Phyllococcus, Ehrhorn, 1916

Percy, Diana M., Watson, Gillian W. & Hodgson, Chris J., 2024, The endemic Hawaiian mealybug genus Phyllococcus Ehrhorn, 1916 (Hemiptera: Coccomorpha: Pseudococcidae): redescription of the type species and description of a new species on an endangered host plant, Cryptocarya mannii (Lauraceae), Zootaxa 5447 (3), pp. 355-372 : 370

Key to the adult females of Phyllococcus species

1. On Touchardia sandwicensis ( Urticaceae ). Gall triangular or “horn-shaped”, narrowing towards apex ( Fig. 1 ). Sclerotised dorsal shield composed of abdominal segments VII, VI and V only. Anal lobes each triangular and pointed, with 2 spinose setae on apex. Translucent pores on hind legs present on trochanter and tarsus as well as femur and tibia............................................................................................. Phyllococcus oahuensis (Ehrhorn)

- On Cryptocarya mannii ( Lauraceae ). Gall rounded or “domed”, not narrowing significantly towards apex ( Fig. 4 E ). Sclerotised dorsal shield composed of abdominal segments VII–III.Anal lobes rather square, with spinose setae all along margin. Translucent pores on hind legs restricted to femur and tibia............. Phyllococcus cryptocaryae Percy, Watson & Hodgson , sp. n.

Figures

FIGURE 1. A. Galls of Phyllococcus oahuensis (Ehrhorn) on a leaf of Touchardia sandwicensis, found on Maui in 2007; B. Closer view of galls of Ph. oahuensis. Photographs by Karl Magnacca.

FIGURE 4. A. Galls of triozid psyllid, Paurotriozana adaptata Caldwell, distributed along midrib and veins on underside of leaves of Cryptocarya mannii (arrow indicates vacated gall cavity); B. Pa. adaptata, last-instar immature psyllid with dorsal surface close to surface of the gall; C. Illustration showing the shape of the psyllid gall in cross section (dotted line indicates position of the dorsal surface of the immature psyllid); D. Adult female Ph. cryptocaryae after removal from gall chamber (arrow indicates oval anal shield); E. Illustration showing the shape of the mealybug gall in cross section (dotted line indicates position of the dorsal surface of the anal shield); F. Cryptocarya mannii leaf showing protrusions on the upper leaf surface caused by the galls of Ph. cryptocaryae. Photographs by Karl Magnacca.