Serica excisa ( Frey, 1972 )

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 : 19-20

Serica excisa ( Frey, 1972)

Figures 3I–L , 23

Trichoserica excisa Frey, 1972: 172 .

Serica excisa: Ahrens 2006b: 245, 2007b: 36 ; Ahrens & Bezděk 2016: 311.

Type material examined. Holotype: ♂ “Kuatun (2300 m) 27,40 n. Br. 117,40 ö. L. J. Klapperich 11.5.1938 (Fukien)/ Type Ophthalmoserica excisa G. Frey 1972 ” ( ZFMK) [aedeagus lost from attached cartoon] . Paratypes: 1 ♀ “Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 11.5.1938 (Fukien)/ Paratype Ophthalmoserica excisa G. Frey 1972 ” ( ZFMK) , 1 ♂ “Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 11.4.1938 (Fukien)/ Paratype Ophthalmoserica excisa G. Frey 1972 ” ( ZFMK [specimen photographed]) , 1 ♂, 1 ♀ “Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 12.5.1938 (Fukien)/ Paratype Ophthalmoserica excisa G. Frey 1972 / Trichoserica excisa ” ( CF) , 1 ♂ “Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 5.5.1938 (Fukien)/ Paratype Ophthalmoserica excisa G. Frey 1972 ” ( ZFMK, CF) , 5 ♂♂ “Kuatun (2300 m) 27, 40 n. Br. 117,40 ö. L. J. Klapperich 11.5.1938 (Fukien)/ Paratype Ophthalmoserica excisa G. Frey 1972 ” ( ZFMK, CF) .

Additional material examined. 1 ex. “ Chine 26.V.46 Kuatun Fukien leg. Tschung-Sen” ( MHNG) , 1 ex. “ Chine 21.IV.46 Kuatun Fukien leg. Tschung-Sen” ( MHNG) , 1 ex. “ Chine 1.VI.46 Kuatun Fukien leg. TschungSen” ( MHNG) , 3 ex. “Kuatun, Fukien China 14.5.46 leg. Tschung-Sen ” ( NMPC) , 1 ex. “Kuatun, Fukien China 15.5.46 leg. Tschung-Sen ” ( NMPC) , 1 ex. “Kuatun, Fukien China 25.5.46 leg. Tschung-Sen ” ( NMPC) , 1 ex. “Kuatun (2300m) 27,40n.Br. 117,40o. L. J. Klapperich 11.4. 1938 ( Fukien )/ ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” ( NMPC) , 1 ex. “Kuatun (2300m) 27,40n.Br. 117,40o. L. J. Klapperich 8.5. 1938 ( Fukien )/ ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” ( NMPC) , 6 ex. “Kuatun (2300m) 27,40n.Br. 117,40o. L. J. Klapperich 11.5. 1938 ( Fukien )/ ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” ( NMPC) , 1 ex. “Kuatun (2300m) 27,40n.Br. 117,40o. L. J. Klapperich 12.5. 1938 ( Fukien )/ ex. Coll. V. Balthasar National Museum Prague, Czech Republic ” ( NMPC) , 1 ex. “Ta-stien-Lou Chasseurs Thibetains 1896/ Museum Paris ex. Coll. R. Oberthur ” ( MHNP) , 1 ♂ “Guanping, Tongmuguan, Chong’an, Fujian, 22.V.1960, 800-900m, leg. Jiang Shengqiao ” ( IZAS) .

Redescription of the holotype. Length: 6.2 mm, length of elytra: 4.5 mm, width: 3.6 mm. Body oval, dorsal face yellow and shiny, head and ventral surface dark brown, shiny, with dense, backwards-bent and moderately long setae, antenna yellow.

