Zemes un vides zinātnes Earth and Environment Sciences - Latvijas ...

110 ADVANCES IN PALAEOICHTHYOLOGY
Fig. 7. Number of fossils of different size from the Pavāri locality. A, for all measured specimens.
B, estimated for the dorsal wall of the trunk shield of Bothriolepis. C, generalized reconstruction
of Bothriolepis in dorsal view.
the minimum number of individuals (MNI) of Bothriolepis ciecere, based on the number
of left PVL’s, their relative percentage is even higher. Holoptychius cf. nobilissimus is
the second most widespread taxon according to specimen occurrence, which is more
than one tenth of the total number. The minimum number of individuals based on the
number of right clavicles, however, is smaller than in Ventastega curonica. The remains
of Cryptolepis grossi are just slightly less common, while the estimated MNI based on
the number of right lower jaws is the same as for Holoptychius. Ventastega curonica
lies among the species which are comparatively common, and the estimated MNI based
on the number of right lower jaws indicates that Ventastega individuals are the second
most common taxa in the oryctocoenosis. It is possible that the differences between the
total number of remains and the MNI can be explained by the fact that both Holoptychius
and Cryptolepis are represented mainly by scales, while bones of the head, jaws and
bones of the shoulder girdle are found more rarely if compared to those in Ventastega.
The number of remains belonging to the rest of taxa is small.
Age specific distribution. The age of the fossil individuals by the time they died can
be estimated only for taxa represented by a greater number of specimens, e.g.