Nyctimystes

Nyctimystes is a genus of tree frogs in the subfamily Pelodryadinae of the family Hylidae. They are principally Papuan species, but also inhabit islands in the Moluccas. All species in this genus have one distinct feature that separates them from other species in the family, the lower eyelid is marked with pattern of lines, veins, or dots. This feature presumably acts as camouflage when the frogs are at rest during the day.
Species of this genus inhabit tropical or subtropical montane rainforest. The eggs are large and are laid on submerged objects in fast-flowing creeks and streams (not all species of this genus have been recorded as doing this, although it is assumed). The tadpoles have large sucker-mouths and their body shapes are very streamlined with large tail musculatures. All species of this genus have extensive webbing and large toe discs.
Species
Many of the species have relatively small population sizes, and not much is known about either individual species or the genus as a whole. The following species are recognised in the genus Nyctimystes:
Nyctimystes avocalis Zweifel, 1958 – Loud big-eyed tree frog
Nyctimystes bivocalis Kraus, 2012
Nyctimystes brevipalmatus (Tyler, Martin, and Watson, 1972) – Green-thighed frog
Nyctimystes calcaratus Menzies, 2014
Nyctimystes cheesmani Tyler, 1964 – Cheesman’s big-eyed tree frog
Nyctimystes cryptochrysos Kraus, 2012
Nyctimystes daymani Zweifel, 1958 – Dayman big-eyed tree frog
Nyctimystes disruptus Tyler, 1963 – Madang big-eyed tree frog
Nyctimystes dux (Richards and Oliver, 2006)
Nyctimystes eucavatus Menzies, 2014
Nyctimystes fluviatilis Zweifel, 1958 – Indonesian big-eyed tree frog
Nyctimystes foricula Tyler, 1963 – Kaironk big-eyed tree frog
Nyctimystes gramineus (Boulenger, 1905) – Northern New Guinea treefrog
Nyctimystes granti (Boulenger, 1914) – Grant's big-eyed tree frog
Nyctimystes gularis Parker, 1936 – Mondo big-eyed tree frog
Nyctimystes humeralis (Boulenger, 1912) – Green big-eyed tree frog
Nyctimystes hunti (Richards, Oliver, Dahl, and Tjaturadi, 2006)
Nyctimystes infrafrenatus (Günther, 1867) – White-lipped tree frog
Nyctimystes intercastellus Kraus, 2012
Nyctimystes kubori Zweifel, 1958 – Sandy big-eyed tree frog
Nyctimystes kuduki Richards, 2007
Nyctimystes latratus Menzies, 2014
Nyctimystes lubisi (Oliver, Günther, Tjaturadi, and Richards, 2021)
Nyctimystes montanus (Peters et Doria, 1878) – Mountain big-eyed tree frog
Nyctimystes myolae Menzies, 2014
Nyctimystes multicolor (Günther, 2004) – Multi-coloured tree frog
Nyctimystes narinosus Zweifel, 1958 – Common big-eyed tree frog
Nyctimystes nullicedens (Kraus, 2018)
Nyctimystes obsoletus (Lönnberg, 1900) – Simbang big-eyed tree frog
Nyctimystes ocreptus Menzies, 2014
Nyctimystes pallidofemora (Kraus, 2018)
Nyctimystes papua (Boulenger, 1897) – Papua big-eyed tree frog
Nyctimystes perimetri Zweifel, 1958 – Archipelago big-eyed tree frog
Nyctimystes persimilis (Zweifel, 1958) – Milne big-eyed tree frog
Nyctimystes pterodactyla (Oliver, Richards, and Donnellan, 2019) – Pale-eyed parachuting tree frog
Nyctimystes pulcher (Wandolleck, 1911) – Spurred big-eyed tree frog
Nyctimystes purpureolatus (Oliver, Richards, Tjaturadi, and Iskandar, 2007)
Nyctimystes sanguinolenta (Van Kampen, 1909) – Sabang tree frog
Nyctimystes sauroni (Richards and Oliver, 2006)
Nyctimystes semipalmatus Parker, 1936 – Kokoda big-eyed tree frog
Nyctimystes trachydermis Zweifel, 1983 – Morobe big-eyed tree frog
Nyctimystes traunae Menzies, 2014
Nyctimystes tyleri Zweifel, 1983 – Tyler's big-eyed tree frog
Nyctimystes zweifeli Tyler, 1967 – Zweifel's big-eyed tree frog
References
The IUCN Redlist - Nyctimystes
Barker, J.; Grigg, G.C.; Tyler, M.J. (1995). A Field Guide to Australian Frogs. Surrey Beatty & Sons.
Amphibian genera
Taxa named by Leonhard Stejneger