Cavariella angelicae (Matsumura, 1918)

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 angelicae (Matsumura, 1918)

Figs 5 , 32E

Metaphis angelicae Matsumura, 1918: 1.

Specimens examined.

Two ap. viv. fems. (slides) and one ap. viv. fem. (COI: OP956148 ), China: Sichuan ( Ganzi City ), 15.VI.2021, No. 51435-1-1, on Salix , coll. T.Y. Liu and S. Xu ; one ap. viv. fem. and one ala. viv. fem. (slides), one ap. viv. fem. (COI: OP956145 ), Sichuan ( Ganzi City ), 12.VI.2021, No. 50575-1-1, on Salix , coll. T.Y. Liu and S. Xu ; two ap. viv. fems. and two ala. viv. fems. (slides), one ap. viv. fem. (COI: OP956146 ), Sichuan ( Ganzi City ), 12.VI.2021, No. 50588-1-1, on Salix , coll. T.Y. Liu and S. Xu ; one ap. viv. fem., Hebei, 6.V.2021, No. 49999-2-1, on Salix , coll. G.X. Qiao.

Diagnosis.

Antennae 5-segmented (Fig. 5C ), PT 1.95-2.39 × Ant. Vb; URS long wedge-shaped (Fig. 5D ), 1.15-1.36 × HT II; ABD TERG VIII with short rectangular supra-caudal process (Fig. 5G ); SIPH cylindrical not swollen (Fig. 5H ); cauda short tongue-shaped (Fig. 5I ), with four or five setae ( Matsumura 1918; Miyazaki 1971; Zhang and Zhong 1990).

Comment.

The species resembles Cavariella digitata and Cavariella theobaldi in SIPH being long and cylindrical, and not swollen, supra-caudal process short. But the species differs from C. digitata as follows: URS long and wedge-shaped, distinctly longer than HT II, 1.15-1.36 × HT II ( C. digitata : URS wedge-shaped, 1.00-1.10 × HT II); supra-caudal process rectangular, blunt with two setae distally ( C. digitata : supra-caudal process triangular, with two setae distally and 1-3 short setae basally); PT 3.00 × Ant. Vb ( C. digitata : PT 1.25-1.45 × Ant. Vb). The species differs from C. theobaldi as follows: antennae 5-segmented ( C. theobaldi : antennae 6-segmented); URS long wedge-shaped, longer than cauda ( C. theobaldi : URS wedge-shaped, shorter than cauda) ( Miyazaki 1971).

Biology.

The species feeds on tender tips of Apiaceae ( Angelica , Heracleum , Pastinaca , Sium ) ( Miyazaki 1971; Blackman and Eastop 2022). In China, the species feeds on Salix (Fig. 32E ), Heracleum , and Angelica . Hence, the species may be heteroecious holocyclic; Salix is the primary host plant and Apiaceae is the secondary host plant.

Distribution.

China (Hebei, Sichuan), Japan, Kazakhstan, Korea, Russia.

Figures

Figure 5. Cavariella angelicae (Matsumura). 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 supra-caudal process on abdominal tergite VIII H siphunculus I cauda. Alate viviparous female: J dorsal view of body K antennal segments I-IV L supra-caudal process on abdominal tergite VIII M cauda N anal plate O genital plate. 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.