Platylomia jini Wang, 2024

Wang, Cheng-Bin, 2024, Contribution to the knowledge of the genus Platylomia Stål (Hemiptera, Cicadidae, Cicadinae) in China with description of a new species, Journal of Insect Biodiversity and Systematics 10 (4), pp. 983-993 : 985-987

Platylomia jini Wang sp. nov. ( Figs 1A–C; 2A–F; 3A–C) [ Chinese common name : DZṳü]

https://zoobank.org/ urn:lsid:zoobank.org:act:D1B172DC-B124-497F-8B75-B449A038C402

Type material. 8♂♂. Holotype ♂, CHINA, Yunnan: Diqing Prefecture, Weixi County, Weideng Township , Xinnong Country [ũt村], 1800 m, 24. V .2022, Xue-Zhou Li [李‡ª] leg. ( MYNU) . Paratypes: 4♂♂, same data as holotype (1♂ in MYNU and 3♂♂ in cJZZ) ; 3♂♂, CHINA, Yunnan: Nujiang Prefecture, Fugong County, Maji Township , Bushishuilidishan [不‖水¶底山], 10–13. V .2023, Xin-Fa Yu [余ũ发] leg. (cLFW) .

Etymology. The new species is dedicated to Mr. Jin Zhang [张DZ] (Zhangjiakou, China), a Chinese amateur, for his help in my taxonomic study of Cicadidae . The name is a noun in the genitive case.

Differential diagnosis. Platylomia jini Wang sp. nov. shares with P. shaanxiensis Wang & Wei, 2014 the following characteristics which in combination can be distinguished them from other congeners: infuscations distinctly present on r, r-m, m and m-cu crossveins, as well as on apices of longitudinal veins of apical cells; male opercula not reaching sternite VIII; male opercula with outer margin straight; abdomen generally black on dorsum. However, it is easily to differentiate the new species from the latter ( Wang & Wei, 2014: fig. 1) by the combination of the following characteristics ( P. shaanxiensis in brackets): anteclypeus black, with a “T”-shaped brownish fascia along midline and basal margin (entirely black); pronotum with submedian fasciae extending across pronotal collar to posterior margin (not extending across pronotal collar), and a pair of small center spots on lateral angles of pronotal collar (a pair of fasciae along lateral angle margins of pronotal collar); mesonotum with median fascia rather wide, dramatically broadened posteriorly, occupying scutal depressions (relatively narrow and a pair of large spots on scutal depressions), and accessory fasciae not joining lateral fasciae posteriorly (joining lateral fasciae posteriorly); cruciform elevation with black median fascia extending to posterior arms and paired black markings on anterior arms (without black median fascia, only with paired black markings on anterior arms); profemur with primary spine prostrating, with apex rounded (oblique, with apex pointed); tergite 2 with one small, ill-defined, brownish median spot (with three large, distinct, reddish brown medial spots); apex of operculum reaching posterior margin of sternite VI (reaching posterior margin of sternite V); uncus slender, without constrictions, slightly curving medially at apices and slightly curving outwards at apices in lateral view (broad, with constrictions at about apical 1/4, slightly curving laterally at apices and slightly curving inwards at apices in lateral view); aedeagus slender but short, strongly thinned in apical 1/3, and almost straight except base in lateral view (slender and long, tapering apically, and extremely sinuate in lateral view).

Description. Male ( Fig. 1A & B). Measurements (mm, n = 6). Body (40.8; 39.0–43.1) long. Lengths of different body parts (holotype; range): head (3.0; 2.8–3.6), pronotum (5.0; 4.6–5.4), mesonotum (8.9; 8.6– 9.5), forewing (49.8; 48.2–51.3), abdomen (23.4; 23.0–24.6); width: head (12.1; 11.9–12.7), pronotum (13.8; 13.4–15.0), mesonotum (10.5; 10.2–10.8), forewing (14.8; 14.5–15.7); tergite III (14.0; 13.8–14.7). Ratios of different body parts: (body length)/(head width) = 3.4; (pronotal length)/(head length) = 1.6; (mesonotal length excluding cruciform elevation)/(pronotal length) = 1.4; (abdominal length)/(head + pronotal + mesonotal length) = 1.4; (head width)/(pronotal width) = 0.9; (head width)/(mesonotal width) = 1.2; (tergite III width)/(mesonotal width) = 1.3; (forewing length)/(forewing width) = 3.4.

Head. With ground colour brownish, with following black markings occupying most of head: longitudinal median fascia rather broad, enclosing three ocelli, reaching frontoclypeal suture and posterior margin of head, lateral parts extending posteriorly and longitudinally into slender but short stripes, and joining lateral fasciae in anterior half; lateral fasciae rather broad, almost occupying entire area between median fascia and eyes, except not reaching anterolateral margins of head, reaching posterior margin of head but emarginate medially. Compound eyes brown. Ocelli brownish to brown. Distance between lateral ocellus and corresponding eye about 2.5 times as wide as distance between lateral ocelli. Antennae blackish. Postclypeus moderately swollen, black, with paired brownish submedian spots just anterior to frontoclypeal suture, a short brownish median fascia anterodorsally, with 14–15 brownish transverse grooves on each side. Anteclypeus black, with a “T”-shaped brownish fascia along midline and basal margin. Genae black in posterior part and ochraceous anteriorly. Lorum black except anterior end. Rostrum ochraceous with blackish apical part, just reaching posterior margins of metacoxae.

