Zemes un vides zinātnes Earth and Environment Sciences - Latvijas ...
Zemes un vides zinātnes Earth and Environment Sciences - Latvijas ...
Zemes un vides zinātnes Earth and Environment Sciences - Latvijas ...
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108 ADVANCES IN PALAEOICHTHYOLOGY<br />
Table 1. List of identified taxa from the Pavāri site<br />
Placodermi<br />
Euantiarcha<br />
Bothriolepididae<br />
Bothriolepis ciecere Lyarskaja<br />
Acanthodii<br />
“Devononchus” tenuispinus Gross<br />
“Devononchus” ketleriensis Gross<br />
Acanthodii gen.et sp.indet.<br />
Osteichthyes<br />
Palaeonisci<br />
Palaeonisci gen. et sp. indet.<br />
Sarcopterygii<br />
Porolepiformes<br />
Holoptychius cf. nobilissimus Agassiz<br />
Ventalepis ketleriensis Schultze<br />
Osteolepiformes<br />
Glyptopomus ? bystrowi (Gross)<br />
Cryptolepis grossi Vorobyeva<br />
Dipnoi<br />
Orlovichthys cf. limnatis Krupina<br />
Tetrapoda<br />
Ventastega curonica Ahlberg, Lukševičs et Lebedev<br />
vertebrate occurrence. In 1988 the number of remains for each taxon was documented<br />
already at the outcrop. These data are included in our analysis as well. Both the number<br />
of specimens for each taxa <strong>and</strong> minimum number of individuals (MNI) have been taken<br />
into acco<strong>un</strong>t (Table 2, Fig. 6). The minimum number of individuals has been evaluated<br />
based on the maximum number of identical skeletal parts, e.g. jaws or individual plates<br />
of armour from the same side of the tr<strong>un</strong>k, etc. Only macroremains, including acanthodian<br />
spines, were co<strong>un</strong>ted. Acanthodian scales are quite common; still their number has not<br />
been considered in further analysis as they <strong>un</strong>derwent different regularities of<br />
sedimentation due to the small size of the scales equal to that of s<strong>and</strong> grains. The<br />
material from 1970 <strong>and</strong> 1973 expeditions has been used only for comparison, as the<br />
data on percentage were available only by co<strong>un</strong>ting the specimens in the collection No.<br />
LDM G 81. In 1988 all the specimens were co<strong>un</strong>ted, including those which have not<br />
been included in the museum collection after preparation. Also it is worth noting that<br />
during the 1995 <strong>and</strong> 2001 year expeditions special attention was paid to tetrapod remains.<br />
Therefore tetrapod or sarcopterygian fish remains could be slightly overestimated. As<br />
the preparation of the material collected in 2001 still goes on, the data from this<br />
expedition is not complete <strong>and</strong> therefore excluded from this analysis.<br />
Placoderm Bothriolepis ciecere dominates the vertebrate assemblage of each<br />
individual expedition. All together, placoderms varies between different collection years<br />
in representation from 47% to 97% of the total number of remains. When estimating
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