Prionococcus

Pellizzari, Giuseppina & Hodgson, Chris, 2007, A new species of Prionococcus (Hemiptera: Sternorrhyncha: Coccoidea: Coccidae) from Mexico, with a discussion of its affinities, Zootaxa 1481, pp. 1-19 : 3

Key to instars of species currently included in Prionococcus :

1. Wings fully developed; head, thorax, and abdomen clearly demarcated; penial sheath several times longer than broad ......................................................................................................................................adult male

- Wings either absent or only represented by wing-buds; head, thorax, and abdomen not clearly demarcated; penial sheath short or absent........................................................................................................................ 2

2. Wing-buds present; penial sheath and abdominal lobes VII and VIII present; anal plates absent.............. 3

- Wing-buds absent; penial sheath and lobes on abdominal segment VII and VIII absent; anal plates present ..................................................................................................................................................................... 4

3. Antennae short, not nearly reaching anterior margin of wing-bud; penial sheath shorter than lobes on abdomen VII ..................................................................................................................................... prepupa

- Antennae long, reaching anterior margin of wing-bud; penial sheath longer than lobes on abdominal seg- ment VII ................................................................................................................................................ pupa

4. Pregenital disc-pores present on pregenital segment; preopercular pores present on dorsum .. adult female

- Pregenital disc-pores and preopercular pores absent................................................................................... 5

5. Each anal plate with a very long apical seta ....................................................................... 1st-instar nymph

- Long anal plate setae absent ........................................................................................................................ 6

6. Tubular ducts present on dorsum ............................................................................. 2nd-instar male nymph

- Tubular ducts absent from dorsum ........................................................................ 2nd-instar female nymph