Piesocorynus brevitectus, Poinar & Legalov, 2016

Poinar, George & Legalov, Andrei A., 2016, New Anthribidae (Coleoptera: Curculionoidea) in Dominican and Mexican ambers, Palaeontologia Electronica 148 (1), pp. 1-38 : 14

Piesocorynus brevitectus sp. nov.

Figure 8

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Holotype. Probably male. Deposited in the PACO (accession # C-101).

Description. Length body, 4.6 mm; length rostrum, 1.1 mm. Body black with covering of distinct, dense, pale, appressed setae; thorax and abdomen brown. Rostrum wide, 0.8 times longer than wide in middle, 0.5 times as long as pronotum, flattened, without dorsal median carina, densely punctate; antennal scrobes foveiform, lateral; forehead wide, flattened, punctate; eyes rounded, coarsely faceted, fewer than 26 rows of ommatidia perpendicular to long axis, not emarginate, convex, 1.5 times longer than wide; vertex weakly convex, densely punctate; temples short, 0.3 times as long as length of eye; antennae inserted in first third of rostrum, elongate, extending beyond humeri and reaching first third of elytra; funicle with second to eighth antennomeres elongate-conical; second antennomere 2.5 times longer than wide; third antennomere 4.7 times longer than wide, 1.4 times as long as and 0.8 times as narrow as second antennomere; fourth antennomere 3.5 times longer than wide, equal in length and 1.3 times as wide as third antennomere; fifth antennomere 3.0 times longer than wide, 0.9 times as long as and equal in width to fourth antennomere; sixth antennomere 3.0 times longer than wide, 0.8 times as long as and 0.8 times as wide as fifth antennomere; seventh antennomere 2.5 times longer than wide, 1.1 times as long as and 1.3 times as wide as sixth antennomere; eighth antennomere 1.3 times longer than wide, 0.9 times as long as and 1.8 times as wide as seventh antennomere; club not compact, long, 0.5 times as long as funicle; first antennomere of club 1.2 times longer than wide, 1.7 times as long as and 1.9 times as wide as eighth antennomere; second antennomere of club 0.8 times longer than wide, 0.7 times as long as and 1.1 times as wide as first antennomere of club; third antennomere of club 1.6 times longer than wide, 1.2 times as long as and 0.6 times as narrow as second antennomere of club. Pronotum bell-shaped; 1.4 times longer than wide at apex, 0.9 times longer than wide in middle and at base, with quite long lateral carinae; disk flattened, densely punctate, transverse dorsal pronotal carina antebasal; distance between transverse carina and base of pronotum 0.08 times as long as pronotum; its sides evenly rounded; scutellum trapezoidal. Elytra convex, 1.2 times longer than wide at base and in middle, 1.4 times longer than wide at apical fourth, 1.5 times as long as pronotum; greatest width behind middle; elytron without tubercles; humeri weakly flattened; striae regular and thin; strial punctures rounded, dense; elytral intervals weakly convex; apices of elytra not rounded; pygidium not concealed. Thorax punctate; precoxal portion of prosternum elongate, postcoxal portion short; procoxal cavities narrowly separated; mesocoxal cavities widely separated, metanepisternum quite wide, 4.9 times longer than wide in middle. Abdomen convex; first ventrite equal in length to length of metacoxal cavity; second ventrite 0.9 times as long as length of first ventrite; third ventrite 0.8 times as long as length of second ventrite; fourth ventrite 1.4 times as long as length of third ventrite; fifth ventrite 1.2 times as long as length of fourth ventrite. Legs long; pro- and mesocoxae round; metacoxae transverse; femora clavate, without teeth; trochanters obconical; metafemora 2.5 times longer than wide; tibiae almost straight; metatibiae 5.4 times longer than wide in middle; tarsi long; first to third tarsomeres conical; second tarsomere embracing third tarsomere laterally; fifth elongate; tarsomeres with pulvilli on underside; tarsal claws free, large, diverging, with basal teeth.

Type locality. Amber mine in Chiapas Highlands of the Simojovel area in Chiapas, Mexico .

Etymology. The specific epithet is taken from the Latin “brevis” equals short and the Latin “tego” equals cover in reference to the short elytra.

Figures

FIGURE 8. Holotype of Piesocorynus brevitectus sp. nov. PACO no. C-101 in Mexican amber. 1, dorsal view, scale bar equals 1.1 mm; 2, ventral view, scale bar equals 1.3 mm; 3, and lateral view, scale bar equals 1.2 mm.