Piesocorynus parvocorpus, 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 : 23

Piesocorynus parvocorpus sp. nov.

Figure 13

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Holotype. Probably female. Deposited in the PACO (accession # C-105).

Description. Length body, 2.5 mm; length rostrum, 1.0 mm. Body brown with covering of dense, pale, appressed setae. Rostrum short, equal in length and width, 0.6 times as long as pronotum, flattened, without dorsal median carina, punctate; antennal scrobes foveiform, lateral; forehead wide, flattened, punctate; eyes coarsely faceted, fewer than 26 rows of ommatidia perpendicular to long axis, not emarginate, large, weakly convex, rounded; vertex weakly convex, densely punctate; temples short; antennae inserted in first third of rostrum, elongate, not reaching humeri; funicle with second to eighth antennomeres elongate-conical; club not compact, quite wide. Pronotum bell-shaped; 1.0 times longer than wide at apex, 0.8 times longer than wide in middle and at base, with quite long lateral carinae; disk weakly flattened, densely punctate, transverse dorsal pronotal carina antebasal; distance between transverse carina and base of pronotum 0.13 times as long as pronotum; scutellum trapezoidal. Elytra weakly flattened, 1.3 times longer than wide at base and in middle, 1.4 times longer than wide at apical fourth, 2.0 times as long as pronotum; greatest width at humeri and behind middle; elytron without tubercle; humeri convex; striae regular and thin; strial punctures small, rounded and dense; elytral intervals flattened, wide, 8.0–10.0 times as wide as points in striae, weakly punctate; apices of elytra not rounded; pygidium not concealed. Thorax punctate; precoxal portion of prosternum elongate, 1.3 times as long as length of procoxal cavity; postcoxal portion short; procoxal cavities narrowly separated; mesocoxal cavities widely separated, metanepisternum narrow. Abdomen convex; 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 1.1 times as long as length of fourth ventrite. Legs long; pro- and mesocoxae round; metacoxae transverse; femora clavate, without teeth; trochanters obconical; mesofemora 2.6 times longer than wide in middle; metafemora 3.3 times longer than wide in middle; tibiae almost straight; metatibiae 8.8 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.

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

Etymology. The specific epithet is from the Latin “parvus” equals small, and the Latin “ corpus” equals body, in reference to the small size of the fossil.

Figures

FIGURE 13. Holotype of Piesocorynus parvocorpus sp. nov. PACO no. C-105 in Mexican amber. 1, dorsal view, scale bar equals 0.5 mm; 2, ventral view, scale bar equals 0.4 mm; and 3, lateral view, scale bar equals 0.4 mm.