Phyllium (Pulchriphyllium) giganteum Hausleithner, 1984 Figure 3A-E

Distribution.

Malaysia: (Peninsular) Perak, Pahang, and Selangor States; (Bornean) Sarawak (Bintulu Division) and Sabah (Pensiangan) States. Indonesia: Sumatra, Bengkulu Province; (Borneo) West Kalimantan Province (Mount Bawang).

Range expansion.

Indonesia: West Java Province (Mount Halimun and Mount Gede) (Figure 3 A-C).

Discussion.

Phyllium giganteum is a widely distributed species ranging from Peninsular Malaysia (the type locality), to Borneo, Sumatra, and most recently Java, Indonesia, the furthest south this species is currently known to occur (Cumming et al. 2018) (Figure 4).

As a morphologically variable species with regards to abdominal shape and coloration (Cumming et al. 2018), numerous morphological aspects have been reviewed across all known populations (including the several recently examined Javan specimens) with no consistent feature allowing morphological separation of any one population from the others. Future molecular studies based on a comprehensive taxon sampling throughout the Phyllium giganteum range might provide evidence of genetic differences between populations of this widely distributed lineage. Unfortunately, given that our current review is solely based on adult morphology we have no basis to separate the widely distributed Phyllium giganteum into subspecies, assuming such a distinction is warranted.