[2] A recent phylogenetic analysis confirmed this conclusion, and further suggested that Thoraciliacus rostriceps is more closely related to Pipidae and Shelaniinae than to Palaeobatrachus.

[3] Fossils of T. rostriceps were found in Makhtesh Ramon, Negev Desert, Israel and it is believed they lived during the Barremian.

[4] Other fossils have been found near Marydale, South Africa in an Upper Cretaceous lake.

[4][5] Thoraciliacus rostriceps was a small frog, 32 millimetres (1.3 in) in length, with a large head.

[6] Like its close relative Nevobatrachus gracilis, T. rostriceps was highly aquatic evidenced by its flat skull, short axial column and long metapodials.