Cavariella bhutanensis Chakrabarti & Das, 2009

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 bhutanensis Chakrabarti & Das, 2009

Figs 8 , 9 , 32G

Cavariella bhutanensis Chakrabarti & Das, 2009: 39.

Specimens examined.

One ala. viv. fem., China: Tibet (Nyalam County), 9.VIII.2010, No. 25818-1-1, on Apiaceae , coll. Y. Wang ; one ala. viv. fem. and two ap. viv. fems., Tibet ( Nyingchi City ), 3.VIII.2010, No. 25756-1-1, on Apiaceae , coll. G.X. Qiao ; one ap. viv. fem. (slide) and one ap. viv. fem. (COI: OP956120 ), Tibet (Nyalam County), 22.VII.2014, No. 32711-1-1, on Salix , coll. J. Chen and X.C. Zhu ; one ap. viv. fem., Tibet ( Shannan City ), 9.VI.2016, No. 37289-1-1, on Salix , coll. F.F. Niu ; one ap. viv. fem., Tibet (Jilong County), 24.VII.2014, No. 32732-1-1, on Salix , coll. J. Chen and X.C. Zhu ; two ap. viv. fems. (slides) and one ap. viv. fem. (COI: OP956152 ), Tibet (Bailang County), 17.VII.2021, No. 51895-1-1, on Salix , coll. Y. Xu ; two ap. viv. fems., Tibet (Pulan County), 31.VII.2021, No. 52077-1-1, on Salix , coll. Y. Xu ; two ap. viv. fems., Tibet (Jilong County), 31.VII.2021, No. 52011-1-1, on Apiaceae , coll. Y. Xu.

Diagnosis.

PT 1.31-1.72 × Ant. VIb; URS 0.11-0.15 mm, long wedge-shaped (Fig. 8D ), 1.75-2.68 × BW URS, 0.91-1.17 × HT II; ABD TERG VIII with conical supra-caudal (Fig. 8H ), 0.65-1.14 × cauda; siphunculus 2.00-2.58 × of cauda ( Chakrabarti and Das 2009).

Comment.

The species is recorded in China for the first time, and with some variations from the original description as follows: PT 1.27-1.40 × Ant. VIb; URS 1.15-1.28 × HT II; supra-caudal process 1.05-1.14 × cauda in Bhutan.

The species resembles Cavariella aegopodii but differs as follows: PT 1.31-1.72 × Ant. VIb ( C. aegopodii : PT 1.12 × Ant. VIb); URS elongate wedge-shaped, 0.91-1.17 × HT II ( C. aegopodii : URS wedge-shaped, shorter than HT II).

Biology.

The species was found feeding on Salix (Fig. 32G ) and Apiaceae in China, and it also been described feeding on Salix in Bhutan ( Chakrabarti and Das 2009). So, the species may migrate between the two plants.

Distribution.

China (Tibet), Bhutan.

Figures

Figure 8. Cavariella bhutanensis Chakrabarti & Das. Apterous viviparous female: A dorsal view of body B dorsal view of head C antenna D ultimate rostral segment E mesosternal furca F sculptures of abdominal tergites G siphunculus H supra-caudal process on abdominal tergite VIII I cauda J genital plate. Scale bars: 0.10 mm.

Figure 9. Cavariella bhutanensis Chakrabarti & Das. Alate viviparous female: A dorsal view of body B dorsal view of head C siphunculus D supra-caudal process on abdominal tergite VIII E antenna. 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.