Bambusiphaga nigrigena, Chen & Yang, 2023

Li, Hong-Xing, Chen, Xiang-Sheng & Yang, Lin, 2023, Three new species of the bamboo-feeding planthopper genus Bambusiphaga Huang & Ding from China (Hemiptera: Fulgoroidea: Delphacidae), European Journal of Taxonomy 875, pp. 142-158 : 152-156

Bambusiphaga nigrigena sp. nov.

urn:lsid:zoobank.org:act:64E81E1C-8DA9-4860-9A54-70754D78F966

Figs 5–7

Diagnosis

Bambusiphaga nigrigena sp. nov. can be distinguished from the remaining species of the genus by having the vertex without any markings, the pronotum with dark brown markings on lateral areas, the mesonotum with dark brown markings, the forewings with a large black marking at the base, the anal segment with a long ventral process medially, and the pygofer without a medioventral process.

Etymology

The specific epithet is derived from a combination of the Latin root prefix ‘ nigr- ’ and ‘ gena ’, referring to the ‘genae’ being dark brown.

Type material

Holotype

CHINA • ♂; Yunnan, Menghai County; 21°91′ N, 100°44′ E; 23 Jul. 2019; H.X. Li, S.Y. Xu and N. Gong leg.; on bamboo; GUGU-DE-BA-20190701 .

Paratypes

CHINA • 7 ♂♂, 2 ♀♀; same collection data as for holotype; GUGU-DE-BA-20190702 to GUGU-DE-BA-20190710 • 5 ♂♂, 3 ♀♀; Yunnan, Ruili County; 24°05′ N, 97°96′ E; 21 Aug. 2016; L. Yang and X.S. Chen leg.; on bamboo; GUGU-DE-BA-20190711 to GUGU-DE-BA-20190718 • 6 ♂♂, 5 ♀♀; Yunnan, Mengla County; 21°93′ N, 101°26′ E; 30 Aug. 2017; Q. Luo and Z.X. Zhou leg.; on bamboo; GUGU-DE-BA-20190719 to GUGU-DE-BA-20190729 • 9 ♂♂, 6 ♀♀; Yunnan, Mengla County; 21°93′ N, 101°25′ E; 11 Aug. 2018; J.K. Long and X.S. Chen leg.; on bamboo; GUGU-DE-BA-20190730 to GUGU-DE-BA-20190744 • 27 ♂♂, 14 ♀♀; Yunnan, Ruili County; 24°07′ N, 97°82′ E; 23 Aug. 2018; H.X. Li, N. Gong, F.E. Li and Q. Luo leg.; on bamboo; GUGU-DE-BA-20190745 to GUGU-DE-BA-20190785 • 3 ♂♂, 1 ♀; Yunnan, Jinghong County; 21°57′ N, 100°67′ E; 17 Jul. 2019; H.X. Li, N. Gong, F.E. Li and S.Y. Xue leg.; on bamboo; GUGU-DE-BA-20190786 to GUGU-DE-BA-20190789 • 1 ♂; Yunnan, Mengla County; 21°21′ N, 101°71′ E; 18 Jul. 2019; H.X. Li leg.; on bamboo; GUGU-DE-BA-20190790 .

Description

MEASUREMENTS. Body length including forewing: male 3.2–3.5 mm (N = 10), female: 3.4–3.8 mm (N = 10).

COLORATION. General color yellowish white to yellowish brown, with dark brown markings ( Fig. 5 ). Vertex, frons, rostrum and antennae lightly yellowish white. Genae dark brown. Clypeus ( Fig. 5E ) yellowish white, anteclypeus and lateral sides of postclypeus dark brown. Eyes and ocelli reddish brown. Pronotum ( Fig. 5C ) dark brown, central areas of lateral carinae mostly yellowish white. Mesonotum ( Fig. 5C ) yellow to dark brown, apex of scutellum yellowish white. Forewings ( Fig. 5F ) pale yellowish white, almost hyaline, with large dark brown marking at basal area. Legs ( Fig. 5D–E ) yellowish white, except femora of fore legs and median legs dark brown. Abdomen dark brown, except posterior margin of each segment yellowish brown.

