Lamacoscylus albatus, Martins, Ubirajara R., Santos-Silva, Antonio & Galileo, Maria Helena M., 2015

Martins, Ubirajara R., Santos-Silva, Antonio & Galileo, Maria Helena M., 2015, Fourteen new species, one new genus, and eleven new country or state records for New World Lamiinae (Coleoptera, Cerambycidae), Zootaxa 3980 (1), pp. 81-105 : 95-96

Lamacoscylus albatus sp. nov.

( Figs. 36–39 )

Description. Integument black; base of antennomeres III–X with narrow orange ring; (more distinct ventrally); elytra dark-brown; most of basal half of pro- and mesotarsomeres I–II orange.

Head. Frons wider than long (greatest width equal to 1.2 times length); finely, moderately abundantly punctate (punctures partially obscured by pubescence); pubescence dense, thick, white, interspersed with long and short, moderately abundant, brown setae; pubescence brown on V-like area around coronal suture, near base of antennal tubercles. Frontal side of antennal tubercles with dark-brown pubescence, partially forming crest. Coronal suture distinct from base of frons to pronotal anterior edge. Vertex coarsely, sparsely punctate towards eyes, finer and somewhat denser towards anterior edge of prothorax; pubescence brown, short, moderately dense, but barely visible in dorsal view, sparsely interspersed with long brown setae. Area behind eyes coarsely, moderately punctate; pubescence short, brown. Part of genal region and area behind inferior ocular lobes partially covered in wide band of white pubescence, joining that of frons, rounded at its apex, not reaching anterior edge of prothorax. Genal apex nearly glabrous. Genae slightly shorter than length of lower ocular lobe. Distance between superior ocular lobes equal to 0.3 times scape length; distance between inferior ocular lobes, in frontal view, equal to 0.7 times scape length. Antennae as long as 1.5 times elytral length; attaining its apex near middle of antennomere IX; ventral side of scape, pedicel, and antennomeres III–X with long, dark-brown setae (sparser and shorter towards antennomere X); antennal formula (ratio) based on antennomere III: scape = 0.60; pedicel = 0.13; IV = 0.70; V = 0.44; VI = 0.39; VII = 0.33; VIII = 0.29; IX = 0.26; X = 0.24; XI = 0.26.

Thorax. Pronotum at middle coarsely, moderately punctate, finer laterally; pubescence brown, short, barely visible in some areas, depending on angle of light, source, forming three longitudinal bands (one medially, one at each side); long, brown setae sparsely intermixed. Sides of prothorax rounded at middle; coarsely, moderately punctate, brown pubescent. Prosternum with a wide band of white pubescence laterally, darker, finer and less dense medially. Prosternal process, mesosternum and metasternum covered with thick white pubescence (obscuring the surface). Metasternum deeply sulcate on posterior one-third; pubescence white, dense, thick laterally, gradually finer and sparser towards middle; central area around metasternal suture glabrous. Elytra coarsely, abundantly punctate; suture elevated; humeral carina very distinct, almost attaining apex; between suture and humeral carina two slightly elevated carinae, from base to near apex (innermost slightly more distinct); apex sub-rounded; pubescence brown, short, dense; abundant, moderately short, yellow to brown setae intermixed.

Abdomen. Wide, uniformly convex; urosternites with short, dense, fine, white pubescence (less conspicuous on center of urosternite V). Legs. Coxae and femora partially covered by, fine white pubescence. Metatarsomere I about as long as II–III together.

Variability. Paratype female—basal one-third of meso- and metatarsomeres I–II orange; paratype maleintegument dark-brown; antennomeres III–IV brown with basal orange ring (missing remaining antennomeres); pubescence of urosternites brownish-yellow; basal one-third of meso- and metatarsomeres I–II orange.

Dimensions in mm (male/female). Total length, 6.3/7.1–8.3; length of prothorax at center, 1.0/1.1–1.2; widest width of prothorax (between apices of tubercles), 1.2/1.4–1.5; anterior width of prothorax, 1.1/1.2–1.3; posterior width of prothorax, 1.2/1.3–1.5; humeral width, 1.6/1.8–2.1; elytral length, 4.6/5.2–6.2. The largest dimensions of females are those of the holotype.

Type material. Holotype female from MEXICO, Michoacán: Cerro de Cárnica National Park (Km 179.5 on highway 15, 8,300’), 24.VIII.2002, C. L. Bellamy col. ( MZSP). Paratypes—MEXICO, Jalisco: Guadalajara, male, [no date indicated], McConnell col. ( MZSP); Nevado de Colima Road (7 miles W highway junction, near Atenquique), female, 5.VIII.1978, Plitt & Schaffner col. ( ACMT).

Diagnosis. Lamacoscylus albatus differs from L. humilis (Bates, 1881) as follows: Vertex and pronotum without bands of yellow pubescence (present in L. humilis ); frons with white pubescence (absent in L. humilis ); metasternum with white pubescence (uniformly brown in L. humilis ); antennomere IV, at most, with narrow orange ring (almost half orange in L. humilis ). It differs from L. usingeri (Linsley, 1935) by the vertex and pronotum without central yellow band (present in L. usingeri ), by antennomere IV almost completely dark (almost completely light in L. usingeri ), and by the femora unicolored (bicolored in L. usingeri ). It also differs from L. obscurus sp. nov. by the antennae surpassing the elytral apex (not reaching it in L. obscurus ); metasternum with orange pubescence (brownish in L. obscurus ), tarsomeres I–II (at least on pro- and mesotarsi) orange at base (completely dark in L. obscurus ), and by the humeral carina ending short of the elytral apex (extends somewhat farther in L. obscurus ).

Etymology. Latin, albatus = clothed in white; relating to the color of the ventral pubescence.

Figures

FIGURES 23 – 36. 23 – 24. Scleronotus virgatus, holotype, male: 23. Head, frontal; 24. Lateral habitus. 25 – 27. Oreodera casariae, holotype male: 25. Dorsal habitus; 26. Lateral habitus; 27. Head, frontal view. 28 – 31. Psapharochrus langeri, holotype male: 28. Dorsal habitus; 29. Ventral habitus; 30. Lateral habitus; 31. Head, frontal view. 32 – 35. Aegomorphus mexicanus, holotype male: 32. Dorsal habitus; 33. Ventral habitus; 34. Lateral habitus; 35. Head, frontal view. 36. Lamacoscylus albatus, holotype female, head, frontal view.

FIGURES 37 – 45. 37 – 39. Lamacoscylus albatus, holotype female: 37. Dorsal habitus; 38. Ventral habitus; 39. Lateral habitus. 40 – 43. Lamacoscylus obscurus, holotype male: 40. Dorsal habitus; 41. Ventral habitus; 42. Lateral habitus; 43. Head, frontal view. 44. Piruanycha pitilla Galileo & Martins, 2005, holotype female, protarsus, dorsal view. 45. Piruanycha wappesi, holotype female, protarsus, dorsal view.