Piezobarra brevisensoriata, 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 : 23-26

Piezobarra brevisensoriata sp. nov.

Figure 14

zoobank.org/ DAF892AA-5B3A-44DA-8A5F-BD30DF8396EC

Holotype. Deposited in the PACO (accession # C-91).

Description. Length body, 4.4 mm; length rostrum, 1.3 mm. Body black with covering of dark, appressed setae; pronotum and elytra without spots of setae. Rostrum wide, short, 0.4 times as long as pronotum, flattened, without dorsal median carina; antennal scrobes foveiform, lateral; fore-

PALAEO- ELECTRONICA.ORG head wide, flat, densely punctate; eyes coarsely faceted, fewer than 26 rows of ommatidia perpendicular to long axis, not emarginate, large, convex, oval, 1.5 times longer than wide; vertex weakly convex, densely punctate; temples short; antennae inserted in first third of rostrum, quite short, reaching humeri; funicle with second to eighth antennomeres conical; seventh antennomere 2.0 times longer than wide; eighth antennomere 0.9 times longer than wide, 1.2 times as long as and 2.7 times as wide as seventh antennomere; club not compact, broad; first antennomere of club 0.5 times longer than wide, 1.1 times as long as and 1.9 times as wide as eighth antennomere; second antennomere of club 0.6 times longer than wide, subequal in length and 0.8 times as narrow as first antennomere of club; third antennomere of club 0.9 times longer than wide, subequal in length and 0.7 times as narrow as second antennomere of club. Pronotum wide-bell-shaped; 1.4 times longer than wide at apex, 0.9 times longer than wide in middle and 0.8 times longer than wide at base, with long lateral carinae; disk weakly flattened, densely punctate, transverse dorsal pronotal carina almost basal; scutellum trapezoidal. Elytra weakly convex, 1.0 times longer than wide at base, 0.8 times longer than wide in middle, 1.2 times longer than wide at apical fourth, 1.4 times as long as pronotum; greatest width behind middle; elytron without tubercle; humeri weakly convex; striae regular and thin; strial punctures rounded and dense; elytral intervals weakly convex, quite wide, 1.7–2.4 times as wide as points in striae; apices of elytra not rounded; pygidium not concealed. Thorax punctate; precoxal portion of prosternum elongate, equal in length to length of procoxal cavity; postcoxal portion short; procoxal cavities narrowly separated; mesocoxal cavities widely separated, metanepisternum broad, 2.8 times longer than wide in middle. Abdomen convex; first ventrite 1.2 times as long as length of metacoxal cavity; second ventrite 0.9 times as long as length of first ventrite; third ventrite equal in length to 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; metafemora 2.4 times longer than wide in middle; tibiae almost straight; protibiae 7.9 times longer than wide in middle; metatibiae 6.3 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 2.1 times longer than wide at base; second tarsomere 1.3 longer than wide at base, equal in length and 1.7 times as wide as first tarsomere; third tarsomere equal in length and width, 0.4 times as long as and 0.6 times as wide as second tarsomere; fifth tarsomere 3.3 times longer than wide at base, 0.9 times as long as and 0.3 times as wide as second tarsomere; metatarsi: first tarsomere 3.1 times longer than wide at base; second tarsomere 1.3 longer than wide at base, 0.7 times as long as and 1.7 times as wide as first tarsomere; third tarsomere equal in length and width, 0.5 times as long as and 0.6 times as wide as second tarsomere; fifth tarsomere 5.0 times longer than wide at base, 1.0 times as long as and 0.3 times as wide as second tarsomere.

Type locality. Amber mine in the Cordillera Septentrional of the northern portion of the Dominican Republic.

Etymology. The specific epithet is taken from the Latin “brevis” equals short, and the Latin “sentio” equals feel, in reference to the short antennae.

Comparison. This new species differs from P. sparsilis Jordan, 1906 from Central America by the larger and broader body size, longer lateral pronotal carina, shorter antennae, and pronotum and elytra lacking clusters of setae.

Remarks. This new species belongs to the genus Piezobarra Jordan, 1906 and is unique in having a basal transverse pronotal carina and very short antennae.

Figures

FIGURE 14. Holotype of Piezobarra brevisensoriata sp. nov. PACO no. C-91 in Dominican amber. 1, dorsal view, scale bar equals 1.2 mm; and 2, lateral view, scale bar equals 1.0 mm.