Adesmus alboverticis, Bezark & Santos-Silva & Botero, 2023

Bezark, Larry G., Santos-Silva, Antonio & Botero, Juan Pablo, 2023, New species of Cerambycidae and Disteniidae (Coleoptera) from the Neotropical Region, Faunitaxys 11 (1), pp. 1-13 : 6-9

Adesmus Lepeletier & Audinet-Serville, 1825

Adesmus alboverticis sp. nov.

( Fig. 19-23 )

ZooBank:http://zoobank.org/ 65DE2C1E-2F97-4F44-8C92-A7A15FBA67DF

Holotype, ♀, GUATEMALA, Suchitepequez: Finca Los Tarrales , N of Patulul, 750 m, 14.52325ºN 91.13665ºW, 23-24.VI.2017, J. Monzon leg. ( CASC, formerly LGBC).

Description of the holotype

Coloration. – Frons brown; vertex and area behind eyes dark brown; ventral surface of head reddish brown; ventral mouthparts reddish brown, except pale yellow palpomeres; postclypeus brown except blackish apex of sides; anteclypeus pale yellowish brown; area of labrum close to anteclypeus yellowish-brown with irregular brown areas interspersed, remaining surface reddish brown except blackish apex; mandibles reddish brown on basal 2/3, black on apical third; antennae orangish brown, slightly darker apically. Pronotum, superior side of prothorax, and elytra brown; inferior area of side of prothorax dark brown; ventral surface of thorax reddish brown on wide central area, except brownish or dark brown area close to coxal cavities and sides of prosternal process and mesoventral process, dark brown laterally. Coxae mostly orangish; trochanters, femora, tibiae, and tarsi pale yellow. Ventrites orangish brown, gradually lighter toward ventrite 5.

Key to species of Cymatonycha

1. Elytral margins with dense, narrow yellowish-white or whitish pubescent band in both sexes; mesoventral process withouttubercle. Mexico (Jalisco, Michoacán, Guerrero, Morelos)......... C. fasciata Chemsak & Noguera, 1993

– Elytral margins without yellowish-white or whitish pubescent band; mesoventral process tuberculate.......... 2 2 (1). Genae 1.5 times longer than lower eye lobe ( Fig. 10 ). Mexico (Chiapas)............. C. megagena sp. nov.

– Genae at most as long as lower eye lobe........................................................ 3

3 (2). Genae as long as lower eye lobe ( Fig.11 , 14 ). Mexico (Sinaloa, Jalisco, Chiapas, Morelos, Quintana Roo, Yucatán, Oaxaca,

Mexico), Guatemala, Honduras, Nicaragua, Costa Rica, Panama..................... C. castanea Bates, 1874

– Genae shorter than lower eye lobe ( Fig. 15, 17 ). Costa Rica, Colombia, Venezuela.............................................................................. C. meridionalis Martins & Galileo, 1995

14. Cymatonycha castanea Bates, 1874 , ♂, Mexico (Sinaloa), head, frontal view, specimen 2.

15- 16. Cymatonycha meridionalis Martins & Galileo, 1995 , ♂, Venezuela (Maracay). 15. Head, frontal view. 16. Dorsal habitus. 17- 18. Cymatonycha meridionalis , ♀, Costa Rica (Guanacaste). 17. Head, frontal view. 18. Dorsal habitus.

