Definition of Heterostracans. Meaning of Heterostracans. Synonyms of Heterostracans

- Devonian. The heterostracans differed from other Paleozoic agnathan taxa both in the arrangement and histology of their scales. Most heterostracans had two...
- groups, the more primitive heterostracans and the cephalaspids. The cephalaspids were more advanced than the heterostracans in that they had lateral stabilizers...
- by a small fin web. This tail structure clearly differs from that of heterostracans, which are currently grouped with arandaspids and astraspids in the...
- ventral plate forming the edges of the mouth suggest that pteraspidiform heterostracans were filter-feeders that selectively filtered specific sized plankton...
- (1995). "The Downtonian and Devonian vertebrates of Spitsbergen. *. New Heterostracans from the Lower Devonian Red Bay Group, northern Spitsbergen". Polar...
- with all amphiaspids, siberiaspids are easily distinguished from other heterostracans in that all of the plates of the cephalothorax armor are fused into...
- to that of heterostracans that to that of astraspids. This is the only argument to place them, as the closest relatives to heterostracans, among the Ordovician...
- Glinskiy, Vadim (2017). "Phylogenetic relationships of psammosteid heterostracans (Pteraspidiformes), Devonian jawless vertebrates". Biological Communications...
- skeleton, they were first regarded as heterostracans. Now, we know that they are widely different from heterostracans, in particular in retaining about ten...
- hypersaline lagoons. All amphiaspids are easily distinguished from other heterostracans in that all of the plates of the cephalothorax armor are fused into...