Borysthenes pantherinus, Lyu, 2025

Lyu, Tianlang, 2025, Taxonomic notes on the genus Borysthenes Stål, 1866 (Hemiptera: Fulgoromorpha: Borysthenidae), with description of six new species from China, Zootaxa 5665 (1), pp. 67-84 : 75-78

publication ID	https://doi.org/10.11646/zootaxa.5665.1.4
publication LSID	lsid:zoobank.org:pub:AE69B232-FCCA-40CC-B6F7-73EA43D06822
persistent identifier	https://treatment.plazi.org/id/03CECD46-6B58-5D41-FF14-FF2D19A123DF
treatment provided by	Plazi
scientific name	Borysthenes pantherinus
status	sp. nov.

Treatment

Borysthenes pantherinus sp. nov.

Fig. 1E–F View FIGURE 1 , 3A–H View FIGURE 3 , 4F–G View FIGURE 4 , 6C View FIGURE 6

Materials examined: Holotype: ♂, entrance of a cave near Biyange , Yanshan Dist., Guilin, Guangxi Province, China (中国ḞƱIJḦDƜ区ḋǟdzmñAEËƛ口), 4.vi.2023, leg.: Tianlang Lyu.

Paratypes: 1♂ 5♀, same data as holotype .

Diagnosis: This species can be distinguished by the following combined characters: a) body whitish, with dark spotted markings on tegmina, b) tegmina with coastal cell divided by a dark spot in the middle, c) anal segment with lateral lobes, basal width of left lobe less then right lobe, d) aedeagus with 5 processes.

Description. Body length: 7.5mm (male, n=1), 7.7–8.2mm (female, n=3).

Coloration: head and pronotum yellowish white, mesonotum dark brown. Fore and middle legs dark brown, hind leg light brown except darkened apical tibial spines and tarsal spines.Abdomen dark brown. Tegmina generally yellowish white, with scattered dark spots ( Fig. 1G–H View FIGURE 1 , Fig. 6C View FIGURE 6 ). Coastal cell divided by a dark spot in the middle, at the level before nodal line. At the level of nodal line, RP covered by a large dark spot, reaching RA and MP1+2; icua covered by a smaller dark spot, reaching CuA1 and icu, first m-cu light-colored. Further distally, Terminal of RA covered by a large dark spot, reaching coastal margin and RP3+4; second r-m, veinlet between MP1 and MP2, im each covered with a dark spot; second m-cu with each terminal covered with a small dark spot; CuA1 covered with a light brown marking, clouded. Apical margin covered with a crescent light brown marking, clouded.

Structures. Head and thorax: compound eyes well developed. Tegmina with RP and Sc+RA share a common stem, RP with 4 terminals. One examined specimen with MP having 6 terminals. Hindwing with RP bifurcate.

Male genitalia ( Fig. 3A–H View FIGURE 3 ): Pygofer ( Fig. 3G–H View FIGURE 3 ) generally symmetrical. From lateral view, caudal margins of lateral lobes with truncate apex, angulate; around upper angle of apex bearing setae. From ventral view, medioventral process of moderate length, campaniform, apex sharp.

Anal segment ( Fig. 3E View FIGURE 3 ) asymmetrical, somewhat longer than wide. From dorsal view trapezium, caudal margin not emarginate, left lateral margin shorter than right lateral margin. From lateral view, right ventrolateral margin with broader extension than the left one, subrounded.

Aedeagus ( Fig. 3B–D View FIGURE 3 ) with 5 processes. A strong process raised from top left, directing cephalic, slightly curved dorsally and then ventrally. Also, from the left but away from the apex but above the previous described process, a short process directed cephalic. From right side of the apex, two sort processes share a common stem, directed cephalic. Ventrally, away from the apex, a process raised first directed ventrocephalic and then curved leftward and upward, pointing caudally.

Gonosyli ( Fig. 3F View FIGURE 3 ) symmetrical. From lateral view, each apical lobe with a dorsal prominence, from dorsal view apical lobes strongly extended caudally.

Female genitalia ( Fig. 4F–G View FIGURE 4 ): Ovipositor gently curved, thick. Posterior vagina bilaterally widened, with caudal portion of both ventral and dorsal walls strongly sclerotized, structure as shown in Fig. 4G View FIGURE 4 . Bursa copulatrix duct dorsocephalad to vagina. Ductus receptaculi ventrocephalad to vagina, not twisted into a helix.

Remarks: This species is superficially similar to B. delicatus , for their relationship see remarks on the latter.

The male genitalia of this species is also similar to that of B. fatalis Emaljanov (1989) in Vietnam, both having ventral aedeagus process arise slightly away from apex, but can be distinguished from the latter by a) caudal margins of male pygofer lateral lobs with upper slope moderately concave ( B. fatalis with this part of pygofer strongly concave, causing the upper corner of the truncate apex almost a right angle), b) male anal segment trapezium from lateral view, caudal margin without emargination, expansion of ventrolateral margins not folded inward ( B. fatalis has caudal margin of male anal segment strongly emarginate, extension of right ventrolateral margin folded inward), c) aedeagus with 5 sharp processes, no flat ventral projection at the middle of periandrium ( B. fatalis with 4 sharp processes, and a flat ventral projection at the middle of periandrium).

Habitat and behavior: this species is currently only known from the entrance of a karst cave beside the highway in Yanshan Dist., Guilin, Guangxi Province, China. The cave entrance was covered with shade plants ( Fig. 6A View FIGURE 6 ). B. pantherinus was only found near the entrance, dwelling on the rock surface inside the cave ( Fig. 6C View FIGURE 6 ). Almost the same location, on the moss-covered rocks and shade plants at the cave entrance, B. opacus sp. nov. was collected during the same survey.

Distribution: Guangxi (Guilin).

Etymology: The specific epithet comes from the Latin word “ pantherinus ”, indicating “with spots like

Panthera”, referring to the scattered dark spots on tegmina. The epithet is a masculine adjective.