Cicatrisphaerion rileyi new species and C. wappesi new species may suggest they belong to different genera (shape and length of the spine on antennomere IV, prothoracic shape, pronotal sculpturing, width of prosternal process between procoxae). However, due to the presence of a cicatrix at the apex of the scape in both species and the pronounced apicomesal tibial spurs, we prefer to keep them in the same genus, at least provisionally.

Figures

Figures 11–16. Cicatrisphaerion rileyi new species, holotype female. 11) Dorsal habitus. 12) Ventral habitus. 13) Lateral habitus. 14) Femora. 15) Head, frontal view. 16) Scape.