''Aphantophryne nana'' is a species of frog in the family

Microhylidae The Microhylidae, commonly known as narrow-mouthed frogs, are a geographically widespread family of frogs. The 683 species are in 63 genera and 11 subfamilies, which is the largest number of genera of any frog family. Evolution A molecular phylo ...

. It is endemic to the Philippines and is known with certainty only from the island of Camiguin. It is unclear whether similar frogs from northeast Mindanao are referable to this species. It was described as ''Oreophryne nana'', but based on molecular data it was moved to ''Aphantophryne'' in 2017. Common names Camiguin cross frog, Camiguin narrow-mouthed frog, and volcano cross frog have been coined for the species.

Description

''Aphantophryne nana'' are small, moderately slender-bodied frogs. Adult females in the

type series In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the ...

measure in snout–vent length; no males were collected. The head is broader than it is long. The snout is short and bluntly round–pointed. The canthus rostralis is rounded. The tympanum is distinct. The fingers and the toes are dilated into moderately large disks (with the exception of the first finger). Skin is smooth. Preserved specimens are dusky brown, apart from the blackish snout, upper eyelids, and axillary and loreal regions. ''Aphantophryne nana'' differs from ''

Aphantophryne anulata ''Aphantophryne'' is a genus of microhylid frogs found in New Guinea and in Mindanao, the Philippines. Originally described by Fry in 1917, Richard G. Zweifel considered in 1956 ''Aphantophryne'' synonymous to ''Cophixalus''. The genus was resurr ...

'' by the absence of subarticular tubercles on the hand, but the diagnostic value of this character has been questioned because specimens from Mindanao show a variable degree of distinctiveness for this trait.

Habitat and conservation

''Aphantophryne nana'' occurs in mossy and montane rainforests. The types were collected in dipterocarp forest at elevations between

above sea level Height above mean sea level is a measure of the vertical distance (height, elevation or altitude) of a location in reference to a historic mean sea level taken as a vertical datum. In geodesy, it is formalized as ''orthometric heights''. The comb ...

. Eggs presumably belonging to this species have been found under mosses. Development is direct, without a free-living tadpole stage. ''Aphantophryne nana'' is rare on Camiguin. Shifting agriculture and illegal logging threaten its habitat at lower altitudes.

References

{{Taxonbar, from=Q2276635 nana Endemic fauna of the Philippines Amphibians of the Philippines Fauna of Camiguin Amphibians described in 1967 Taxa named by Walter Creighton Brown Taxonomy articles created by Polbot