Austrochrysa angusta, Ma & Yang & Liu, 2020

Ma, Yunlong, Yang, Xingke & Liu, Xingyue, 2020, The green lacewing genus Austrochrysa Esben-Petersen, 1928 (Neuroptera: Chrysopidae) from China, with description of two new species, Zootaxa 4822 (1), pp. 101-112 : 108

publication ID	https://doi.org/ 10.11646/zootaxa.4822.1.5
publication LSID	lsid:zoobank.org:pub:DCF5DEF6-73ED-4D4E-B094-674FD58D9E73
DOI	https://doi.org/10.5281/zenodo.4401323
persistent identifier	https://treatment.plazi.org/id/03E11D01-9A02-FFE1-82EA-FF39B463F81B
treatment provided by	Plazi
scientific name	Austrochrysa angusta
status	sp. nov.

Treatment

Austrochrysa angusta sp. nov.

( Figs 5–6 View FIGURE 5 View FIGURE 6 , 7 View FIGURE 7 )

Material examined. Holotype ♂, China, Yunnan, Xishuangbanna (ĸuhṷ), Menglun (Rƨ), No.55 Experimental site, 780 m, 2019.IV.25, Li Hongyu ( CAU) . Paratypes 20♂, 17♀, China, Yunnan, Xishuangbanna (ĸuhṷ), Menglun (Rƨ), No.55 Experimental site, 780 m, 2019.IV.25, Li Hongyu ( CAU) ; 3♂, 1♀, 1ex, China, Yunnan, Xishuangbanna (ĸuhṷ), Menglun (Rƨ), No.55 Experimental site, 780 m, 2019.IV.28, Li Hongyu ( CAU) .

Diagnosis. Head immaculate ( Fig. 5A View FIGURE 5 ). Pronotum with median spots not projected ( Fig. 5B View FIGURE 5 ). Pretarsal claw ( Fig. 5D View FIGURE 5 ) with basal dilation about half as long as claw hook, lateral outer margin almost straight. Forewing with base of outer gradates black ( Fig. 5C View FIGURE 5 ). Abdomen with yellowish markings on terga 2–8. Sterna 8+9 about 3 times as long as wide ( Fig. 6B View FIGURE 6 ). Apical invagination of sterna 8+9 moderate. Tignum narrow ( Fig. 6D View FIGURE 6 ); gonarcus about 4 times as long as wide ( Fig. 6C View FIGURE 6 ); entoprocessus curved inward apically ( Fig. 6E View FIGURE 6 ).

Description. Measurements: Head width 1.20–1.50 mm; ratio of head width/eye width = 1.28–2.50; prothorax 1.20–1.50 mm long and 0.90–1.10 mm wide. Forewing 13.00–17.00 mm long, 4.00–5.00 mm wide; 11–13 radial cells; 6 Banksian cells (b cells), 5 lower Banksian cells (b’ cells); 6 inner gradates, 7 outer gradates. Hind wing 12.00–14.00 mm long, 3.50–4.50 mm wide; 10–11 radial cells; 4 Banksian cells (b cell), 4 lower Banksian cell (b’ cells); 5 inner gradates, 6 outer gradates.

Head ( Fig. 5A View FIGURE 5 ): Vertex and frons pale green, immaculate; gena and tentorial pits unmarked; scape unmarked; clypeus and labrum unmarked; maxillary palp and labial palp pale green.

Thorax ( Fig. 5B View FIGURE 5 ): Almost pale green. Pronotum with median oval spot not projected. Pretarsal claw ( Fig. 5D View FIGURE 5 ) with basal dilation about half as long as claw hook, lateral outer margin almost straight.

Wings ( Fig. 5C View FIGURE 5 ): Forewing narrow, hyaline. Radical crossveins at junction with R, the first and median radial crossveins, base of outer gradates black; first intramedian cell long and narrow, ovate; gradates in two rows; inner gradates pale green; hind wing narrow, more acutely tapering apically than forewing, hyaline; veins almost pale green; gradate in two rows.

Abdomen pale green, with yellowish markings on terga 2–8. Abdominal setae white, microsetae dense, and long setae sparse.

Male ( Fig. 6 View FIGURE 6 ): Tergum 9+ectoprocts short, about half as long as tergum 8; callus cerci oval, about 1.5 times as long as wide. Sterna 8+9 fused, very narrow, about 3 times as long as wide, with line of fusion not demarcated; lateral margin slightly tapered, posterior margin moderately invaginated. Tignum present, projected medially; gonarcus moderately broad, almost as long as mediuncus; entoprocessus curved inward apically; mediuncus trilobed apically, with lateral lobe moderately curved in lateral view, about half as long as ventral median lobe.

Female ( Fig. 6 View FIGURE 6 ): External characters same as male. Sternum 7 straight posteromedially, setose posteriorly. Subgenitale bilobed apically; spermatheca oval, about 1.5 times as long as wide; ventral impression moderate; vela about twice as long as spermathecal width; spermathecal duct much longer than spermatheca.

Etymology. The specific epithet “ angusta ”, an adjective in the feminine gender, refers to the narrower sterna 8+9 of this species.

Distribution. China (Yunnan).

Remarks. The new species can be distinguished by the apex of male sterna 8+9 almost reaching the apex of tergum 9+ectoprocts (it exceeds the apex of tergum 9+ectoprocts in A. abnormis abnormis ), the black median radial crossveins (green in A. abnormis javanensis ), the presence of medio-lateral spots on pronotum (absent in A. hexasticha and A. leucoptera ), the radial crossveins merely oblique medially (almost all are oblique in A. loriana ), the presence of two series of gradate crossveins (three gradate series in A. samoana ), and the green second cubital cell (black in A. apoana ).

Austrochrysa angusta sp. nov. is similar to A. tropica in having pretarsal claw with basal dilation about half as long as claw hook and not having projected medio-lateral spots on pronotum but it differs from A. tropica by pretarsal claw with lateral outer margin almost straight (moderately rounded in A. tropica ), the narrower sterna 8+9 (about 3 times as long as wide in A. angusta sp. nov. versus twice as long as wide in A. tropica ), narrow tignum (broad in A. tropica ), broad gonarcus (about 4 times as long as wide in A. angusta sp. nov. versus 5 times as long as wide in A. tropica ), the entoprocessus curved inward apically (not curved inward in A. tropica ), and the slightly shorter median lobe compared to ventral median lobe (much shorter in A. tropica ).