Piesocorynus elongatus, 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 : 17-19

Piesocorynus elongatus sp. nov.

Figure 10

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Holotype. Probably female. Deposited in the PACO (accession # C-102).

Description. Length body, 4.1 mm; length rostrum, 1.1 mm. Body brown with covering of distinct, dense, pale, appressed setae. Rostrum wide, 0.7 times as long as pronotum, flattened, without dorsal median carina, punctate; antennal scrobes foveiform, lateral; forehead wide; eyes coarsely faceted, fewer than 26 rows of ommatidia perpendicular to long axis, convex; temples short; antennae inserted in first third of rostrum, elongate, not reaching humeri; antennomeres elongate-conical; second antennomere 2.0 times longer than wide; second–fourth antennomeres subequal in length; third antennomere 2.7 times longer than wide, 0.8 times as narrow as second antennomere; fourth antennomere 3.2 times longer than wide, 0.8 times as narrow as third antennomere; fifth antennomere 2.0 times longer than wide, 0.8 times as long as and 1.2 times as wide as fourth antennomere; sixth antennomere 1.7 times longer than wide, 0.8 times as long as fifth antennomere; sixth–eighth antennomeres subequal in length; seventh antennomere 1.3 times longer than wide, 1.3 times as wide as sixth antennomere; eighth antennomere equal in length and width, 1.3 times as wide as seventh antennomere; club not compact, wide; first antennomere of club 1.1 times longer than wide, 1.8 times as long as and 1.6 times as wide as eighth antennomere; second antennomere of club 0.8 times longer than wide, 0.9 times as long as and 1.1 times as wide as first antennomere of club; third antennomere of club 1.1 times longer than wide, equal in length and 0.8 times as narrow as second antennomere of club. Pronotum elongate, bell-shaped; 1.4 times longer than wide at apex, 1.2 times longer than wide in middle and 1.1 times longer than wide 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 almost straight; scutellum trapezoidal. Elytra flattened, 1.3 times longer than wide at base, 1.4 times longer than wide in middle, 1.6 times longer than wide at apical fourth, 1.4 times as long as pronotum; greatest width in humeri and behind middle; elytron without tubercles; humeri distinctly convex; striae regular and thin; strial punctures rounded, dense; elytral intervals weakly convex; apices of elytra not rounded; pygidium not concealed. Thorax densely punctate; precoxal portion of prosternum elongate, postcoxal portion short; procoxal cavities narrowly separated; mesocoxal cavities widely separated, metanepisternum narrow. Abdomen weakly convex; first ventrite 0.9 times as long as length of metacoxal cavities; second ventrite 1.3 times as long as length of first ventrite; third ventrite 0.9 times as long as length of second ventrite; fourth ventrite 0.9 times as long as length of third ventrite; fifth ventrite 1.1 times as long as length of fourth ventrite. Legs long; pro- and mesocoxae round; metacoxae transverse; femora clavate, without teeth; trochanters obconical; profemora 3.0 times longer than wide; metafemora 3.2 times longer than wide; tibiae almost straight; protibiae 6.7 times longer than wide in middle; metatibiae 7.5 times longer than wide in middle; tarsi long; first to third tarsomeres conical; second tarsomere embracing third tarsomere laterally; fifth tarsomere elongate; tarsomeres with pulvilli on underside; tarsal claws free, large, diverging, with basal teeth; metatarsi: first tarsomere 5.4 times longer than wide at base; second tarsomere 1.3 longer than wide at base, 0.4 times as long as and 1.7 times as wide as first tarsomere.

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

Etymology. The specific epithet is taken from the Latin “elongatus ” equals prolonged, in reference to the body shape.

Figures

FIGURE 10. Holotype of Piesocorynus elongatus sp. nov. PACO no. C-102 in Mexican amber. 1, dorsal view, scale bar equals 1.0 mm; 2, ventral view, scale bar equals 0.8 mm; and 3, lateral view, scale bar equals 0.8 mm.