(2016) placed Microbrachius next to Bothriolepis
in their cladistic analysis, thereby confirming the above opinions.
canadensis is one species of these extinct fishes.
22) contains the remains of Psammosteus sp., Asterolepis sp., Bothriolepis obrutschewi Gross and ?Eusthenopteron sp.
The assemblage from the uppermost layer of the Devonian deposits in the Borschovo locality, consisting of Psammosteus sp., Asterolepis sp., Bothriolepis obrutschewi and ?Eusthenopteron sp., differs from older assemblages not only in its composition, but also in the state of preservation.
The vertebrate assemblage from the other localities of the Staritsa Beds in the Oredezh River basin usually yields zonal antiarchs Bothriolepis prima Gross (locality close to Yam-Tesovo; other localities mentioned by Ivanov & Lebedev 2011, need confirmation) and B.
livonicus has been discovered both in the lower and upper parts of the Amata RS, where this taxon occurs together with the zonal antiarch species Bothriolepis prima Gross, 1942 and B.
Amata RS, Frasnian, Upper Devonian, Bothriolepis prima-B.
The representation of various skeletal elements of the placoderms Bothriolepis ornata and B.
Also, all the three oryctocoenoses under discussion have similar taxonomic composition which includes placoderms Bothriolepis ornata Eichwald, B.
nobilissimus dominate the assemblage, forming about one third of all identified remains (Tables 2, 3), while placoderms Bothriolepis jani, B.
Bothriolepis ornata dominates the 1st and the 3rd oryctocoenosis (35.3% and 31.3% of all individuals), while the 2nd one is dominated by B.
These are represented by species of arthrodires Coccosteus, Watsonosteus and Plourdosteus and antiarchs Asterolepis and Bothriolepis
. The psammosteid and placoderm fish fossils have been used as characteristic or zonal forms in the Baltic area (Gross 1933, 1942; Sorokin 1981) and on the whole of the East European Platform (Rzhonsnitskaya & Kulikova 1990) since the last century.