Parexus is recognised by its obscenely large anterior dorsal fin spine. Several fossils have been discovered from the Early (Lower) Devonian Period of Tillywhandland, Scotland. Besides P. recurvus, a second species, P. falcatus Powrie, 1870 also from Scotland has also been described.
- Parexus recurvus
- Agassiz, 1845
- Meaning of generic name
- From Greek, parexis, a furnishing, or decoration
- Meaning of specific name
- curved (around itself or backwards) [and falcatus means "with a sickle"]
- Length: 15 cm
- Articulated skeletons.
- Age and Distribution
- Lower Devonian, Tillywhandland, Scotland
- Acanthodii Climatiiformes Climatiidae
- Image by Nobu Tamura (click to enlarge)
Parexus recurvus, November 20, 2008: