Cavariella aegopodii (Scopoli, 1763)

Xu, Ying, Chen, Jing, Jiang, Li-Yun & Qiao, Ge-Xia, 2023, Cavariella Del Guercio (Hemiptera, Aphidinae, Macrosiphini) in China, with a new species, new synonymies, and first country records, ZooKeys 1169, pp. 235-292 : 235

Cavariella aegopodii (Scopoli, 1763)

Figs 3 , 4 , 32D

Aphis aegopodii Scopoli, 1763: 137.

Specimens examined.

Six ap. viv. fems. and four ala. viv. fems., China: Yunnan, 25.V.1980, No. 7157, on Foeniculum vulgare , coll. T.S. Zhong and L.Y. Wang ( Zhang and Zhong 1984) ; one ap. viv. fem., Gansu (Zhangxian County), 24.VII.1986, No. 8501-3-4, on Salix , coll. G.X. Zhang, T.S. Zhong and J.H. Li ( Zhang et al. 1999) ; one ap. viv. fem. (slide) and one ap. viv. fem. (COI: OP956128 ), Tibet ( Lasa City ), 23.VIII.2017, No. 40940-1-1, on Salix , coll. X.Y. Luo ; two ap. viv. fems. (slides) and one apterous female (COI: OP956143 ), Yunnan ( Lijiang City ), 26.V.2021, No. 50266-1-1, on Salix , coll. T.Y. Liu and S. Xu ; two ap. viv. fems. (slides) and one apterous female (COI: OP956151 ), Tibet ( Xigaze City ), 16.VII.2021, No. 51884-1-1, on Salix , coll. Y. Xu ; three ala. viv. fems. and one ap. viv. fem., Qinghai ( Xining City ), 5.VI.1997, No. 11333, on Salix , coll. X.L. Chen ; one ala. viv. fem. and one ap. viv. fem., Sichuan, 24.VIII.2013, No. 30092-1-1, on unknown host plant, coll. R. Chen.

Diagnosis.

URS shorter than HT II and without accessory setae (Fig. 3E, F ); PT 0.85-1.14 × Ant. VIb, mostly longer than Ant. VIb (Fig. 3C ); supra-caudal process longer than 1/2 of cauda but rarely extending beyond tip of cauda (Fig. 3I ) ( Zhang and Zhong 1984; Zhang et al. 1999).

Biology.

Primary host plant: Salix ; secondary host plant: Apiaceae . The species feeds on leaves and tender tips of Salix (Fig. 32D ). The species is a major pest of cultivated Apiaceae , and it feeds on leaves and umbels of many genera in Apiaceae ( Blackman and Eastop 2022).

Distribution.

China (Heilongjiang, Gansu, Qinghai, Sichuan, Taiwan, Tibet, Xinjiang, Yunnan, Zhejiang) ( Zhang et al 1992; Jiang et al 2011), Canada, Europe, USA.

Figures

Figure 3. Cavariella aegopodii (Scopoli). Apterous viviparous female: A dorsal view of body B dorsal view of head C antenna D mesosternal furca E ultimate rostral segment F second hind tarsal segment G sculptures of abdominal tergites H siphunculus I supra-caudal process on abdominal tergite VIII J cauda K anal plate L genital plate. Scale bars: 0.10 mm.

Figure 4. Cavariella aegopodii (Scopoli). Alate viviparous female: A dorsal view of body B antenna C siphunculus D supra-caudal process on abdominal tergite VIII E cauda. Scale bars: 0.10 mm.

Figure 32. The ecological habitat photographs of Cavariella in the field A, B the apterae and nymphs of Cavariella aquatica (Gillette & Bragg) feeding on the leaves of Salix along main vein C the apterae and nymphs of Cavariella aquatica feeding on the leaves of Poaceae D the apterae and nymphs of Cavariella aegopodii (Scopoli) feeding on the leaves of Salix along main vein E the apterae and nymphs of Cavariella angelicae (Matsumura) feeding on the tender leaves of Salix F the apterae and nymphs of Cavariella araliae Takahashi feeding on tender tips of Aralia G the apterae and nymphs of Cavariella bhutanensis Chakrabarti & Das feeding on the leaves of Salix along main vein H the apterae of Cavariella gilgiana Zhang, Chen, Zhong & Li feeding on the leaves of Salix.