Rhododendron

Özdemir, Shalva Barjadze Işil, 2014, A new genus of Macrosiphini Wilson, 1910 (1887) (Hemiptera: Aphididae) from Rhododendron in Turkey, Zootaxa 3835 (1), pp. 121-126 : 122

Key to aphid genera with spinulose second tarsal segment from Rhododendron spp. worldwide based on

apterous viviparous females

1. Siphunculus with subapical zone of polygonal reticulation.......................................... Illinoia Wilson

-. Siphunculus without subapical zone of polygonal reticulation................................................... 2

2. Antennal segment III with secondary rhinaria............................................ Rhododendraphis gen. n.

-. Antennal segment III without secondary rhinaria............................................................. 3

3. Dorsal processes on abdomen present...................................................................... 4

-. Dorsal processes on abdomen absent...................................................................... 5

4. Scabrous dorsal processes present on abdomen. Cauda with 5–6 hairs...... Chaetomyzus A.K. Ghosh & D.N. Raychaudhuri

-. Smooth, hemispherical dorsal processes present on abdomen. Cauda with 24–60 hairs............. Indomasonaphis Verma

5. Siphunculi conspicuously warty or nodulose throughout length. Head projecting forward in front of antennal bases.......................................................................................... Vesiculaphis del Guercio

-. Siphunculi smooth or with normal imbrication. Head not projecting forward in front of antennal bases.................. 6

6. Ultimate rostral segments 3–4 times length of second segment of hind tarsus. Antennal segment III with spinules on imbrica- tions.......................................................................... Rostratusaphis Fang & Qiao

-. Ultimate rostral segments 1–2 times length of second segment of hind tarsus. Antennal segment III smooth or imbricated, but without spinules....................................................................................... 7

7. Antennal and median tubercles not developed. Triommatidium not distinct. Dorsum of abdomen wrinkled... Indiaphis Basu

-. Antennal and median tubercles developed. Triommatidium distinct. Dorsum of abdomen smooth........ Ericolophium Tao