Aoyuanus spathulus, Zhou, Zheng-Xiang, Yang, Lin & Chen, Xiang-Sheng, 2019

Zhou, Zheng-Xiang, Yang, Lin & Chen, Xiang-Sheng, 2019, Taxonomic study of the genus Aoyuanus Ding & Chen, with descriptions of two new species (Hemiptera, Fulgoromorpha, Delphacidae), ZooKeys 822, pp. 53-65 : 55-59

Aoyuanus spathulus sp. n. Figs 20-28, 29-39

Type material.

Holotype: ♂, China: Yunnan, Simao County, Caiyanghe (22°56'N, 101°20'E), 23 Aug 2014, Z-X Zhou. Paratypes: 2♂♂, same data as holotype.

Type locality.

China: Yunnan, Simao County, Caiyanghe (22°56'N, 101°20'E), 1368 m.

Measurements

(n = 3). Body length (from apex of vertex to apex of forewing): male 1.90-2.00 mm; forewing length: male 0.80-0.87 mm.

Diagnosis.

Forewings with brown marking at apex (Figs 20, 21). Aedeagus forked at approximately basal one-third, with dorsal one broad, flat and rounded at apex (Figs 34, 35). Anal segment with two processes at laterocaudal margins, broad and large, broadened at apex (Figs 32, 33).

Description.

Coloration. General color yellowish white to dark brown (Figs 20, 21, 23-25). Head yellowish white to yellowish brown (Figs 23-25). Vertex yellowish white (Fig. 23). Frons black-brown, except middle carina and lateral margins yellow (Fig. 24). Clypeus yellowish brown (Fig. 24). Rostrum yellowish brown, with apex brown. Genae yellowish brown (Figs 24, 25). Eyes generally yellowish brown (Figs 20, 21, 23-25); ocellus yellow (Fig. 25). Antennae with first segment yellowish brown and black at apex and with second segment yellow (Fig. 24). Pronotum and mesonotum yellow, except carinae yellowish white (Fig. 23). Forewings with brown marking at apex (Figs 20, 21). Legs yellowish white to yellowish brown, tibiae yellow and yellowish brown basally, tarsomeres yellow (Figs 20, 21). Abdomen black, except lateral margins and middorsum with pale markings and segments 7-9 pale dorsally (Figs 20, 21).

Structure. Head and thorax. Head including eyes narrower than pronotum, ratio 0.98:1 (Figs 23, 26). Vertex with lateral carinae slightly concave, shorter submedially than wide at base, ratio 0.76:1, narrower at apex than at base, ratio 0.90:1 (Figs 23, 26). Frons longer in middle line than wide at widest part, ratio 1.77:1 (Figs 24, 27). Postclypeus wider at base than frons at apex, slightly longer than wide at base (Figs 24, 27). Antennae with basal segment as long as wide, shorter than second, ratio 0.45:1 (Figs 24, 27). Pronotum longer than vertex, ratio 1.06:1 (Figs 23, 26). Mesonotum shorter than pronotum and vertex combined, ratio 0.81:1 (Figs 23, 26). Posttibial spur with 16-20 distinct teeth along hind margin. Brachypterous forewings distinctly not reaching apex of abdomen, longer than widest part, ratio 1.76:1, widest at middle (Fig. 22).

Male genitalia. Pygofer with a medioventral process (Figs 29-31). Aedeagus forked in approximately basal one-third and dorsal one broad and flat, rounded at apex (Figs 34, 35). Parameres small, with apical half-turned mesad (Figs 36-38). Suspensorium Y-shaped, with arms as long as stem (Fig. 39). Anal segment with two processes at laterocaudal margins, large, broadened at apex (Figs 32, 33).

Reported hosts.

None.

Distribution.

China (Yunnan).

Etymology.

The specific name is derived from the Latin word spathulus (narrow and flattened), referring to the male anal segment with two spatulate processes.

Remarks.

The new species is similar to Aoyuanus furcatus Ding & Chen, 2001 in the shape of the aedeagus, but can be easily distinguished from the latter by the male anal segment with processes (without processes in A. furcatus ); and the pygofer with a medioventral process (with three processes in A. furcatus ). This new species is also extremely similar to Aoyuanus varius sp. n. in the shape of aedeagus, but can be easily distinguished from the latter by the anal segment with lateroapical angles symmetrical (anal segment with lateroapical angles asymmetrical in A. varius sp. n.); pygofer with one medioventral process not forked at apex (pygofer with medioventral process forked at apex in A. varius sp. n.); suspensorium Y-shaped, with arms as long as stem (suspensorium with stem longer than arms in A. varius sp. n.).