Hamaederus glaberrimus ( Martins, 1979 ) Botero, 2021

Botero, Antonio Santos-Silva Kimberly García Juan Pablo, 2021, A review of the history of the names Hamaticherus Dejean and Plocaederus Dejean and description of a new genus and species (Coleoptera: Cerambycidae: Cerambycinae), Insecta Mundi 2021 (887), pp. 1-32 : 16-20

Hamaederus glaberrimus ( Martins, 1979) , new combination

( Fig. 43–58 )

Brasilianus glaberrimus Martins 1979: 26 ; Fragoso 1982: 149; Monné 1993: 3 (cat.).

Brasilianus (Brasilianus) glaberrimus ; Monné and Giesbert 1994: 34 (checklist).

Plocaederus glaberrimus ; Martins and Monné 2002: 238; Monné 2005: 57 (cat.); Monné and Hovore 2006: 36 (checklist); Monné et al. 2010: 238 (distr.); Galileo et al. 2011: 10, 81 (distr.); Monné et al. 2017: 7 (holotype); Monné 2021: 74 (cat.).

Redescription. Male ( Fig. 49–56 ). Integument mostly black; ventral mouthparts mostly dark brown posteriorly, irregularly reddish-brown and yellowish-brown anteriorly; antennomere III dark brown basally, gradually brown toward the apex; antennomeres IV–XI brown. Elytra mostly brown, except for narrow black area on base of dorsal surface, widened close to humerus, black macula on inclined basal quarter, narrow black band along suture, epipleural margin, and apex. Apical area of protibiae and tarsi brown. Yellowish-white pubescence appearing to be white depending on light intensity.

Head. Frons finely, somewhat abundantly punctate; frontal plate with punctures slightly coarser and sparser than on remaining surface of frons; with yellowish-white pubescence not obscuring integument, sparser on frontal plate, especially anteriorly. Area between antennal tubercles and upper eye lobes carinate centrally, especially toward upper eye lobes; area between antennal tubercles with yellowish-white pubescence not obscuring integument, except for glabrous central carina. Remaining surface of vertex with small, elongated, smooth, glabrous depression following the central carina between upper eye lobes, somewhat finely, densely scabrous-punctate, with sparse yellowish-white pubescence on remaining surface. Area behind upper eye lobes slightly depressed, with shallow, confluent punctures close to eye, somewhat finely, densely and scabrous-punctate on remaining surface; with sparse yellowish-white pubescence close to eye, almost glabrous on remaining surface. Area behind lower eye lobes smooth, glabrous close to eye, transversely plicate-punctate, glabrous on remaining surface. Genae finely, sparsely punctate except smooth apex; with sparse yellowish-white pubescence on punctate area (slightly more abundant toward ventral surface), glabrous on smooth area. Antennal tubercles finely, abundantly punctate, with yellowish-white pubescence not obscuring integument basally, smooth and glabrous apically. Wide central area of postclypeus somewhat coarsely, abundantly, partially confluent punctate, with sparse yellowish-white pubescence, and somewhat long, erect setae of same color interspersed laterally; sides smooth, glabrous. Labrum coplanar, smooth, glabrous at posterior third, inclined, concave at anterior 2/3; inclined area with sparse yellowish-white pubescence close to coplanar area, and long yellow setae directed forward laterally; anterior margin with tuft of yellow setae centrally. Gulamentum transversely plicate-punctate (nearly smooth centrally), glabrous on posterior 2/3; area between eyes tumid, finely, abundantly punctate on each side of posterior region, nearly smooth anteriorly, and with bristly yellowish-white pubescence not obscuring integument (pubescence slightly more abundant centrally). Distance between upper eye lobes 0.04 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.39 times distance between outer margins of eyes. Antennae 1.75 times elytral length, reaching elytral apex at basal 2/5 of antennomere X. Scape somewhat coarsely and abundantly punctate, except posterior half of dorsal surface transversely plicate, with sparse punctures between them; without apical cicatrix; with sparse yellowish-white pubescence. Pedicel and antennomeres III–IX with abundant yellowish-white pubescence, especially from V. Antennomeres III–IV cylindrical, widened, lacking projection apically; antennomeres V–X serrate; antennomere XI not abruptly narrowed near apex. Antennal formula based on length of antennomere III: scape = 0.59; pedicel = 0.11; IV = 0.60; V = 0.87; VI = 0.87; VII = 0.87; VIII = 0.81; IX = 0.75; X = 0.69; XI = 0.94.