Head. – Frons coarsely, sparsely punctate; with dense white pubescence close to eyes and central superior area; with abundant white pubescence not obscuring integument close to clypeus, slightly denser on each side of median groove, fused with the dense white lateral and central pubescence; remaining surface with abundant yellowish-white pubescence not obscuring integument; with a few long, erect yellowish-brown setae laterally. Area between eyes and base of antennae with dense white pubescence. Area between antennal tubercles and central area between eyes with abundant yellowish-brown pubescence not obscuring integument, except glabrous median groove; remaining surface of vertex with dense white pubescence, except very narrow yellowish-brown pubescent band along median groove; with a few long, erect yellowish-brown setae close to eyes. Area behind upper eye lobes with dense white pubescence; area between upper and lower eye lobes with longitudinal brownish pubescent band not reaching eye. Area behind lower eye lobes with dense white pubescence. Genae with abundant white pubescence close to eye, gradually sparser toward glabrous apex. Gulamentum smooth, glabrous, except base of intermaxillary process with minute yellowish-white pubescence. Wide central area of postclypeus with abundant white pubescence not obscuring integument; with one long, erect yellowish-brown seta on each side. Sides of postclypeus glabrous. Labrum glabrous close to anteclypeus; wide central area with a few short, whitish setae and long, erect, thick yellowish-brown setae; remaining surface glabrous. Distance between upper eye lobes 0.17 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.63 times distance between outer margins of eyes. Antennae 2.45 times elytral length, reaching elytral apex at base of antennomere VI. Scape, pedicel, and antennomeres III-VIII with abundant yellowish pubescence not obscuring integument; antennomeres IX-XI with yellowish pubescence not obscuring integument and abundant, short, suberect blackish setae interspersed, except apex of XI with long yellowish setae directed backward; scape, pedicel and antennomeres III -X with long, erect setae ventrally, setae yellowish brown on scape, pedicel, and base of III, gradually darkened on posterior region of III, dark on remaining antennomeres, distinctly sparser from VIII.

Antennal formula based on length of antennomere III:

– Scape = 0.65. – Pedicel = 0.09. – IV = 0.85. – V = 0.58. – VI = 0.51. – VII = 0.47. – VIII = 0.43. – IX = 0.41. – X = 0.38. – XI = 0.42.

Thorax. – Prothorax slightly wider than long; subparallel-sided on anterior 2/3, narrowed and subparallel-sided on posterior third. Pronotum convex on anterior 2/3, slightly convex on posterior third; in side view, slightly, gradually inclined from anterior margin to middle, more distinctly inclined from this point to posterior third; finely, abundantly punctate; with dense, large white pubescent macula on each side of central area of posterior 3/4, maculae inclined sideward close to posterior margin; remaining surface with dense yellowish-brown pubescence, not so dense as white pubescence, except antero- and posterocentral regions with yellowish-white pubescence; with a few long, erect yellowish setae interspersed on posterior region of yellowish-brown pubescence. Sides of prothorax with pubescence as on sides of pronotum close to it, pubescence dense, white close to prosternum. Sides of prosternum with dense white pubescence, and remaining surface mostly glabrous, except abundant yellowish-white pubescence close to procoxal cavities. Prosternal process with sparse yellowish pubescence; narrowest area located close to base, 0.13 times procoxal width. Central area of ventral surface of mesothorax with sparse whitish pubescence, slightly denser and longer on mesoventral surface, and remaining surface with dense white pubescence; mesoventral process narrowed centrally, with narrowest area 0.37 times mesocoxal width. Sides of ventral surface of metathorax with dense white pubescence, and central area of metaventrite with abundant yellowish-white pubescence not obscuring integument. Scutellum with dense white pubescence.

Elytra. – Moderately sparsely, coarsely punctate, punctures finer and sparser toward apex; with dense yellowish-brown pubescence obscuring integument, yellowish laterally and on apex, except six dense white pubescent maculae on each elytron: one moderately small basally, between humerus and scutellum; one large on dorsal anterior half, starting on anterior ninth near humeral carina, slightly obliquely inclined toward suture, strongly narrowed on its innermost region and continuing backward close to suture; one large about middle of dorsal surface, slightly oblique, not reaching humeral carina and suture; one moderately large on dorsal posterior quarter, slightly oblique, starting close to humeral carina and reaching suture; one moderately small on lateral base, not reaching humeral carina, almost reaching epipleural margin; another slightly before middle of lateral region, almost reaching humeral carina and epipleural margin. With sparse, long, erect yellowish setae throughout. Apex slightly obliquely truncate, with outer angle rounded and sutural angle slightly projected.

