Andixius gracilispinus Wang & Chen, 2023
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publication ID |
https://dx.doi.org/10.3897/zookeys.1141.84564 |
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publication LSID |
lsid:zoobank.org:pub:DDB92C86-E5D6-42B8-9469-A252DC18B9B5 |
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persistent identifier |
https://treatment.plazi.org/id/4CF579B2-3F5B-4926-99D8-59E7F8E16E85 |
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taxon LSID |
lsid:zoobank.org:act:4CF579B2-3F5B-4926-99D8-59E7F8E16E85 |
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treatment provided by |
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scientific name |
Andixius gracilispinus Wang & Chen |
| status |
sp. nov. |
Andixius gracilispinus Wang & Chen sp. nov.
Figs 1C, D View Figure 1 , 4A-C View Figure 4 , 5A-H View Figure 5
Type material.
Holotype: ♂, China: Xizang Province, Bomê County, Yigong Town, Tongmai Village (30.1071°N, 95.0867°E), 18-20 August 2020, Yongjin Sui leg.; Paratypes: ♂, same data as holotype.
Description.
Body length: male 5.63-5.82 mm (n = 2).
Coloration. General color yellowish brown (Figs 1C, D View Figure 1 , 4A, B View Figure 4 ). Eyes black-brown, ocelli faint light yellowish brown, semitranslucent. Lateral margin of frons yellowish brown, behind eyes with an off-white spot. Antenna and vertex yellowish brown. Face and rostrum dark fawn. Pronotum and mesonotum black. Forewing semitranslucent, with veins, stigma, and tubercles black-brown; basal and middle part of forewings with an inner oblique stripe; base and lateral margin black-brown; in front of fork CuA1+CuA2 with a pale spot; costal vein with three small, spaced, dark brown spots; behind stigma and near claval fork with an irregular puce spot; apical half of wing with brown patches. Hind tibiae light brown. Ventral abdomen brown.
Head and thorax. Vertex (Figs 1C View Figure 1 , 4A View Figure 4 ) 1.37 times longer than wide; anterior margin slightly curved, recessed; posterior margin V-shaped, recessed; lateral carinae developed; median carina absent. Frons (Fig. 4 B View Figure 4 ) claviform, 2.85 times as long as wide. Pronotum (Figs 1C View Figure 1 , 4A View Figure 4 ) slightly shorter than vertex. Mesonotum 1.34 times longer than pronotum and vertex combined, lateral carinae curved outwards. Forewing (Figs 1D View Figure 1 , 4C View Figure 4 ) 2.57 times longer than wide, with 11 apical cells and six subapical cells; RP 3 branches, MP with five terminals: MP11, MP12, MP2, MP3, and MP4, fork MP1+MP2 basad of fork MP3+MP4. Hind tibia with five lateral spines; chaetotaxy of hind tarsi 6/6.
Male genitalia. Pygofer (Fig. 5A, C View Figure 5 ) symmetrical. Medioventral process rounded protruding in ventral view. Anal segment (Fig. 5A, D View Figure 5 ) asymmetrical, left lobe larger than right lobe, dorsal margin almost straight, apical margin slightly expanded downwards in lateral view; 2.44 times longer than wide in dorsal view; anal style strap-shaped, not beyond anal segment. Gonostyli (Fig. 5B, C View Figure 5 ) ventrally symmetrical; in inner lateral view, middle part slender but base and apex enlarged. Aedeagus (Fig. 5E-H View Figure 5 ) with three processes. In left side view, basal ventral margin of periandrium with a triangular laminal process, of which middle right side concaved heavily, forming two large processes, one directed cephalad, another directed caudad, basal dorsal margin of periandrium with a laminal process, of which near apex of dorsal margin recessed, apex convex, left side of margin dentate; in right side view, apical ventral margin of periandrium projecting, near apex with a long spinose process, curved upwards, directed dorsocephalad; in dorsal view, laminal process grooved, arising at left side of basal dorsal margin of periandrium, left side convex, apical right side rolling, middle part concave in a right angle, apex of periandrium with a long spinose process, slightly curved, directed cephalad; in ventral view, near apex of grooved laminal process with a long spinose process, slightly curved, directed cephalad. Endosoma slightly sclerotized, without process.
Distribution.
China (Xizang) (Fig. 12 View Figure 12 ).
Etymology.
The specific name is derived from the Latin adjective gracilispinus, referring to the one long spinose process arising from the apical right side of the ventral margin of the periandrium.
Remarks.
Male genitalia of A. gracilispinus sp. nov. are similar to A. venustus Tsaur & Hsu, 1991 in appearance, but differs in: (1) basal left side of ventral margin of periandrium with a triangular laminal process, of which middle right side concaved heavily, forming two large processes ( A. venustus with a spinose process in the same position); (2) near apical right side of ventral margin of periandrium with a long spinose process, slightly curved (right side of ventral margin of periandrium without spinose process in A. venustus ); (3) basal dorsal margin of periandrium with a grooved laminal process (without process in A. venustus ).
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