Sichuanortia Niisato & Liu, 2019

Niisato, Tatsuya & Liu, Bin, 2019, A new genus and species of Oemini (Coleoptera, Cerambycidae) from Sichuan Province, western China, Zootaxa 4629 (3), pp. 405-412 : 406

Sichuanortia Niisato & Liu , new genus

Type species: Sichuanortia zhouchaoi , new species.

Description. Body medium to large in size, broad, relatively flattened, with spinose antennomeres and uneven disc of pronotum, dense pubescent in general, and mottled so on elytra.

Head large and depressed, distinctly narrower than maximum width of pronotum; frons wider than long, thickly bordered on sides, deeply concave on sides of apical margin, with a narrow median furrow not attaining apical margin; clypeus transversely quadrate, almost truncate on apical margin; genae shallow, less than half depth of eyes; vertex with antennal tubercles strongly spinose; tempora strongly narrowed just behind eyes; eyes large, prominent, coarsely facetted, deeply emarginate, widely separated each other; gula deeply furrowed; mandibles symmetrical, angulate at middle of external margins, acute in apical 2/3, with a thick dent at apical 1/3 of each inner margin; maxillae each with galea and lacinia weakly developed, palpus slender and markedly long, terminal palpomere elongate and moderately dilated apicad in both sexes; labrum transverse, emarginate on apical margin; labium with ligula triangularly emarginate on apical margin, terminal palpomere arcuately dilated apicad. Antennae longer than body or sometimes not reaching elytral apices in female, not so elongated in antennomeres III–V, spinose at each apico-internal corner of III–VIII, slightly flattened in V–XI; scape thick, depressed; II twice length of apical width; III longest, distinctly longer than scape or slightly longer than IV.

Pronotum wider than long, arcuate on sides, not bordered along apical margin though narrowly so along basal margin; disc uneven, with a longitudinal costa along midline and a M-shaped costa on middle of basal half. Mesonotum with stridulatory files fine and closely furrowed; scutellum small, hardly raised

Elytra less than triple as long as wide; sides with quadrate humeri, subparallel in basal 2/3, simply rounded at apices; disc weakly convex, with a weak costa on each external 1/4 of basal half. Hind wings with venation typical of Oemina ; CuA 1 with a vestigial branch near base.

Prosternum with intercoxal process relatively narrow, dilated at apex; procoxal cavities strongly angulated externally, narrowly opened behind, with internal extensions of pleural processes reaching external 2/3 of coxae. Mesosternum with intercoxal process wide, emarginate on apical margin; mesocoxal cavities very narrowly opened to mesepimera. Abdomen weakly narrowed apicad, with anal ventrite transversely trapezoidal.

Legs stout; femora gradually clavate, compressed; tarsi relatively thin.

Genitalia in both sexes are similar to Oemospila .

Etymology. The genus name Sichuanortia is a combination of “ Sichuan ” and “ Nortia ”. “ Sichuan ” is the province of China that includes the type locality of the new beetle. “ Nortia ” is one member of the genera related to the new beetle. The gender is feminine.

Range. China: South Sichuan.

Diagnosis. This new genus is similar to Oemospila , but clearly distinguished by the deeply furrowed gula, antennomeres III–V not elongated, with each apex spinose, and mesocoxal cavities very narrowly opened to mese- pimera. In Oemospila , the gula is mostly smooth, antennomeres III–V are elongated and with smooth apices, and the mesocoxal cavities are broadly opened. The new genus can be distinguished from Nortia by the markedly long palpomeres of the maxillae and narrow but apically thickened prosternal process (prosternal process linear in Oemospila ).