Callisema skillmani Wappes and Santos-Silva, 2020

Wappes, James E. & Santos-Silva, Antonio, 2020, Taxonomic contributions to Neotropical Lamiinae (Coleoptera: Cerambycidae) including a new genus, five new species and a new synonym, Insecta Mundi 2020 (769), pp. 1-21 : 9-10

Callisema skillmani Wappes and Santos-Silva , new species

( Fig. 30–34 )

Description. Male. Integument mostly dark brown, almost black; antennomeres somewhat dark reddish-brown anteriorly, gradually brown toward apex; femora dark reddish-brown, with apex darke- ned; tibiae dark reddish-brown, with base darkened; apices of abdominal ventrites I–IV reddish-brown.

Head. Frons coarsely, abundantly punctate; with white pubescent band close to eyes, with a few pale-yellow setae interspersed, and sparse pale-yellow pubescence, with white setae interspersed on remaining surface; with a few long, erect dark setae close to eyes, and short erect, sparse dark setae on remaining surface. Area between antennal tubercles and upper eye lobes with sculpturing as on frons; with yellowish-brown pubescence and white pubescence interspersed; with long, erect dark setae between antennal tubercles. Remaining surface of vertex and area behind upper eye lobes finely, sparsely punctate; pubescence as in area between upper eye lobes, except an area close to prothoracic margin glabrous. Area behind lower eye lobes coarsely rugose close to eye, nearly smooth close to prothoracic margin; with dense pale-yellow pubescent band close to eye, pubescence much sparser in remaining punctate area, glabrous close to prothorax. Antennal tubercles coarsely, abundantly punctate basally, punctures gradually finer toward apex; with white pubescence close to eyes, yellowish-brown on remaining surface, with long, erect dark setae interspersed. Genae finely, abundantly punctate in wide area close to eye, smooth on apex; with yellowish-white pubescence close to eye toward clypeus, denser, pale-yellow toward ventral surface, except glabrous smooth area; with a few long, erect dark setae close to eye. Postclypeus coarsely, sparsely punctate in wide central area, smooth laterally; with sparse white pubescence in wide central area, with long, erect dark setae interspersed, glabrous laterally. Labrum with sparse white pubescence posteriorly, with long, erect dark setae interspersed, glabrous anteriorly, with fringe of nearly golden setae on anterior margin. Distance between upper eye lobes 0.18 times length of scape (0.12 times distance between outer margins of eyes); in frontal view, distance between lower eye lobes 0.64 times length of scape (0.43 times distance between outer margins of eyes). Antennae 1.45 times elytral length, reaching elytral apex at apex of antennomere X. Scape with apical cicatrix well marked; finely, densely, confluently punctate; with yellowish-brown pubescence dorsally and in superior area of sides, white ventrally and inferior area of sides; with a few long, erect dark setae. Pedicel with white pubescence anteriorly, yellowish-brown on remaining surface. Antennomeres with white pubescence on base of dorsal surface, in about basal 2/3 of ventral surface of antennomeres III–IV, basal half of ventral surface of V–VII, basal third of ventral surface of VIII–X, and basal quarter of ventral surface of XI; remaining surface of antennomeres with yellowish-brown pubescence not obscuring integument; antennomeres III–VIII with a few long, erect dark setae ventrally. Antennal formula (ratio) based on length of antennomere III: scape = 0.93; pedicel = 0.17; IV = 0.93; V = 0.80; VI = 0.73; VII = 0.67; VIII = 0.60; IX = 0.57; X = 0.47; XI = 0.38.

Thorax. Prothorax slightly wider than long; sides with small, conical tubercle about middle. Prono- tum coarsely, abundantly punctate; with yellowish-brown pubescence not obscuring integument, with white pubescence interspersed; with long, erect, sparse dark setae interspersed. Sides of prothorax with sculpturing and pubescence as on pronotum (pubescence slightly denser close to prosternum). Prosternum slightly rugose-punctate; with yellowish-brown pubescence laterally, yellowish-white, not obscuring integument on remaining surface (yellowish-white pubescence slightly denser laterally and in narrow central area close to prosternal process). Prosternal process distinctly narrowed centrally; with yellowish-white pubescence partially obscuring integument. Ventral surface of meso- and metathorax with yellowish-brown and white pubescence mixed, denser laterally, except mesoventral process with yellowish-white pubescence. Mesoventral process vertically sloped anteriorly, with slightly distinct central tubercle close to anterior margin. Scutellum with yellowish-brown and white pubescence mixed. Elytra. Coarsely, abundantly punctate in basal third, punctures gradually finer, sparser toward apex; apex individually rounded (almost obliquely truncate); with yellowish-brown pubescence partially obscuring integument in some areas, with white pubescence interspersed; with long, erect dark setae throughout. Legs. Femora and tibiae with white and yellowish-brown pubescence mixed (posterior third of dorsal surface of mesotibiae with abundant erect brown setae), with long, erect dark setae interspersed (distinctly more abundant on tibiae). Tarsi mostly with white pubescence.

Abdomen. Ventrites finely, densely, shallowly punctate (general appearance somewhat finely rugose), except smooth apices of ventrites I–IV; sides with moderately dense white and yellowish-brown pubes- cence mixed, gradually sparser, yellowish-white toward central area, with long, erect brown setae interspersed. Posterior margin of ventrite V slightly concave centrally.

Dimensions in mm. Total length 9.40; prothoracic length 1.75; anterior prothoracic width 1.55; poste- rior prothoracic width 1.70; widest prothoracic width (between apices of lateral tubercles) 2.10; humeral width 2.60; elytral length 6.45.

Type material. Holotype male from BOLIVIA, Santa Cruz: Potrerillo del Guendá (Snake Farm, 17°40′S / 63°27′W, 370–400 m), 14–16 X.2011, Wappes and Skillman col. ( FSCA, formerly ACMT).

Etymology. Named for Fred Skillman, a good friend and one of the collectors of the holotype.

Remarks. This new species is included in Callisema Martins and Galileo, 1990 . It is also closely related to Graminea Thomson, 1864 , as both genera share having the tubercle of the mesoventral process almost indistinct. However, they differ by the new species having the anterior margin of the mesoventral process vertical ( Fig. 34 ), whereas in most Graminea the anterior margin is gradually sloping (strongly or slightly oblique). An exception in Graminea is G. annulata Galileo and Martins, 1990 , where the anterior margin of the mesoventral process is almost vertical. However, it differs from C. skillmani by the dorsal surface of the mesoventral process being somewhat concave and lacking tubercles (with slightly distinct central tubercle close to anterior margin in C. skillmani ).

Callisema skillmani new species is also similar to C. elongata Galileo and Martins, 1992 , but differs by the elytra being shorter than four times prothoracic length and by lacking irregular glabrous areas. In C. elongata (see photograph of the holotype at Bezark 2020), the elytra are about 4.2 times the prothoracic length and have irregular glabrous areas clearly visible.

Figures

Figures 30–34. Callisema skillmani, holotype male. 30) Dorsal habitus. 31) Ventral habitus. 32) Lateral habitus. 33) Head, frontal view. 34) Mesothorax, lateral view.