Philagra fuscofasciata, Liang, 2022

Liang, Ai-Ping, 2022, Three new species of the genus Philagra Stål (Hemiptera: Cercopidea: Aphrophoridae) from China and Bangladesh, Zootaxa 5200 (2), pp. 169-180 : 175-176

publication ID	https://doi.org/ 10.11646/zootaxa.5200.2.4
publication LSID	lsid:zoobank.org:pub:EE8E2630-181F-49CC-9A0D-02C0F72E6087
DOI	https://doi.org/10.5281/zenodo.7256840
persistent identifier	https://treatment.plazi.org/id/CB54EB2D-0646-365D-1AFC-FCCD1445FCE5
treatment provided by	Plazi
scientific name	Philagra fuscofasciata
status

Treatment

Philagra fuscofasciata s p. nov.

( Figs 1B View FIGURE 1 , 5–6 View FIGURE 5 View FIGURE 6 )

Diagnosis. This new species can be easily distinguished from other Philagra species by its relatively large size and robust body; elongate, broad and flat cephalic process without dorsal and ventral median carinae; presence of a central, longitudinal, fuscous fascia on the dorsum of the cephalic process, pronotum, scutellum and inner margin of forewings; forewings speckled with short and fine fuscous stripes, and corium with one distinct, nearly rectangular, fuscous marking before the middle ( Figs 1B View FIGURE 1 , 5 View FIGURE 5 ); and the structure of the male genitalia ( Fig. 6 View FIGURE 6 ).

Description. Relatively large, robust species, body length: ♂ 17.6 mm, ♀ 19.8–19.9 mm, length of cephalic process: ♂ 4.3 mm, ♀ 4.8 mm ( Figs 1B View FIGURE 1 , 5 View FIGURE 5 ).

Body dark brown, strongly silverishly piolose, with a central, continuous, longitudinal, fuscous fascia on dorsum of cephalic process, pronotum, scutellum and inner margins of forewings ( Figs 1B View FIGURE 1 , 5 View FIGURE 5 ). Body beneath dark brown, lateral margin of cephalic process, frons and propleurae lacking yellowish V-shaped vitta in lateroventral view ( Fig. 5C View FIGURE 5 ). Antennae brown, pedicel with apex suffused with fuscous; antennal ledges centrally yellowish in lateral view. Rostrum brown, with apical segment (excluding extreme base) fuscous. Pronotum with a very short and fine yellowish stripe on base, anterior lateral margin yellowish in lateral view. Thorax beneath brown. Scutellum with apex centrally yellowish. Forewing speckled with short and fine fuscous stripes; corium with one distinct, nearly rectangular, fuscous marking before middle ( Fig. 5C View FIGURE 5 ). Legs brown, with tarsomere III much darker, claws blackish, tips of spines on lateral outer edge of hind tibia and tips of spines at end of hind tibia and metatarsomeres I and II, black. Abdomen with dorsum yellowish brown and sternum dark brown. Male genital capsule yellowish brown, subgenital plates suffused with brownish; anal segments and anal tube dark brown.

Cephalic process elongate, distinctly longer than pronotum, with extreme apex slightly expanded laterally and compressed dorsoventrally; relatively broad, flat and robust in dorsal view, relatively straight and gently extending anterodorsally in lateral view ( Figs 1B View FIGURE 1 , 5 View FIGURE 5 ), without dorsal and ventral median carina ( Fig. 5 View FIGURE 5 ). Antenna with flagellum segmented by scar-shaped rings, with two peg-like basiconic sensilla and more than ten coeloconic sensilla on surface of expanded flagellar base. Legs relatively short and stout, apical tibial spines stout; metatarsomere II bilobed apically with outer lobe distinctly long, longer than inner lobe. Forewing strongly silverishly piolose.

Male genitalia with pygofer short and high, with posterior margin angularly extending posteriorly mesially in lateral view ( Fig. 6A View FIGURE 6 ); anal tube slender in lateral view ( Figs 6A, 6B View FIGURE 6 ). Subgenital plates elongate ( Figs 6A–D View FIGURE 6 ), with outer margin sinuate in ventral view ( Fig. 6B View FIGURE 6 ) and strongly excavated over apical one fourth leaving apical part of the plate rod-like; extreme apex bidentate ( Figs 6C, 6D View FIGURE 6 ), curving dorsoanteriorly in ventrolateral view ( Fig. 6D View FIGURE 6 ). Genital style ( Figs 6A, 6E, 6F, 6G View FIGURE 6 ) relatively broad with extreme basal part slender and laminate; upper margin greatly excavated over apical one fourth leaving apical one fourth narrow and slender in lateral view, with extreme apex of apical slender part forked, with inner edge of apical part of style with a dorsally directed, laminate process in lateral view ( Figs 6E, 6F View FIGURE 6 ). Aedeagal shaft ( Figs 6A, 6E–G View FIGURE 6 ) tubular, slender, nearly straight, base expanded posteroventrally and nearly knob-like, with apical spines distinctly narrow, slender and acute; gonopore subapical dorsally.

Remarks. This new species is similar to P. subrecta Jacobi 1921 from China but can be distinguished from the latter by the much larger body, the presence of a central longitudinal fuscous fascia starting from apex of cephalic process, running along with median line of pronotum and scutellum, and ending at tip of inner margin of forewings ( Fig. 5 View FIGURE 5 ); and the details of the male genitalia ( Fig. 6 View FIGURE 6 ).

The unique female specimen collected from Mt. Emei in Sichuan Province, China, and tentatively included in this species, lacks the fuscous marking on the corium before the middle ( Fig. 1B View FIGURE 1 ).

Distribution. Sothwestern China (Guizhou, Sichuan).

Etymology. The name of this new species is derived from the Latin words “ fuscus (dark brown)” and “ fascia (band)”, referring to the presence of a longitudinal fuscous fascia runnin from apex of the cephalic process to tip of the inner margin of forewings ( Figs 1B View FIGURE 1 , 5 View FIGURE 5 ).

Type specimens examined. Holotype ♂, CHINA: Guizhou Province: Jiangkou County, Taiping Town, Kaima village , 540 m, spreading, 27.8427º N, 108.7749º E, 2.viii.2014 (X.J. Peng et al.) ( TJNU) GoogleMaps . Paratypes. CHINA: Guizhou Province: 2♀♀, same data as holotype ( TJNU) GoogleMaps .

Other specimen examined. CHINA: Sichuan Province: 1♀, Mt. Emei, Jiulaodong , 1800–1900 m, 6.vii.1957 (F.X. Zhu) ( IZCAS) .