Thorax. Prothorax transverse (including lateral tubercles); lateral tubercles placed centrally. Pronotum coarsely, transversely plicate (irregular on center of posterior half); with somewhat abundant yellowish-white pubescence not obscuring integument (pubescence slightly more abundant laterally), except glabrous anterior and posterior sulci; minutely punctate between folds. Sides of prothorax with sculpturing and pubescence as on sides of pronotum, except anterior area almost smooth (this area widened toward prosternum), and posterior border and proepimeron rugose (posterior border almost glabrous). Prosternum almost smooth on posterior third, rugose from posterior third to anterior sulcus; with abundant, bristly whitish pubescence (slightly more yellowish anteriorly), except glabrous anterior sulcus. Prosternal process ( Fig. 56 ) distinctly inclined apically; with abundant whitish pubescence on anterior 3/4, sparse, shorter, brownish apically; narrowest area 0.45 times the procoxal width. Ventral surface of meso- and metathorax with abundant whitish pubescence, obscuring integument on some areas, except for glabrous central area on mesoventrite and metathoracic discrimen. Mesoventral process slightly tumid on center of basal area; apical sides tab-shaped, and posterior margin strongly emarginated centrally. Scutellum with sparse yellowish pubescence centrally, distinctly dense on margins. Elytra. Minutely, densely punctate on basal half, and finely, abundantly punctate on posterior half; with abundant yellowish-white pubescence not obscuring integument; apex with outer triangular projection somewhat long, arched outward, and sutural angle with small projection. Legs. Femora finely, abundantly punctate (profemora slightly rugose on peduncle); with abundant yellowish-white pubescence partially obscuring integument. Tibiae with abundant yellowish-white pubescence partially obscuring integument, except for posterior third of profemora with bristly yellowish-brown pubescence on inner surface and ventral surface of apical third, and apical 2/3 of ventral surface of meso- and metatibiae with bristly yellowish-brown pubescence. Metatarsomere I shorter than II–III together.

Abdomen. Ventrites with abundant whitish pubescence partially obscuring integument, except glabrous apex of I–IV; apex of ventrite V almost truncate.

Female ( Fig. 43–48 , 57–58 ). Very similar to male, often differing by the shorter antennae (1.45 times elytral length, reaching elytral apex at posterior third of antennomere XI – only one female measured).

Variation (males and females). Punctures on frons slightly coarse, not differing from those on frontal plate; transversely plicate on dorsal area of scape with abundant punctures (especially in specimens from southeastern Brazil); tubercle on mesoventral process may or may not be present and, when present, it is very variable: from a slight tumescence to a distinctly elevated tubercle; antennae in males as long as in females; elytra minutely or finely punctate throughout; outer projection of elytral apex, spiniform; outer projection of elytral apex from slightly to strongly arched outward.

Dimensions (mm) (male (12)/female (22)). Total length, 15.55–21.45/18.20–23.45; prothoracic length, 3.05–4.10/3.50–4.40; anterior prothoracic width, 2.65–3.40/2.95–3.70; posterior prothoracic width, 3.00– 4.00/3.40–4.40; maximum prothoracic width, 3.80–5.15/4.30–5.60; humeral width, 4.10–5.70/4.80–6.30; elytral length, 9.70–13.60/11.50–15.20.

