Plourdosteus livonicus (Eastman), antiarch Asterolepis sp.
Taxonomy of the arthrodire Phlyctaenius from the Lower or Middle Devonian of Campbellton, New Brunswick, Canada.
The so-called 'Atholville Beds' (Dineley and Williams 1968), exposed at Campbellton and Atholville, have been examined by paleontologists since 1881 and have yielded ostracoderms, arthrodires, acanthodians and chondrichthyans (Whiteaves 1881, 1889; Woodward 1889, 1892; Traquair 1890, 1893).
The first data about placoderms from Plucki were presented by Ivanov & Ginter (1997) who initially described a partly preserved skull-roof of an eastmanosteid arthrodire.
The limestone middle part (up to 10 cm) is rich in cephalopods and arthrodire placoderms.
A new species of eastmanosteid arthrodire (Pisces: Placodermi) from Gogo, Western Australia.
Grishin of the Geological Institute of the Russian Academy of Sciences (GIN RAS) presented a postcranial bone of an arthrodire placoderm to the Borissiak Paleontological Institute of RAS (PIN RAS).
They found two more arthrodire specimens in the same quarry.
As the lower part of the Razvedochnyj Fm is of Pragian age (Matukhin 1995), the age of the arthrodire can provisionally be considered as Pragian.
Another aspect is also significant: the sclerotic plates may be either thin as probably in Eukaia, also in the large and specific arthrodire Carolowilhelmina (Mark-Kurik & Carls 2002, fig.
These are represented by species of arthrodires Coccosteus, Watsonosteus and Plourdosteus and antiarchs Asterolepis and Bothriolepis.
Noteworthy is the absence of the characteristic Middle Devonian arthrodires Homostius and Heterostius (Mark-Kurik & Nemliher 2003).