Muutumatutidae

Muutumatutidae is a family of extinct ray-finned fishes that lived during the Triassic period. Fossil evidence suggests these fish were primarily found in freshwater environments. Their exact phylogenetic placement within the Actinopterygii is still a subject of scientific study, but they are generally considered to belong to an early radiation of teleostean fishes.

The fossil record for Muutumatutidae is relatively sparse, with discoveries predominantly from lagerstätten that preserve fine details of skeletal structure. These fossils indicate a body shape that was likely adapted for life in rivers or lakes, possibly with adaptations for navigating through aquatic vegetation or for pursuing prey. Anatomical features that have been identified include specific arrangements of fin rays and scales, as well as characteristics of their jaw and dental structure.

The ecological role of Muutumatutidae within Triassic ecosystems is not well understood due to limited fossil material. However, based on their morphology, they may have been predatory or omnivorous. The study of Muutumatutidae contributes to our understanding of early fish evolution during the Mesozoic Era and provides insights into the diversification of ray-finned fishes following the Permian-Triassic extinction event. Further discoveries are needed to fully elucidate the biology and evolutionary history of this extinct fish family.