Philippine lizards of the family Gekkonidae comprise 49 species (Taylor, 1915, 1922; Brown and Alcala, 1978) in 10 genera: Gehyra (1), Gekko (13), Hemidactylus (5), Hemiphyllodactylus (2), Lepidodactylus (6), Luperosaurus (8), Ptychozoon (1), Pseudogekko (4), and Cyrtodactylus (9), (Brown et al., 2007, 2010a, 2011; Welton et al., 2009, 2010a, 2010b; Zug, 2011). An amazing percentage of these species are endemic to the Philippines archipelago (roughly 85%; Brown et al., 2011). Several of the recently described gekkonids in the Philippines were discovered only recently as part of ongoing surveys around the archipelago. Recent phylogenetic studies focused on Philippine gekkonids (Siler et al., 2010; Welton et al., 2010a,b) have resulted in the observation of high levels of genetic diversity among populations of widespread species, an indication that the country's gecko diversity may still be greatly underestimated.
The genus Pseudogekko presently contains four species, all endemic to the Philippine islands (Pseudogekkobrevipes, Pseudogekkocompressicorpus, Pseudogekkosmaragdinus, Pseudogekkointermedium). Species in this genus are easily diagnosed from all other Philippine gecko species due to their long, slender, delicate body forms. All species appear to prefer arboreal habitats and are often found on leaves of saplings, trees, or aerial ferns. Specimens of most species remain rare in collections. Body coloration is quite variable both between species and between island populations within species, with Pseudogekko smaragdinustaking the prize for the most brilliant color pattern (neon yellow to green body). Although the diversity in the genus is currently recognized to be low, it is quite possible that widespread species are actually complexes of morphologically similar but distinct lineages.