Material examined. BRAZIL, Amazonas (new state record): Manaus, ZF 2, km 14, torre at 023521S / 600655W, 1 male, 13-16.IX.2004, F.F. Xavier Fo, A.R. Ururahy, F. Godoi and S. Trovisco leg. ( MZSP). Minas Gerais: Mar de Espanha, holotype female, 14.IX.1909, J.F. Zikán leg. ( MZSP). Rio de Janeiro: Corcovado , 1 female, 31.VIII.1959, Alvarenga and Seabra leg. ( MZSP) ; 1 male, 30.X.1970, Alvarenga and Seabra leg. ( MZSP) . BOLIVIA (new country record), Santa Cruz: 4 km SSE Buena Vista, Hotel Flora and Fauna , 1 male, 1 female, 17–19.X.2000, Wappes leg. ( FSCA, formerly ACMT) ; 17°20′S / 63°39′W, 300–400 m, 1 male, 23.XI.2013, Skillman and Wappes leg. ( SWLC) ; Buena Vista, Hotel Flora and Fauna , 1 male, 14–16.X.2000, Morris leg. ( RFMC) ; 1 female, 19–22.X.2004, Morris and Wappes leg. ( FSCA). Cochabamba: Vila Tunari, Hotel El Puente , 1158 ft, 16 ° 59′S / 65 ° 24′W, 1 male, 10–12.IX.2012, Wappes, Skelley and Bonaso leg. ( MZSP, formerly ACMT) . FRENCH GUIANA (new country record): Kaw Rd. 6, Amazone Nature Lodge, Montagne de Kaw , 4°33′N / 52°11′W, 970 ft, 1 male, 4 females, 11–23.VIII.2017, Wappes and Morris leg. ( ACMT) ; Kaw Rd , pk 31, 1 female, 20–23.VIII.1995, Wappes leg. ( MZSP, formerly ACMT) ; 2 females, 23.25. VIII.1995, Wappes leg. ( FSCA, formerly ACMT) ; pk 32, 1 male, 3 females, 24.VIII.1995, Wappes leg. ( FSCA, formerly ACMT) ; pk 39, 2 females, 19–20.VIII.1995, Wappes leg. ( FSCA, formerly ACMT) ; 3 females, 20.VIII.1995, Wappes leg. (1 female MZSP, 2 females FSCA, formerly ACMT) ; Amazone Nature Lodge, Kaw Rd. 6, 4.550330 / −52.170310, 1 male, 2 females, 27.IX–6.X.2013, Morris and Wappes leg. ( RFMC) ; 2 males, 11–23.VIII.2017, Morris and Wappes leg. ( RFMC) ; Kaw Mt, Camp Caimans , 3 males, 26.VIII–7-IX.2019, J. Vlasak leg. ( DHCO) .

Remarks. Hamaederus glaberrimus was described based on a single specimen from Brazil (Minas Gerais). According to Martins (1979), the holotype is a male. However, it is a female. Although it was not mentioned in the original description, the posterior half of the dorsal surface of the scape of H. glaberrimus is transversely rugose (but also with distinct punctures), especially on the posterior third, and does not have an apical cicatrix as mentioned by Martins and Monné (2002).

Figures

Figures 43–49. Hamaederus glaberrimus (Martins, 1979). 43–48) Holotype female. 43) Dorsal habitus. 44) Ventral habitus. 45) Scape, pedicel, and antennomeres III–V. 46) Scape. 47) Lateral habitus. 48) Prosternal and mesoventral processes. 49) Male, dorsal habitus.

Figures 50–58. Hamaederus glaberrimus (Martins, 1979). 50–56) Male. 50) Dorsal habitus. 51) Ventral habitus. 52) Lateral habitus. 53) Head, frontal view. 54) Scape. 55) Scape, pedicel, and antennomeres III–V. 56) Prosternal and mesoventral processes. 57–58) Female. 57) Dorsal habitus. 58) Prosternal and mesoventral processes.