Thorax. Pronotum brownish at pronotal disc, and pronotal collar ochraceous in lateral angles and lateral parts, brownish in dorsal part, with following black markings: submedian fasciae long, extending from anterior margin of pronotum across pronotal collar to posterior margin, strongly broadened at both anterior and posterior ends; paired oblique fasciae along paramedian fissures; paired oblique fasciae extending from middle parts of paramedian fissures, joining posterior parts of lateral fissures, and across pronotal collar to posterior margin; paired oblique fasciae along lateral fissures; fascia along ambient fissure; paired small center spots on lateral angles of pronotal collar. Pronotal collar with median length short, about 0.2 times as long as pronotum disc, moderately ampliate posterolaterally; lateral margins with obtuse lateral teeth at about anterior 1/3, orientating laterally; lateral angles widely rounded; surface transversely grooved. Mesonotum brownish, with following black markings: median fascia rather wide, dramatically broadened posteriorly, occupying scutal depressions, with apex reaching anterior margin of cruciform elevation; submedian fasciae wide, along parapsidal sutures, broadened posteriorly, joining median fascia; accessory fasciae short, slender, between submedian and lateral fasciae, not joining lateral fasciae posteriorly; lateral fasciae wide, along lateral sigillae, extending to posterior margin of mesonotum, and joining marginal fasciae; marginal fasciae broadened posteriorly, along apical half of mesonotal lateral margins. Cruciform elevation brownish, with black median fascia extending to posterior arms and paired black markings on anterior arms. Wing groove ochraceous, with oblique black fasciae in middle part and black outer margin. Thoracic sternites ochraceous, with short setae.

Legs. Bicoloured, ochraceous to brown with black markings. Profemur ( Fig. 1C) with four spines: primary spine slender, digitiform, prostrate, with apex rounded; secondary spine subtrianglular and rather sharp; subapical spine small, slightly angled; apical spine rather small and tuberculate. Meracanthi mostly blackish with ochraceous margins, elongated triangular and slightly curving medially.

Wings. Hyaline. Forewing with 8 apical cells; ulnar cell 3 about 1.8 times as long as apical cell 5; RA 2 vein with distal portion about 1.9 times as long as proximal portion; venation generally brownish, C and R+Sc veins ochraceous; infuscations distinctly present on r, r-m, m and m-cu crossveins, and paler on apices of longitudinal veins of apical cells; nodal line absent; basal cell greyish ochraceous; basal membrane greyish ochraceous and slightly tinged with greenish. Hind-wing with 6 apical cells; venation generally brownish, C, Sc+RA, CuA and 1A veins ochraceous; jugum and longitudinal margins of vannus greyish ochraceous.

Operculum. Entirely ochraceous; leaf-shaped, with apex subrounded, reaching posterior margin of sternite VI; narrowly separated from each other medially.

Abdomen. Obconical. Tergites generally black, with one small, brownish, ill-defined median spot on tergites 2, 3 and 8; tergites 3–7 with posterior margins narrowly brownish. Timbal cover scalelike, black, densely covered with greyish hairs in lateral half, concealing timbal in dorsal view. Sternites III– VII mostly black; sternites III–VI with large, ochraceous, median patches; sternite VII ochraceous along posterior margin, subtrapezoidal, slightly emarginate in middle of posterior margin; sternite VIII ( Fig. 3A) brownish with blackish oblique fasciae, oblong, slightly emarginate in middle of posterior margin, anterolateral apodemes ill-developed.

Genitalia. Pygofer subcordiform to subelliptical, more or less narrowing posteriorly in ventral and dorsal views ( Fig. 2A, D & F); anal styles relatively large, less sclerotised, densely covered with short setae apically ( Fig. 2A–D, F); apical stylus relatively large and long, lightly sclerotised, digitiform ( Fig. 2D); basal lobes elongate, obliquely prostrating to side walls of pygofer ( Fig. 2A, B); upper lobes absent; distal shoulders widely rounded at apex in lateral view ( Fig. 2C). Uncus slender, lobes separated from each other medially, slightly curving medially at narrowly rounded apices ( Fig. 2A & F) and slightly curving outwards at apices in lateral view ( Fig. 2C). Aedeagus slender but short, strongly thinned in apical 1/3 ( Fig. 3B); in lateral view, almost straight except base ( Fig. 3C).

Variations. Holotype and paratypes without evident variations.

Female. Unknown.

Distribution. China (Yunnan). Species list of Platylomia Stål, 1870 [Alphabetically listed and modified from Sanborn (2013)]