Labroclypeus subrectangular, little wider than long, widest at base, lateral margins subparallel in basal half, anteriorly strongly convex and moderately convergent to strongly rounded anterior angles; lateral margin and ocular canthus producing a blunt angle, margins moderately reflexed; anterior margin deeply but narrowly emarginate medially; surface flat, finely and densely punctate, with dense, long, erect setae; frontoclypeal suture weakly impressed and angled medially; smooth area in front of eye approximately twice as wide as long; ocular canthus short and fine (1/4 of ocular diameter), finely densely punctate, with numerous setae. Frons with fine, dense punctures, with dense, long setae directed posteriorly. Eyes large, ratio of diameter/interocular width: 0.83. Antenna composed of 9 antennomeres, club with three antennomeres, strongly reflexed, 2.5 times as long as remaining antennomeres combined. Mentum anteriorly elevated and flattened.

Pronotum subtrapezoidal, widest at base, lateral margins in basal half straight and subparallel, in anterior half strongly convex and convergent anteriorly; anterior angles weakly produced and blunt, well-rounded in the tip; posterior angles blunt; anterior margin weakly convex, marginal line fine but complete; basal margin without marginal line; surface finely and densely punctate, with long, backwards-directed setae mixed with short adpressed ones; anterior and lateral margins with dense setae. Hypomeron carinate, not produced ventrally. Scutellum wide, triangular, with coarse and dense punctures, with short adpressed setae.

Elytra oval, widest at middle, striae distinctly impressed, finely and densely punctate; intervals flat, with fine, dense punctures; intervals with dense, long setae being directed posteriorly; epipleural margin robust, ending before rounded external apical angle of elytra, epipleura densely setose, apical border chitinous, without a rim of microtrichomes.

Ventral surface shiny, metasternum and metacoxa with fine and dense punctures, densely finely setose; metacoxa with fine adpressed setae, except for a several long setae laterally. Mesosternum between mesocoxae narrower than mesofemur. Ratio of length of metepisternum/metacoxa: 1/1.38. 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 with fine dense setae; penultimate sternite apically without distinct chitinous border. Pygidium moderately convex, shiny, with fine, dense punctures and dense, long 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, smooth, dorsal posterior margin also not serrate, finely setose. Metatibia moderately wide and long, widest at apex, ratio width/length: 1/3.4; dorsal margin sharply carinate, with two groups of spines, basal one at one third, apical one two thirds of metatibial length; basally with a few fine setae; lateral face longitudinally convex, with dense and coarse punctures, and moderately long setae in the punctures; ventral margin serrate, with four equidistant robust setae; medial face coarsely but sparsely punctate, glabrous; apex interiorly near tarsal articulation bluntly truncate. Tarsomeres impunctate dorsally, ventrally with sparse, short setae; metatarsomeres with a strongly serrated ridge ventrally and a smooth subventral longitudinal carina, laterally also moderately carinate; first metatarsomere distinctly shorter than following two tarsomeres combined and little longer than dorsal tibial spur. Protibia moderately long, bidentate, external margin bluntly extended medially. All claws symmetrical, feebly curved and long, with normally developed basal tooth.

Aedeagus: Fig. 3I–K . Habitus: Fig. 3L .

Figures

FIGURE 3. A–D: Serica klapperichi Frey, 1972 (holotype); E–H: S. shiduensis Ahrens, Fabrizi & Liu, new species (holotype); I–L: S. excisa Frey, 1972 (paratype). A, E, I: Aedeagus, left side lateral view; C, G, K: Aedeagus, right side lateral view; B, F, J: Parameres, dorsal view; D, H, L: Habitus (not to scale). Scale: 0.5 mm.

FIGURE 23. Distribution of Serica allotengchongana Ahrens, Fabrizi & Liu, new species, S. baishuitaiensis Ahrens, Fabrizi & Liu, new species, S. emaw Ahrens, Fabrizi & Liu, new species, S. excisa Frey, 1972, S. huangbaiyuanensis Ahrens, Fabrizi & Liu, new species, S. paralupina Ahrens, Fabrizi & Liu, new species, S. tengchongana Ahrens, Fabrizi & Liu, new species, S. ventrituberculata Ahrens, Fabrizi & Liu, new species .