Myzus (Sciamyzus), Stroyan, 1954, Stroyan, 1954

Tomić, Mihajlo, Jovičić, Ivana & Petrović-Obradović, Olivera, 2024, Description of fundatrix and sexual morphs of the Asian apricot aphid, Myzus mumecola (Matsumura, 1917) (Hemiptera: Aphididae), Zootaxa 5537 (3), pp. 395-406 : 403

Subgenus Sciamyzus

Apterous viviparous female: 1) dorsal cuticle wrinkled or scaly 2) siphunculi 0.81 times the length of antennal segment III or shorter and the shortest diameter of their basal parts slightly broader than the diameter of hind tibiae in the middle

Alate viviparous female: dorsal cross bands on abdominal tergites III–V not fused into a patch

However, there is considerable variation in the clavateness of the siphunculi, while tibial spinulosity remains a consistent character ( Basu & Raychaudhuri 1976). Myzus mumecola currently belongs to the subgenus Myzus Passerini. On examining the material in this study, it was determined that M. mumecola has a first tarsal segment formula 3:3:2 ( Fig. 6 ). The fundatrix has tapering or slightly swollen siphunculi, oviparous females and alate males have slightly to moderately swollen siphunculi. The first instar nymph (fundatrigenia) has smooth hind tibiae without spinules ( Fig. 7a ). The return migrant alata (gynopara) ( Fig. 5d ) from the yet unknown secondary host is very similar to the spring migrant alata and alate male. It differs from the alate male by having a more compact central patch with 1–2 windows and from the spring migrant alata by having swollen siphunculi. Since these characters align well with the subgeneric taxonomy for the subgenus Nectarosiphon as described by Heie (1994), we transfer here M. mumecola to this subgenus.

Figures

FIGURE 5. Photographs of clarified slide mounts of Myzus mumecola: a—fundatrix, b—oviparous female, c—alate male, d—alate gynopara

FIGURE 6. Tarsi of the oviparous female of Myzus mumecola: a—fore tarsus, b—middle tarsus, c—hind tarsus

FIGURE 7. Hind tarsus of a nymph of a—Myzus mumecola, b—Myzus cerasi