Cavariella Del Guercio, 1911

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 Del Guercio, 1911

Cavariella Del Guercio, 1911: 323. Type species: Aphis pastinacae Linnaeus, 1758.

Diagnosis.

Body dorsum with various ornaments: wrinkles, irregularly circular or semicircular sculptures, small papillate tubercles. Frons convex. Antennae shorter than body length, without secondary rhinaria in apterae; in alatae, Ant. III with circular secondary rhinaria distributed over the whole segment, sometimes the secondary rhinaria protruded, Ant. IV and V usually with circular secondary rhinaria. ABD TERG VIII with a spinal supra-caudal process varying from a very long conical process to an indistinct swelling and possessing two setae distally; in alatae, the supra-caudal process is reduced and wart-like. Siphunculus clavate, swollen distally, sometimes elongated cylinder and not swollen, with imbrications. Cauda elongate conical, conical, or tongue-shaped.

Taxonomy.

The genus Cavariella has been divided into three subgenera, Cavariella Cavaraiellia Heinze, Cavariellinepicauda Ivanovskaja, and the nominate subgenus Cavariella Cavariella Del Guercio.

Biology.

Most species of the genus characteristically alternate hosts, Salix species being the primary host, and plant species of diverse families, frequently Apiaceae the secondary host. Aphids colonize the aerial parts of plants, mainly tender ones.