Barinya wangala

Overview

Barinya wangala is a dasyuromorphian known from Miocene Riversleigh. Its skull, jaws, and teeth provide clues to relationships with other extinct and living groups. Researchers have sought its relatives by fitting together multiple features of its small head.^[1]

Key facts

The reference specimen QM F31408 is a nearly complete skull. Other specimens preserve lower jaws, canines, premolars, and molars. Different parts of the head can be compared across this material.^[1]

Time and place

It was reported from Miocene material at Riversleigh in northwestern Queensland, present-day Australia. The fossil database’s stratigraphic summary indicates approximately 23–16 million years ago. It appears in research comparing the ancient mammals of Riversleigh.^[1][4]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

The nearly complete reference skull, another skull QM F31409, and lower jaw QM F23889 have been studied. The jaw includes several teeth from the canine to the molars. Understanding this animal involves examining multiple cranial and dental features together, beyond a first impression of a single part.^[1]

Barinya wangala is estimated to have been a small marsupial weighing approximately 200–400 g. A 2025 study presented this size range while comparing it with other marsupials from the same region.^[5]

Habitat and reproduction

Do similar teeth imply similar diets or close relationships? Similarities between the premolars of Barinya and Malleodectes were used to discuss their relationships and possible convergence. Structures for processing food suggest ways of life while also raising questions about ancestry.^[3]

Fossil discovery

A 1999 paper discussed four cranial features shared with living dasyurids. Further studies in 2016 and 2025 compared its relationships with other groups. This is a case in which the search for its place among relatives has continued beyond the initial discovery.^[1][3][2]

References

1. 1999 study — Barinya from Riversleigh
2. 2025 study — Classification of Barinya and related groups
3. 2016 study — Comparing Barinya and Malleodectes
4. Paleobiology Database — Stratigraphic records of Barinya fossils
5. 2025 · Comparing malleodectids and small marsupials from Riversleigh
6. Flinders University VAMP — Fossil lower jaw of Wakaleo oldfieldi

Research questions

The group in which Barinya is placed has varied between studies. New analyses propose different family trees depending on which cranial and dental features are compared together. Following these differences reveals the process by which classifications are developed.^[1][3][2]

Observation

Examine the outline of the head and the row of teeth in the jaw separately. Considering the sequence from the canine to the rear molars helps explain why researchers compare several teeth individually.^[1]