HEAD AND THORAX. Vertex ( Figs 5C , 6A ) at midline shorter than wide at base (1:1.84), width at apex narrower than at base (1:1.84), anterior margin truncate, lateral and submedian carinae distinct, median carina indistinct. Frons ( Figs 5E , 6B ) in middle line longer than wide, at widest part about 2.56: 1, widest at apex, median carina simple. Base of postclypeus ( Figs 5E , 6B ) as wide apex of frons. Antennae ( Figs 5E , 6B ) with basal segment 1.15 × as long as wide, shorter than second segment (1: 1.90). Pronotum ( Figs 5C , 6A ) longer than vertex medially (1.16: 1). Mesonotum ( Figs 5C , 6A ) 2.28 × as long as vertex and pronotum together in middle line. Forewings ( Fig. 5F ) longer in middle line than broad at widest part (2.70:1), transverse venation located in middle near base.

MALE GENITALIA. Anal segment ( Fig. 6C, F ) ring-like, with a long ventral process medially. Pygofer ( Fig. 6C–D ) in profile with dorsal margin shorter than ventral margin, posterior margin slightly sinuate; opening in posterior view longer than wide, ventral margin broadly concave, without medioventral process. Genital styles ( Fig. 6G–H ) in posterior view very long and narrow, lateral margins subparallel, tapering apically, slightly divergent apically; in profile arched medially. Aedeagus without phyllobase. Phallus ( Fig. 6I ) stout, strongly curved dorsally at basal ⅓, thin and slightly curved ventrally at apical ⅓.

Host plant

Bambusoideae.

Distribution

China (Yunnan).

Remarks

This new species is similar to B. maculata Chen & Li, 2000 in general appearance, but differs in the following: (1) genae, anteclypeus and lateral sides of postclypeus ( Fig. 5E ) dark brown (vs genae and clypeus (Chen & Li 2000: fig. 2) pale yellowish white in B. maculata ); (2) anal segment of male ( Fig. 6C ) with a ventral process medially (vs anal segment of male (Chen & Li 2000: fig. 4) with a ventral process laterally on left side in B. maculata ); (3) pygofer ( Fig. 6C ) without medioventral process (vs pygofer (Chen and Li 2000: fig. 8) with medioventral process developed in B. maculata ); (4) genital styles ( Fig. 6G ) with apex not forked (vs genital styles (Chen & Li 2000: fig. 7) with apex forked in B. maculata ).

This new species is also similar to B. kunmingensis Yang & Chen, 2011 in general appearance, but differs in the following: (1) forewings ( Fig. 5F ) with a hyaline macula at basal ⅓ (vs forewings ( Yang & Chen 2011: fig. 3) with entire basal ⅓ dark brown in B. kunmingensis ); (2) anal segment of male ( Fig. 6C, F ) with a long ventral process medially (vs ventral margin of anal segment ( Yang & Chen 2011: fig. 6) without a process in B. kunmingensis ); (3) genital styles ( Fig. 6G ) without a process (vs inner margin of genital styles ( Yang & Chen 2011: fig. 8) with an angular process near apical ¼ in B. kunmingensis ); (4) aedeagus ( Fig. 6I ) without phyllobase (vs aedeagus ( Yang & Chen 2011: fig. 10) with phyllobase in B. kunmingensis ).

Figures

Fig. 5. Bambusiphaga nigrigena sp. nov., ♂., holotype (GUGU-DE-BA-20190701). A. Male adult, dorsal view. B. Male adult, lateral view. C. Head and thorax, dorsal view. D. Head and thorax, lateral view. E. Face. F. Forewing. Scale bars = 0.5 mm.

Fig. 6. Bambusiphaga nigrigena sp. nov., ♂., holotype (GUGU-DE-BA-20190701). A. Head and thorax, dorsal view. B. Face. C. Male genitalia, posterior view. D. Male genitalia, lateral view. E. Anal segment, aedeagus and genital style, lateral view. F. Anal segment, dorsal view. G. Genital style, posterior view. H. Genital style, lateral view. I. Aedeagus, lateral view. Scale bars: A–B = 0.5 mm; C–I = 0.2 mm.

Fig. 7. Adult of Bambusiphaga nigrigena sp. nov. resting on leaf of bamboo. Photograph by X.S. Chen.