Palaeospondylus: Smallest Vertebrate Fish
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smallest vertebrate fossil animalPhys Org
•Science
Science
A 380-million-year-old fossil 'fish' from Scotland has been discovered in Australia
87% Informative
Palaeospondylus is the smallest vertebrate fossil animal described so far from Australia .
It lived in the shallow margins of a marine environment about 400 million years ago .
Unlike nearly all fossil fish of that age, it was "naked," lacking external dermal bones and scales.
It is the oldest example from the fossil record to show a segmented vertebral column.
The unique uncrushed preservation of this braincase provides the first details of brain structure in this tiny animal from 400 million years ago .
The honeycomb tissue seems unique to Palaeospondylus , but could be a precursor to calcified cartilage of some other groups, including modern sharks.
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