Euparius 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 : 2-4

Euparius elongatus sp. nov.

Figure 1

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Holotype. Deposited in the PACO (accession # C-106).

Description. Length body, 4.9 mm; length rostrum, 0.6 mm. Body brown with covering of pale, appressed setae. Rostrum wide and short, 0.6 times as long as pronotum, flat; mandibles with small middle ventral tooth and large basal tooth; antennal scrobes foveiform lateral, slightly touching eyes; forehead wide, flattened, punctate; eyes large, circular, distinctly convex; vertex convex and punctate; temples quite short, 0.8 times as long as length of eye; antennae inserted at base of rostrum, quite long, almost reaching base of pronotum; club not compact, broad, 2.3 times longer than wide. Pronotum bell-shaped; 1.2 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 and finely punctate; transverse dorsal pronotal carina basal; scutellum wide-trapezoidal. Elytra elongate and distinctly convex, 2.4 times longer than wide at base, 2.6 times longer than wide in middle, 2.8 times longer than wide at apical fourth, 2.8 times as long as pronotum; greatest width of humeri behind middle; humeri weakly flattened; striae regular and thin; strial punctures small, rounded; elytral intervals convex, quite wide, 2.0–2.7 times as wide as striae, small and faintly punctate; second–fourth intervals distinctly convex in first quarter of elytra; apices of elytra not rounded; pygidium not concealed. Thorax faintly punctate; precoxal portion of prosternum elongate, 2.8 times as long as procoxal cavities, 4.0 times as long as postcoxal portion; postcoxal portion 0.7 times as long as procoxal cavities; procoxal cavities narrowly separated; mesocoxal cavities widely separated, metanepisternum quite narrow. Abdomen convex; first ventrite 0.9 times as long as length of metacoxal cavity; second ventrite

PALAEO- ELECTRONICA.ORG

1.1 times as long as length of first ventrite; third ventrite 0.8 times as long as length of second ventrite; fourth ventrite 0.9 times as long as length of third ventrite; fifth ventrite 1.8 times as long as length of fourth ventrite. Legs long; pro- and mesocoxae round; metacoxae transverse; femora clavate, without teeth; trochanters obconical; profemora 3.1 times longer than wide; mesofemora 3.9 times longer than wide; metafemora 4.1 times longer than wide; tibiae almost straight; protibiae 9.8 times longer than wide in middle; mesotibiae 10.3 times longer than wide in middle; metatibiae 6.0 times longer than wide in middle; tarsi long; all third tarsomeres separated; first and second tarsomeres 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 2.5 times longer than wide at base; second tarsomere 1.4 longer than wide at base, 0.7 times as long as and 1.3 times as wide as first tarsomere; third tarsomere equal in length and width, 0.4 times as long as and 0.5 times as wide as second tarsomere; fifth tarsomere 4.8 times longer than wide at base, 3.0 times as long as and 0.6 times as wide as second tarsomere; mesotarsi: first tarsomere 2.3 times longer than wide at base; second tarsomere 1.3 times as long as first tarsomere; fifth tarsomere 3.7 times longer than wide at base; metatarsi: first tarsomere 4.7 times longer than wide at base; second tarsomere 0.9 times as long as first tarsomere; fifth tarsomere 3.7 times longer than wide at base.

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

Etymology. The specific epithet is from the Latin “elongatus ” equals long, in reference to the body form of the fossil.

Comparison. The new species is similar to E. apicalis ( Fahraeus, 1839) from Brazil and French Guiana but differs by the smaller body size, narrower brown body, elytra without spots of setae and convex elytral intervals. From E. placidus ( Jordan, 1937) from Central America, it differs by the narrower body, convex elytral intervals, and longer tarsi.

POINAR, & LEGALOV: NEW ANTHRIBIDAE IN AMBER

Remarks. The new species belongs to the genus Euparius of the tribe Cratoparini based on the mandibles with a small middle tooth on the ventral cutting edge and a large basal tooth, eyes circular and antennal scrobes slightly touching the eyes.

Figures

FIGURE 1. Holotype of Euparius elongatus sp. nov. PACO no. C-106 in Mexican amber. 1, dorsal view, scale bar equals 1.0 mm; and 2, lateral view, scale bar equals 1.3 mm.