Migorybia santossilvai García, Botero, and Martínez, 2020

García, Kimberly, Botero, Juan Pablo & Martínez, Neis José, 2020, New species and new geographical records in South American Piezocerini (Coleoptera: Cerambycidae) with revised keys to species of Alienosternus and Hemilissa, The Canadian Entomologist 152 (1), pp. 18-35 : 32-34

Migorybia santossilvai García, Botero, and Martínez , new species

http://zoobank.org/ urn:lsid:zoobank.org:act:0171DA65-5AED-41EC-BDFE-9ADCB8F5FD7C .

Figures 26–30 .

Type material

Holotype female. COLOMBIA, Bolívar : San Jacinto (Reserva La Flecha, 324 m, 9°51 0 12.4 00 N, 75°10 0 41.4 00 W), 15–16.iv.2018, K. García, “trampa de luz UV,” MPUJ _ ENT 0061406 ( MPUJ) . Paratype. COLOMBIA, Bolívar : San Jacinto (Reserva La Flecha, 324 m, 9°51 0 12.4 00 N, 75°10 0 41.4 00 W), one male, 15–16.iv.2018, K. García, “trampa de luz blanca” ( UARC) .

Diagnosis

This species can be distinguished from other species in the genus by the dark integument, central area of pronotum without depression, pronotum without distinct gibbosities.

Description

Female. Integument reddish brown; antennae and ventrites slightly lighter.

Head. Frons coarsely, shallowly, confluently punctate; with sparse, short setae. Central area between antennal tubercles shallowly, confluently punctate; with longitudinal, well-marked carina on each side, between antennal tubercle and median groove, with uniformly dense, long setae. Remaining surface of vertex coarsely, confluently punctate. Antennal tubercle with apex projected. Gulamentum finely, transversely striate, more distinctly towards mentum. Mandibles with long, sparse pale yellow setae on outer surface. Distance between upper eye lobes 3.4 times width of one upper eye lobe. Antennae reaching elytral apex at antennomere XI. Scape coarsely, densely, confluently punctate; with long, uniformly spaced setae. Antennal formula (ratio) based on length of antennomere III (only the holotype measured): scape = 0.61; pedicel = 0.16; IV = 0.92; V = 0.87; VI = 0.74; VII = 0.74; VIII = 0.55; IX = 0.61; X = 0.50; XI = 0.71.

Thorax. Prothorax about 1.1 times longer than maximum width, sides gradually, uniformly rounded; posterior margin slightly constricted. Pronotum coarsely punctate; posterior area strongly semicircularly depressed; with sparse, long setae throughout, Prosternum densely, confluently punctate; with sparse, long, pale yellow setae. Prosternal process narrowed at middle and expanded at apex, width at narrowest point equal to 1/4 of procoxal cavity width. Mesoventrite tumid, slightly depressed anteriorly, surface rugose. Mesoventral process about 1/2 of mesocoxal cavities width, deeply emarginate at apex. Metanepisternum with short, abundant, uniformly spaced white setae. Metaventrite microsculptured anteriorly and laterally, smoother towards central and posterior region; with long, pale yellow setae laterally. Scutellum glabrous, rounded at apex. Elytra coarsely, deeply, abundantly punctate on basal half, gradually finer and sparser towards apex; with sparse, long setae arranged in five longitudinal rows; apex obliquely truncate, with spine at outer angle. Legs with long, rather uniformly spaced setae; tibiae distinctly carinate.

Abdomen. Ventrites microsculptured on anterior margin, with long setae; apex of ventrite V truncate.

Measurements. Holotype, female, total length: 7.6 mm, prothorax length: 1.8 mm, prothorax width at widest point: 1.6 mm, elytral length: 5.2 mm, humeral width: 1.8 mm. Paratype, male, total length: 8.2 mm, prothorax length: 1.7 mm, prothorax width at widest point: 1.6 mm, elytral length: 5.5 mm, humeral width: 1.9 mm.

Males. Antennae longer than females, reaching elytral apex at antennomere X. Elytral apex slightly emarginate in males, with inner apex slightly projected.

Etymology

The specific name is in honour of our friend and colleague Antonio Santos-Silva, in recognition of his countless contributions to Cerambycidae and for his friendship and willing assistance to others.

Remarks

Migorybia santossilvai differs from M. miranda Martins, 1985 by the darker, reddish-brown integument (more red in M. miranda ), pronotum without deep longitudinal central depression at posterior half (in M. miranda , with longitudinal central depression at posterior half), and without evident gibbosities (with two evident gibbosities at posterior half in M. miranda ). Additionally,

according to Tavakilian and Chevillotte (2019) Migorybia is restricted to Venezuela, so we here record this genus in Colombia for the first time.

Figures

Figs. 26–30. Migorybia santossilvai new species. 26, holotype female, dorsal view, 27, holotype female, ventral view; 28, holotype female, lateral view; 29, holotype female, details of head, frontal view; 30, paratype male, dorsal view.