Keys to the species of Phyllium (Phyllium) of New Guinea

♀

1. Body length> 75 mm .................................................................................. 2

- Very small, body length <60 mm (Figs 1–4)....................................................... riedeli n. sp.

2. Abdomen broad, either angular in outline or ± lobed..........................................................3

- Abdomen slender, segments V–X more or less gradually tapered (Fig. 7A)................................. caudatum

3. Abdominal segments VII–VIII ± lobed; prosternum with a spiniform process; exterior lobe of profemora narrower than interior lobe (Fig. 7B)................................................................................... elegans

- Abdominal segments VII–VII not lobed; no spiniform process on prosternum; exterior lobe of profemora ± equal in width to interior lobe (Fig. 7C)............................................................................ zomproi

♂ *

1. Abdomen broad, <2x longer than head and thorax combined................................................... 2

- Abdomen very elongate and slender,>2x longer than head and thorax combined and segments V–X gradually tapered................................................................................................... caudatum

2. Exterior lobe of profemora rounded and almost as wide as interior lobe; interior lobe with 5–6 small, roughly equally sized teeth.......................................................................................... zomproi

- Exterior lobe of profemora very slender and much narrower than interior lobe; interior lobe with two large and three small intervening teeth................................................................................. telnovi

* The ♂ of Ph. (Ph.) zomproi is only known from a subadult nymph, which was illustrated by Grösser, 2001: 104, fig. 132 and Grösser, 2008: 146, fig. 181. The key features here used are however most likely also true for the adult insect, which is seen by comparison of adults and immature specimens of other species in the genus.