Legs. – Femora with white pubescence not obscuring integument; with a few long, erect yellowish setae interspersed. Tibiae with yellowish pubescence not obscuring integument, pubescence longer, yellower on ventral posterior third, especially on protibiae; with long, erect yellowish setae interspersed, setae denser on posterior quarter of mesotibiae and posterior half of metatibiae, especially dorsally. Dorsal surface of tarsi with whitish pubescence not obscuring integument, and long, erect yellowish setae interspersed.

Abdomen. – Ventrites 1 -4 with dense white pubescence laterally, pubescence sparser, not obscuring integument centrally; ventrite five with dense white pubescent macula on sides of anterior half, and abundant whitish pubescence on remaining surface. Ventrites with a few long, erect yellowish setae interspersed, setae more abundant on posterior region of ventrite 5.

Dimensions (mm)

– Total length, 5.25;

– Prothoracic length, 1.15;

– Anterior prothoracic width, 1.15;

– Posterior prothoracic width, 1.05;

– Maximum prothoracic width, 1.20;

– Humeral width, 1.60; elytral length, 3.75.

Etymology. – The specific epithet “alboverticis ” (Latin, albo, from albus, meaning white; verticis, genitive of vertex, meaning top) refers to the beautiful white vertex of the head, which separates this species from others that appear similar.

Remarks. – Adesmus alboverticis sp. nov. is similar to A. vulcanicus Galileo & Martins, 1999 ( Fig. 24- 27 ) by the yellowish brown pubescent band on sides of the prothorax narrower ( Fig. 21 ) (wider ( Fig. 27 ) in A. vulcanicus ), distance between upper eye lobes slightly wider than one upper eye lobe ( Fig. 23 ) (almost twice as wide as one upper lobe ( Fig. 26 ) in A. vulcanicus ), and by the antennae ( Fig. 19 -21 ) distinctly longer (shorter ( Fig. 24 - 25 ) in A. vulcanicus ). It is similar to Adesmus martinsi Wappes & Santos-Silva, 2017 , but differs (females) by upper eye lobes closer to each other, slightly wider than one upper eye lobe ( Fig. 23 ), frons without dense whitish pubescence, and by the presence of a white pubescence macula on lateral of elytra, before middle, almost reaching humeral carina and epipleural margin. In A. martinsi , the distance between upper eye lobes is equal to at least twice the width of one upper lobe ( Fig. 28-29 ), the frons is covered by a dense whitish pubescence and the sides of elytra only have a basal macula. Adesmus alboverticis sp. nov. differs from A. pulchellus Galileo & Martins, 1999 by upper eye lobes closer to each other, slightly wider than one upper eye lobe ( Fig. 23 ) (distinctly wider than twice width of one upper lobe ( Fig. 30 ) in A. pulchellus ), lower eye lobes larger than genal length ( Fig. 22 ) (about as long ( Fig. 31 ) in A. pulchellus ). Finally, it differs from A. icambi Martins & Galileo, 2009 (only holotype male known) by the distance between upper eye lobes distinctly narrower (wider than twice width of one upper lobe in A. icambi – in Adesmus , usually the distance is wider in females than in males), and antennae unicolorous (bicolorous in A. icambi ).

Faunitaxys, 11 (1), 2023: 1 – 13. 9

19. Dorsal habitus. 20. Ventral habitus. 21. Lateral habitus. 22. Head, frontal view. 23. Upper eye lobes.

DISTENIIDAE Thomson, 1861

Figures

Figures 19-23. Adesmus alboverticis sp. nov., holotype ♀.

Figures 7-13. Cymatonycha spp.

Figures 14-18. Cymatonycha spp.

Figures 24-31. Adesmus spp.