Indomasonaphis Verma, 1971

Nazarov, Shokhruz, Xu, Ying, Jiang, Li-Yun & Qiao, Ge-Xia, 2025, A new species and two new records of Indomasonaphis Verma, 1971 (Hemiptera, Aphididae) from China, ZooKeys 1253, pp. 343-362 : 343-362

Indomasonaphis Verma, 1971

Indomasonaphis Verma, 1971: 97. Type species: Indomasonaphis indicum Verma, 1971 (= Masonaphis anaphalidis Basu, 1964), by original designation. Type locality: Shimla, Himachal Pradesh, India.

Generic diagnosis.

Indomasonaphis species can be recognized by the following combination of characters: body large and elongated oval; body dorsum smooth with sparse long, thick, and blunt or capitate setae; frons concave, median frontal tubercle distinct and low-rounded, antennal tubercles developed protuberate and diverging; antennae 6 - segmented, Ant. III mostly without secondary rhinaria in apterae, except in I. polygoni sp. nov. with 22–41 secondary rhinaria distributed on the basal half; in alate, Ant. III with 60–130 round secondary rhinaria distributed throughout the segment, Ant. IV with 4–30 secondary rhinaria; PT at least 4.00 times of Ant. VIb; legs long, and with numerous long and pointed setae; 2 HT with spinulose imbrications; SIPH long and clavate, cylindrical at basal 1 / 3, distinctly expanded at distal 2 / 3, and then gradually attenuated to apex; apical part of SIPH with several transverse rows of imbrications, sometimes coalescing into reticulations, and with a developed flange; cauda wide and long conical, with numerous setae; first tarsal chaetotaxy: 5, 5, 5, or 3, 3, 3.

Taxonomic comments.

The genus resembles Illinoia Wilson, 1910 in the clavate SIPH and conical cauda, but differs from it as follows: (1) SIPH long, clavate, cylindrical at basal 1 / 3 and distinctly expanded at distal 2 / 3 ( Illinoia : SIPH long, cylindrical, sometimes weakly to moderately swollen at distal 1 / 3); (2) dorsal setae long, thick, and blunt ( Illinoia : dorsal setae short and blunt); (3) Ant. III mostly without secondary rhinaria in apterae ( Illinoia : Ant. III with at least two secondary rhinaria in apterae); and (4) cauda wide and long conical, with numerous long and pointed setae ( Illinoia : cauda elongate conical, bearing 6–10 short and pointed setae).

The genus is also similar to Chaetomyzus Ghosh & Raychaudhuri, 1962 in the clavate SIPH and spinulose 2 HT, but differs from it as follows: (1) median frontal tubercle slightly swollen, antennal tubercles developed protuberate and diverging ( Chaetomyzus : median frontal tubercle slightly swollen, antennal tubercles distinct but low-rounded and diverging); (2) body dorsum smooth, without tubercles ( Chaetomyzus : body dorsum with paired processes); (3) PT at least 4.00 × of Ant. VIb ( Chaetomyzus : PT at most 2.00 × of Ant. VIb); and (4) cauda wide and long conical, with numerous setae ( Chaetomyzus : cauda conical, with few setae).

The genus also resembles Liosomaphis Walker, 1868 in the clavate SIPH, but differs from it as follows: (1) frons concave, median frontal tubercle slightly swollen, antennal tubercles developed protuberate and diverging ( Liosomaphis : frons shallow W-shaped, antennal tubercles low-rounded, median frontal tubercle distinctly protuberate, higher than antennal tubercles); (2) antennae as long as body length, PT at least 4.00 × of Ant. VIb ( Liosomaphis : antennae ~ 0.50 × of body length, PT ~ 1.50 × of Ant. VIb); (3) dorsal setae long, thick, and blunt ( Liosomaphis : dorsal setae short and point).

Distribution.

China, India, Pakistan.