Serica longipes Ahrens, Fabrizi & Liu, 2022

Ahrens, Dirk, Fabrizi, Silvia, Bai, Ming & Liu, Wangang, 2022, Taxonomic revision of Serica MacLeay, 1819 (sensu lato) from China and adjacent areas (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), with updates on Nipponoserica Nomura, 1972, Zootaxa 5186 (1), pp. 1-83 : 26-28

Serica longipes Ahrens, Fabrizi & Liu , new species

Figures 5I–L , 22

Type material examined. Holotype: ♂ “ China, Yunnan prov. 1.- 19.7.1992, Heishui 35km N Lijiang 27.13N; 100.19E lgt. S. Becvar / 557 Sericini : Asia spec.” ( ZFMK) . Paratypes: 2 ♂♂ “ China, Yunnan prov. Heishui 35km N Lijiang 18.6.- 4.7.1992, 27.13N; 100.19E lgt. S. Becvar ” ( CP) , 1 ♂ “ Mts. Yulongshan, Lijiang , Yunnan, 27.VI.1962, leg. Song Shimei ” ( IZAS) , 2 ♂♂ “ China, Yunnan prov.; 1993 Heishui 35km N Lijiang; 27.13N; 100.19E; S. Becvar leg.; 18.vi.-4.vii./ 859 Sericini : Asia spec.” ( CP) , 1 ♂ “ Yunnan 1800-2500m 25.10N 100.21E Weishan mt. 22.- 25.6.92 David Kral lgt.” ( NMPC) , 2 ♂♂, 4 ♀♀ “ China: N-Yunnan, Baiyungshan (Rai Railing Mts.) 2400m, Yong Ren , VII-2003 leg. Ying et al.” ( ZFMK) , 1 ♂ “ Nongkesuo, Bijie, Guizhou, 1970s, No. 113, leg. Yang / LW-191” ( IZAS) .

Description of the holotype. Length: 9.1 mm, elytral length: 6.6 mm, width: 4.4 mm. Body oblong, dark reddish brown, dull, legs brown, antenna yellow, with numerous short and long setae on dorsal surface.

Labroclypeus moderately wide, trapezoidal, lateral margins weakly convex and moderately convergent, producing a distinct angle with ocular canthus; anterior angles strongly rounded; anterior margin moderately sinuate medially, margins strongly reflexed; surface flat, finely and densely punctate, with numerous long and erect setae; frontoclypeal suture indistinct, curved; ocular canthus moderately short and narrow (1/3 of ocular width), finely and densely punctate, with 1–3 short terminal setae. Frons with dull toment, with coarse, dense punctures and numerous long setae. Antenna with nine antennomeres, club with three antennomeres, twice as long as remaining antennomeres combined, moderately reflexed. Eyes large, ratio diameter/ interocular width: 0.74. Mentum convexly elevated and flattened anteriorly.

Pronotum widest at base, lateral margins in basal half straight and subparallel, in anterior half convex and convergent anteriorly; anterior angles almost blunt and weakly produced, posterior angles blunt; anterior margin strongly convex, marginal line complete; basal margin without marginal line; surface with mixed coarse and fine, dense punctures, with numerous short and longer erect or forward-directed yellow setae. Hypomeron very weakly carinate ventrally. Scutellum narrow and long, triangular, with fine, dense punctation, at base with a smooth impunctate triangular area, with numerous short adjacent setae.

Elytra narrow, elongate, widest in posterior third, striae distinctly impressed, finely punctate, intervals weakly convex, finely and densely punctate, punctures concentrated along striae, elytra with dense, long erect setae, minute setae absent; epipleural margin robust, ending at strongly rounded external apical angle of elytra, sparsely setose; apex of elytra with a fine membraneous rim of short microtrichomes.

Ventral face coarsely and densely punctate, only metasternal plate and lateral metacoxa with a few long setae. Mesosternum between mesocoxae as wide as mesofemur. Ratio of length of metepisternum/ metacoxa: 1/ 1.5. Abdominal sternites finely and moderately densely punctate, each with a row of coarse punctures bearing each a robust seta, otherwise glabrous. Pygidium moderately convex, finely and densely punctate, with dense, long setae.

Legs long and narrow, shiny; femora finely and sparsely punctate, with two longitudinal rows of setae. Metafemur with anterior margin acute, without adjacent serrated line; posterior ventral margin almost straight, weakly widened in apical half, ventrally and dorsally not serrated, sparsely setose. Metatibia long and narrow, widest at apex, ratio width/ length: 1/ 4.76, sharply carinate dorsally, with four groups of spines, basal one at first quarter, second one at middle, third one at two thrids, apical one at four fifths of metatibial length, basally glabrous; lateral face longitudinally convex, finely and irregularly densely punctate, glabrous; apex concavely and narrowly sinuate interiorly near tarsal articulation. Tarsomeres finely punctate dorsally, with moderately dense, fine setae ventrally; metatarsomeres ventrally with a strongly serrated carina, subventrally with a second, smooth longitudinal carina; first metatarsomere little shorter than following two tarsomeres combined and as long as dorsal tibial spur. Protibia long, bidentate; anterior claws symmetric, interior tarsal claws sharply pointed.

Aedeagus: Fig. 5I–K . Habitus: 5L.

Diagnosis. Serica longipes Ahrens, Fabrizi & Liu , new species differs from S. guangnanensis Ahrens, Fabrizi & Liu , new species by the densely and erectly setose dorsal body surface, the more slender metatibiae, and the shape of parameres, which are shorter and in lateral view almost straight.

Etymology. The name of the new species (adjective in nominative case) is derived from the Latin combined words ‘ long ’ (i.e., long) and ‘ pes ’ (feed/ leg), with reference on the long legs of the species.

Variation. Length: 9.0– 9.8 mm, elytral length: 6.5–8.2 mm, width: 4.4–5.2 mm. Female: antennal club short, as long as remaining antennomeres combined; pygidium weakly convex; eyes much smaller than in male, ratio diameter/ interocular width: 0.55.

Figures

FIGURE 5. A–D: Serica lupina Arrow, 1946 (paratype); E–H: S. guangnanensis Ahrens, Fabrizi & Liu, new species (holotype); I–L: S. longipes Ahrens, Fabrizi & Liu, new species (holotype). A, E, I: Aedeagus, left side lateral view; C, G, K: Aedeagus, right side lateral view; B, F, J: Parameres, dorsal view; D, G, L: Habitus (not to scale). Scale: 0.5 mm.

FIGURE 22. Distribution of Serica allolongipes Ahrens, Fabrizi & Liu, new species, S. gaoligong, S. guangnanensis Ahrens, Fabrizi & Liu, new species, S. klapperichi Frey, 1972, S. longipes Ahrens, Fabrizi & Liu, new species, S. nanhua Ahrens, Fabrizi & Liu, new species, S. longula Frey, 1972, S. lupina Arrow, 1946, S. shiduensis Ahrens, Fabrizi & Liu, new species; “?” repre- sents the non-localized occurrence of S. yini Ahrens, Fabrizi & Liu, new species in Myanmar .