Paleontologists from Australia and China have conducted two groundbreaking studies on the fossilized remains of a remarkable Devonian lungfish. Utilizing advanced imaging technology, they have unearthed previously overlooked anatomical details, significantly enhancing our understanding of early vertebrate evolution. Their findings have been published in the Canadian Journal of Zoology and the journal Current Biology.
Paleolophus yunnanensis, a unique lungfish species that thrived in southern China’s waters 410 million years ago. Image credit: Brian Choo, Flinders University.
In a recent study, lead researcher Alice Clement, a paleontologist at Flinders University, investigates The Mystery of Kainokara, a fossil known from a single specimen found in the Late Devonian Gogo Formation of Western Australia.
“New research, including the analysis of previously neglected specimens, is gradually uncovering the rich diversity of lungfishes found in Australia’s significant fossil sites,” said Dr. Clement.
“One particularly enigmatic specimen originates from Australia’s earliest ‘Great Barrier Reef’, a Devonian reef located in the Kimberley region of northern Western Australia.”
“When first described in 2010, this unusual specimen was so perplexing that the authors speculated it might represent an entirely new type of fish never documented in science.”
“Using advanced scanning techniques, we developed comprehensive digital images of both the external and internal structures of the skull, revealing the complexity of this fascinating lungfish’s brain cavity.”
“In fact, we confirmed that earlier interpretations may have been from an upside-down perspective.”
“We were also able to compare the well-preserved inner ear region with other lungfishes,” noted Flinders University paleontologist Hannah Thiele.
“This provides an essential data point in the rich collection of lungfish and early vertebrate species.”
“This research enhances our understanding of the evolutionary progression of these ancient lobe-finned fishes, both in Gondwana and globally.”
In a separate study, Flinders University paleontologist Brian Chu and colleagues reveal a newly discovered species of lungfish from the Devonian period in China, Paleolophus yunanensis.
“The discovery of Paleolophus yunanensis offers unprecedented insight into the transitional phase between the early appearance of lungfish and their extensive diversification millions of years later,” said Dr. Chu.
“At this time, this group was just beginning to develop unique feeding adaptations that would serve them well throughout the remainder of the Devonian period and into the present.”
“Lungfish, including the ancient lineage found in Queensland, Australia, have fascinated researchers due to their close evolutionary relationship with tetrapods, the four-limbed vertebrates that include humans.”
“The distinctive skull of the newly discovered lungfish from 410-million-year-old rock formations in Yunnan offers crucial insights into the rapid evolutionary changes during the Early, Middle, and Late Devonian periods.”
“The new specimens exhibited both similarities and differences compared to the earliest known specimens, such as Diabolepis fossils from southern China and uranolophus found in locations like Wyoming and Australia.
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Hannah S. Thiele et al., deciphering The Mystery of Kainokara from the Late Devonian Gogo Formation, Australia. Canadian Journal of Zoology, published online January 28, 2026. doi: 10.1139/cjz-2025-0109
Tuo Qiao et al., 2026. New fish fossil sheds light on the rapid evolution of early lungfish. Current Biology 36 (1): 243-251; doi: 10.1016/j.cub.2025.11.032
Source: www.sci.news
