A new species of miniaturised narrow-mouth frog of the genusMicrohylaTschudi, 1838 (Amphibia: Anura: Microhylidae) from northern Tenasserim, Thailand

Consequences of parallel miniaturisation in Microhylinae (Anura, Microhylidae), with the description of a new genus of diminutive South East Asian frogs

“…11). In species of Nanohyla gen. nov., smaller tubercles and other dermal structures of the skin become flattened and less distinct after fixation and preservation; this has also been reported in other anurans (Poyarkov et al 2015(Poyarkov et al , 2017(Poyarkov et al , 2019Nguyen et al 2018Nguyen et al , 2019Nguyen et al , 2020. It is likely that the presence of the tympanum was artifactually concealed from Bain and Nguyen (2004), since their description was based exclusively on museum specimens.…”

“…This is reminiscent of the patterns seen in Stumpffia Boettger, 1881 frogs from Madagascar, where digit reduction is a hallmark of each major clade, and where the first finger is always the first to reduce (Rakotoarison et al 2017). Unlike Stumpffia, however, even the smallest Microhyla and Nanohyla do not show reduction of the second and fourth fingers, although Microhyla tetrix presents bizarre hand morphology with a particularly thick and long third finger (Poyarkov et al 2020b) reminiscent of the third-finger-only phenotype seen in the smallest Stumpffia species. Also, they have not lost any phalanges, even when fingers are reduced in length, whereas other miniaturized frogs often show finger or toe formula reduction (Alberch andGale 1983, 1985;Scherz et al 2019).…”

“…The genus Microhyla Tschudi, 1838 currently comprises 52 nominal species (Hoang et al 2020;Poyarkov et al 2020aPoyarkov et al , 2020bFrost 2020) and several undescribed candidate species (Gorin et al 2020). It is the second largest microhylid genus after Oreophryne (Frost 2020) and the most species species-rich taxon of the Asian subfamily Microhylinae.…”

Phylogeography of mangrove pit vipers (Viperidae, Trimeresurus erythrurus‐purpureomaculatus complex)

“…cf. purpureomaculatus occurs at the Isthmus of Kra (De Bruyn et al, 2005; Hughes et al, 2003; Parnell, 2013), which serves as a biogeographic divide for numerous vertebrate species including reptiles (Grismer et al, 2022; Mulcahy et al, 2017; Olivier S.G. Pauwels et al, 2016; Trivalairat et al, 2022; van Rooijen & Vogel, 2010; Vogel et al, 2012; Zug et al, 2017), amphibians (Buddhachat & Suwannapoom, 2018; Poyarkov et al, 2020; Yodthong et al, 2014), birds (Hughes et al, 2003; Lim et al, 2020), and mammals (Tougard, 2001). Our results also show that phylogeographic structure is latitudinally stratified and consistent with IBD and IBE, with colour polymorphisms appearing to be latitudinally structured as well.…”

Hidden tribe: A new species of Stream Toad of the genus Ansonia Stoliczka, 1870 (Anura: Bufonidae) from the poorly explored mountainous borderlands of western Thailand

“…The northern Tenasserim Mountain region is nota ble for the recent discoveries of endemic amphibians and reptiles (Matsui 2006;Sumontha et al 2012Sumontha et al , 2017Wilkinson et al 2012;Connette et al 2017;Grismer et al 2016Grismer et al , 2020aGrismer et al , 2020bGrismer et al , 2020cMatsui et al 2018;Pawangkhanant et al 2018;Suwannapoom et al 2018;Lee et al 2019;Chomdej et al 2020Chomdej et al , 2021Poyarkov et al, 2020). The mountains of northern Tenasserim are recognized as one of multiple local centers of amphib ian diversity and endemism in Indochina .…”