Piesocorynus villosus, 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 : 21-23

Piesocorynus villosus sp. nov.

Figure 12

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Holotype. Probably female. Deposited in the PACO (accession # C-104).

Description. Length body, 4.8 mm; length rostrum, 0.5 mm. Body brown with covering of distinct, dense, pale, appressed setae. Rostrum short, 1.1 times longer than wide at apex, 0.9 times longer than wide in middle, 1.1 times longer than wide at base, 0.7 times as long as pronotum, flattened, without dorsal median carina, densely punctate; antennal scrobes foveiform, lateral; forehead wide, 0.8 times as narrow as rostrum base width, flattened, punctate; eyes coarsely faceted, fewer than 26 rows of ommatidia perpendicular to long axis, not emarginate, large, convex, round, vertex weakly convex, densely punctate; temples short; antennae inserted in first third of rostrum, elongate, reaching humeri; funicle with second to eighth antennomeres elongate-conical; second antennomere 5.0 times longer than wide; third antennomere 4.1 times longer than wide, 0.9 times as long as and 1.1 times as wide as second antennomere; second and third antennomeres equal in width; fourth antennomere 2.7 times longer than wide, 0.7 times as long as third antennomere; fifth antennomere 2.3 times longer than wide, 1.2 times as long as and 1.4 times as wide as fourth antennomere; fifth and sixth antennomeres equal in width; sixth antennomere 3.0 times longer than wide, 1.3 times as long as fifth antennomere; seventh antennomere 3.2 times longer than wide, 0.9 times as long as and 0.8 times as wide as sixth antennomere; eighth antennomere 2.3 times longer than wide, 0.9 times as long as and 1.2 times as wide as seventh antennomere; club not compact, 0.4 times as long as funicle; first antennomere of club 1.2 times longer than wide, equal in length and 2.0 times as wide as eighth antennomere; second antennomere of club equal in length and width, equal in length and 1.2 times as narrow as first antennomere of club; third antennomere of club 1.7 times longer than wide, 1.4 times as long as and 0.9 times as narrow as second antennomere of club. Pronotum bell-shaped; 1.8 times longer than wide at apex, 1.0 times longer than wide in middle and 1.1 times longer than wide at base, with long lateral carinae; disk weakly flattened, densely punctate, transverse dorsal pronotal carina antebasal; distance between transverse carina and base of pronotum 0.15 times as long as pronotum; scutellum trapezoidal. Elytra weakly flattened, 1.4 times longer than wide at base and in middle, 1.3 times longer than wide at apical fourth, 1.9 times as long as pronotum; greatest width at humeri and behind middle; elytron without tubercle; humeri convex; striae regular and thin; strial punctures rounded and dense; elytral intervals flattened, quite wide, 2.0–3.3 times as wide as points in striae, weakly punctate; apices of elytra not rounded; pygidium not concealed. Thorax coarsely punctate; precoxal portion of prosternum elongate; postcoxal portion short; procoxal cavities narrowly separated; mesocoxal cavities widely separated, metanepisternum narrow. Abdomen convex; first ventrite 1.1 times as long as length of metacoxal cavity; second ventrite 0.8 times as long as length of first ventrite; third ventrite 1.1 times as long as length of second ventrite; fourth ventrite 1.2 times as long as length of third ventrite; fifth ventrite 1.4 times as long as length of fourth ventrite. Legs long; pro- and mesocoxae round; metacoxae transverse; femora clavate, without teeth; trochanters obconical; tibiae almost straight; protibiae 8.8 times longer than wide in middle; metatibiae 10.8 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; protarsi: first tarsomere 2.4 times longer than wide at base; second tarsomere 1.4 longer than wide at base, 1.4 times as long as and 2.4 times as wide as first tarsomere; third tarsomere equal in length and width, 0.3 times as long as and 0.4 times as wide as second tarsomere; fifth tarsomere 5.0 times longer than wide at base, 0.8 times as long as and 0.3 times as wide as second tarsomere; mesotarsi: first tarsomere 3.0 times longer than wide at base; second tarsomere 1.4 longer than wide at base, 0.8 times as long as and 1.8 times as wide as first tarsomere; third tarsomere equal in length and width, 0.6 times as long as and 0.8 times as wide as second tarsomere; fifth tarsomere 5.0 times longer than wide at base, 1.5 times as long as and 0.4 times as wide as second tarsomere; metatarsi: first tarsomere 3.7 times longer than wide at base; second tarsomere 1.4 longer than wide at base, 0.8 times as long as and 2.0 times as wide as first tarsomere; third tarsomere equal in length and width.

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

Etymology. The specific epithet is taken from the Latin “villosus ” equals hairy, regarding the layer of short hairs on the body.

Figures

FIGURE 12. Holotype of Piesocorynus villosus sp. nov. PACO no. C-104 in Mexican amber. 1, dorsal view, scale bar equals 0.9 mm; 2, ventral view, scale bar equals 0.7 mm; and 3, lateral view, scale bar equals 0.9 mm.