Aspidophorodon Verma, 1967

Aspidophorodon Verma 1967: 507. Type species: Aspidophorodon harvense Verma 1967; by original designation. Miyazaki 1971: 183; Eastop and Hille Ris Lambers 1976: 95; Remaudière and Remaudière 1997: 73; Zhang et al. 1999: 349; Blackman and Eastop 2006: 1098; Stekolshchikov and Novgorodova 2010: 44; Nieto Nafría et al. 2011: 145; Chen et al. 2015: 557.

Indotuberoaphis Chakrabarti & Maity 1984: 198. Type species: Indotuberoaphis sorbi Chakrabarti & Maity 1984; by original designation.

Margituberculatus Zhang, Zhong & Zhang 1992: 381. Type species: Margituberculatus longituberculatum Zhang, Zhong & Zhang 1992; by original designation.

Raychaudhuriella Chakrabarti 1978: 355. Type species: Raychaudhuriella myzaphoides Chakrabarti 1978: 357; by original designation.

Generic diagnosis.

Head with three processes on frons; median frontal tubercle in apterae distinctly protuberant, hemispherical, rectangular, or forked, sometimes with a depression at the middle; antennal tubercles undeveloped, but each with a cylindrical, finger-shaped, or long horn-shaped process at inner apex, the process higher or lower than median frontal tubercle in apterae. Body dorsum with various markings in apterous viviparous females: wrinkles, irregular polygonal reticulations, oval or semicircular sculptures, or small papillate tubercles. Antennae 4- or 5-segmented (rarely 6-segmented) in apterae, 5- or 6-segmented in alatae. Ant. I usually rounded or projected to short cylindrical at inner apex. Secondary rhinaria present on antennal segments III-V in alatae. SIPH spoon-shaped, broad at base, thin at the middle, slightly swollen distally, obliquely truncated at tip, without flange. Cauda tongue-shaped or elongate conical, slightly constricted near the middle, sometimes with a constriction at base, with 4-5 setae, rarely 6-11.

Distribution.

Canada, China, India, Japan, Russia (Sakhalin, the Altai Republic, and the Kuril Islands), and Kashmir region.

Host plants.

Rosaceae ( Cotoneaster, Potentilla, Sorbus, Spiraea), and Salicaceae ( Salix), rarely on Polygonaceae ( Polygonum).

Comments.

The genus Aspidophorodon includes two subgenera, the nominate subgenus and subgenus Aspidophorodon Eoessigia . The most important difference between the two subgenera is the presence of at least one spinal process on abdominal tergite VIII in Aspidophorodon (Eoessigia), whereas no such spinal process is found on members of the nominate subgenus. See Chen et al. (2015) for a key to subgenera.