Priacma renaria Tan, Ren & Shih, 2006, sp. nov.
Creators: name: Tan, Jingjing
name: Ren, Dong
name: Shih, Chungkun
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cupedidae
Priacma
Priacma renaria

description: Priacma renaria sp. nov.
(Figs. 4, 19–23, 25)
Diagnosis. Differs from P. serrata in the absence of spines on edge of elytra. From P. corrupta in the mesosternum of new species without cross suture, from P. longicapitis and P. oculata in the ventral head surface of new one without grooves for inserting antennae, from P. striata in the elytron of new one without paler flecks, from P. sanzii in new one’s antennal second segment shorter than third segment. P. renaria sp. nov. is distinct from other new species described here by being largest, by having elytral cells polygonal without black macula on their margins, and by the presence of about 43 elytral cells in a row.
Description. Body length 19.5 mm, body width 5.0 mm, elytron length 14.0 mm. Large­sized and subcylindrical beetle, covered with tubercles (Fig. 4).
Head wider than long, trapeziform, bearing two pairs of tubercles, anterior pair of tubercles at base of antennae, conical, small, shape of posterior ones like kidney­form, larger than anterior pair; eyes medium­sized; mandibles prominent, broad, flattened, shorter than half width of head, tridentate in horizontal cutting surface (Fig. 22), cervical constriction distinct.
Antennae filiform, incomplete (with 9 visible segments), scape shortest, thicker than other segments, pedicel 0.85 times as long as third antennomere (Figs. 19, 22), following segments homonomous.
Pronotum transverse, slightly wider than head, narrowed towards base, about 0.85 times as wide as long at posterior edge, anterior margin straight, anterior angles oblique (Figs. 19, 22), without propleuron, disc of pronotum bearing 2 oblong elevations; scutellum sub­triangular.
Elytra about 2 times as wide as prothorax, 4.4 times as long as wide, epipleural rim narrow, with 10 rows of cells, elytral cells quadrangular, without black macula on their margins (Figs. 21, 25), approximately 43 cells formed in a row.
Ventral surface (Fig. 20) with gula rectangular, reaching posterior ridge of the head, widening posteriorly, genae widely separated ventrally. Procoxal cavities separated, prosternal process extending beyond coxae. Metaventrite trapezoidal, transverse, 0.7 times as wide as long (at posterior margin), without longitudinal suture on metaventrite (Fig. 23). Abdomen with 5 visible ventrites superimposing each other, narrowed from the base of fifth visible ventrite, first visible abdomen ventrite longest, 2–4 visible abdomen ventrites equal in length, last visible ventrite 2.2 times as long as the previous one, its apex tapered.
Legs with procoxae rounded, small, protrochanter triangular, profemora long, thick, protibiae comparatively slim, shorter than profemora; mesocoxae oblong, mesotrochanter small, circular, mesotibiae as long as mesofemora; metafemora short, metatibiae longer than metafemora, metatarsi with 5 segments, fifth segment longest, following segments homonomous (Fig. 20).
Holotype. Nearly complete adult, No. CNU –C–LB2006002, housed in the Key Lab of Insect Evolution & Environment Change, College of Life Science, Capital Normal University, Beijing, China.
Locality and horizon. Collected near Chaomidian Village, Beipiao City, Liaoning Province, China; the Yixian Formation, Late Jurassic­Early Cretaceous (Late Tithonian to the Berriasian).
Etymology. The specific epithet derives from the Latin adjective renarius, ­ a, ­ um (of or belonging to kidneys). It refers to the kidney­shaped tubercles on the head.
description: Published as part of Tan, Jingjing, Ren, Dong & Shih, Chungkun, 2006, First record of fossil Priacma (Coleoptera: Archostemata: Cupedidae) from the Jehol Biota of western Liaoning, China, pp. 55-68 in Zootaxa 1326 on pages 65-67, DOI: 10.5281/zenodo.174106