Axial skeleton composition in the Microhyla–Glyphoglossus assemblage representatives. The vertebral columns are shown in dorsal view for Glyphoglossus molossus (A), Glyphoglossus yunnanensis (B), Microhyla achatina (C), Microhyla nepenthicola (D) and Nanohyla arboricola (E). Numerals (I–VIII) correspond to the numbers of presacral vertebrae (PSV); I+II denotes fusion of the two first PSV. Note: figures display only calcified structures; cartilages are omitted due to limitations of micro-CT scanning. Scale bar equals 3 mm.