Phyllium (Phyllium), 1798

Kamp, Thomas Van De & Hennemann, Frank H., 2014, A tiny new species of leaf insect (Phasmatodea, Phylliidae) from New Guinea, Zootaxa 3869 (4), pp. 397-408 : 407

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.

Figures

FIGURE 1. Female holotype of Phyllium (Ph.) riedeli n. sp.. A: Dorsal aspect; B: ventral aspect.

FIGURE 2. Head morphology of Phyllium (Ph.) riedeli n. sp.. A: Head capsule, dorsal aspect; B: head capsule, ventral aspect; C: SEM photograph of left antenna; D: antennae, dorsal aspect; E: SEM photograph of antennomere III. III–IX = antennomeres; p = pedicellus; pmt = posteromedian tubercle; pt = protuberance; sc = scapus; sf = stridulatory file; sr = stridulatory ridge.

FIGURE 3. Thorax of Phyllium (Ph.) riedeli n. sp.. A: Pronotum, dorsal aspect; B: prosternum, ventral aspect; C: mesopraescutum and mesopleurae, dorsal aspect; D: mesosternum, ventral aspect; E: rudimentary ala. al = ala; mp = mesopleura; mps = mesopraescutum; t = tegmen.

FIGURE 4. Genitalia and legs of Phyllium (Ph.) riedeli n. sp.. A: Genitalia, ventral aspect; B: meso- and metacoxa, ventral aspect; C: profemur and protibia, dorsal aspect. fel = profemoral exterior lobe; fil = profemoral interior lobe; til = protibial interior lobe; mcx = mesocoxa; mtcx = metacoxa; pf = profemur; ptb = protibia; sp = subgenital plate.

FIGURE 7. A: Phyllium (Ph.) caudatum Redtenbacher, 1906 ♀ 77.0 mm (coll. FH, No. 0076-1); B: Phyllium (Ph.) elegans Grösser, 1991 ♀ holotype 81.2 mm (ZSMC); C: Phyllium (Ph.) zomproi Grösser, 2001 ♀ 85.5 mm (coll. FH, No. 0380-1); D: Phyllium (Ph.) siccifolium (Linnaeus, 1758) ♀ 95.0 mm (coll. FH, No. 0567-4).