===
Angarichthys=== A comparatively large animal from the Middle Devonian of
Siberia, with a head shield estimated around 40 centimeters long. Known only from an infragnathal bone, and an intero-lateral and a marginal plate. ===
Antineosteus=== A primitive homostiid from
Emsian-aged strata of
Morocco.
Antineosteus' primitive anatomical features suggest it may be a precursor to
Angarichthys, Atlantidosteus and
Homosteus.
Antineosteus lived
sympatrically with the Moroccan species of
Atlantidosteus. ===
Atlantidosteus=== This genus is known from species found in Emsian-aged Morocco and Middle Devonian Australia. Overall form is very similar to
Antineosteus and
Homosteus. ===
Cavanosteus=== A primitive genus from Emsian-aged strata of Australia ===
Cathlesichthys=== A
genus of homostiid from
Wee Jasper, living during the Early Devonian. ===
Euleptaspis=== This genus is known from isolated plates and fragments from Lower Devonian-aged strata in
Spitzbergen and
Germany. The holotype of the type species,
E. depressa, is a paranuchal plate very similar to those seen in
coccosteids. ===
Dhanguura?=== A very large, primitive form from the Early Devonian Taemas-Wee Jasper Reef fauna. Its discoverer, Gavin Young, hypothesizes that it may have been a
filter-feeder. ===
Homosteus=== The type genus, known from both complete and fragmentary fossils in Europe, Russia, and North America. ===
Lophostracon=== ===
Luetkeichthys=== ===
Tityosteus===
Tityosteus is thought to be the largest vertebrate known from the Lower Devonian, with an estimated length of 2.5 meters. The holotype is an incomplete individual from the
Hunsrück. == References ==