Serica longwang 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 : 12-13

Serica longwang Ahrens, Fabrizi & Liu , new species

Figures 1I–M , 21

Type material examined. Holotype: ♂ “ China: Zhejiang, Anji County Longwang Shan, parking square to Dianmufeng, 30°23’59’’N, 119°26’26’’E, 1300-1450m, 14.v.2013, C.-C. Dai & X.-B. Song leg./ 1107 Asia Sericini spec. ” ( SNUC) . Paratype: 1 ♂ “ China: S. Zhejiang, Qingyuan Mt. nr. Liyang village , 27°49’38’’N, 119°11’22’’E, leaf litter, sifted, 29.iv.2014 990-1160m, Peng, Song, Yan & Yu leg.” ( ZFMK) .

Description of the holotype. Length: 9.2 mm, length of elytra: 7.2 mm, width: 5.4 mm. Body elongate, dorsal and ventral face yellowish brown, dorsal face shiny and glabrous, antenna yellow.

Labroclypeus subtrapezoidal, little wider than long, widest at base, lateral margins convex and convergent to moderately rounded anterior angles, lateral margin and ocular canthus producing a blunt angle, margins moderately reflexed; anterior margin distinctly emarginate medially; surface convex, coarsely and densely punctate, with a few long, erect setae anteriorly; frontoclypeal suture weakly impressed and angled medially; smooth area in front of eye approximately twice as wide as long; ocular canthus moderately long and narrow (1/3 of ocular diameter), coarsely densely punctate, with a terminal seta. Frons with fine, dense punctures, completely shiny, glabrous except for a few setae beside eyes. Eyes moderately large, ratio of diameter/interocular width: 0.68.Antenna composed of 9 antennomeres, club with three antennomeres, strongly reflexed, three times as long as remaining antennomeres combined. Mentum anteriorly elevated and flattened.

Pronotum transverse and subtrapezoidal, widest at base, lateral margins in basal two thirds straight and weakly convergent anteriorly, anteriorly more convex; anterior angles moderately produced and rectangular, strongly rounded in the tip; posterior angles blunt; anterior margin convex, robust marginal line complete medially; basal margin without marginal line; surface coarsely and densely punctate, glabrous; anterior and lateral margins with short sparse setae. Scutellum wide, triangular, with fine and dense punctures, glabrous, basal midline impunctate.

Elytra oblong, widest at posterior quarter, striae distinctly impressed, finely and densely punctate; intervals weakly convex, with fine, moderately dense punctures concentrated along striae; intervals glabrous; epipleural margin robust, ending at strongly rounded external apical angle of elytra, epipleura sparsely setose; apical border chitinous, without a rim of microtrichomes.

Ventral surface dull, metasternal disc and abdominal sternites except the last one shiny; metasternum and metacoxa with large and dense punctures, almost completely glabrous; metacoxa with several long setae laterally. Abdominal sternites, in addition to generally distributed fine and moderately dense punctures, each with a distinct transverse row of coarse punctures each bearing a short and robust seta, otherwise glabrous; ultimate sternite with a few long additional setae. Mesosternum between mesocoxae narrower than mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.12. Pygidium moderately convex, yellow shiny, with fine, moderately dense punctures, along the apical margin dull and with a few short setae.

Legs moderately wide and long; femora with two longitudinal rows of setae, finely and moderately densely punctate; metafemur shiny, anterior margin acute, lacking an adjacent serrated line, posterior ventral margin straight, not widened in apical half, entirely serrate, dorsal margin also serrate, finely setose. Metatibia moderately wide and long, widest at apex, ratio width/length: 1/3.8, dorsally sharply carinate, with only one distal group of spines, basal one reduced to a single robust seta at the middle of metatibial length, apical one at four fifths of metatibial length; in basal half with a short fine spines in row; lateral face longitudinally convex, with a few sparse and coarse punctures, glabrous; ventral margin serrate, with three long setae of which distal two are more distant; medial face coarsely densely punctate and slightly rugose, glabrous; apex interiorly near tarsal articulation bluntly truncate. Tarsomeres irregularly sparsely and finely coarsely punctate dorsally, ventrally with sparse, short setae; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina; metatarsomeres ventrally glabrous, first metatarsomere little longer than following tarsomere and little longer then dorsal tibial spur. Protibia moderately long, bidentate. All claws symmetrical, feebly curved and long, with sharply pointed basal tooth.

Aedeagus: Fig. 1I–L . Habitus: Fig. 1M . Female unknown.

Diagnosis. Serica longwang Ahrens, Fabrizi & Liu , new species differs from the very similar Serica longula Frey, 1972 and all other species of the Serica sensu lato assemblage by the lacking membraneous border of apical elytra, the competely shiny surface, shape of aedeagus: both parameres possess large basal lobes.

Etymology. The name of the new species, Longwang (noun in apposition), is derived from its type locality Longwang Shan.

Variation. Length: 9.0– 9.2 mm, length of elytra: 6.6–7.2 mm, width: 4.6–5.4 mm.

Figures

FIGURE 1. A–D: Serica longula Frey, 1972 (Kuatun, Fukien); E–H: S. tiammushan Ahrens, Fabrizi & Liu, new species (holotype); I–M: S. longwan Ahrens, Fabrizi & Liu, new species (holotype). A, E, I: Aedeagus, left side lateral view; C, G, L: Aedeagus, right side lateral view; B, F, K: Parameres, dorsal view; J: aedeagus, dorsal view; D, H, M: Habitus (not to scale). Scale: 0.5 mm.

FIGURE 21. Distribution of Serica adspersa Frey, 1972, S. daqiaoana Ahrens, Fabrizi & Liu, new species, S. dissimillima Ahrens, Fabrizi & Liu, new species, S. jiankouensis Ahrens, Fabrizi & Liu, new species, S. longwang Ahrens, Fabrizi & Liu, new species, S. mensonana Ahrens, Fabrizi & Liu, new species, S. solivaga Brenske, 1898, S. tianmushan Ahrens, Fabrizi & Liu, new species .