అంతరించిపోయిన చేప వంటి ఉద్యోగాల సకశేరుకాలు భారీ సాయుధ శరీరం; Paleozik.,

ostracoderm's Usage Examples:

Pycnaspis splendens new genus, new species, a new ostracoderm from the Upper Ordovician of North America.

GM Robertson, Journal of Paleontology, 1945 The ostracoderm order Anaspida, with description of some Upper Silurian material.

the phylum Chordata, subphylum Vertebrata, consisting of both present (cyclostomes) and extinct (conodonts and ostracoderms) species.

"Dentine canals in Cambro-Ordovician ostracoderms and Cretaceous-Eocene pycnodont fish".

bony elements or without, most notably the conodonts, placoderms, and ostracoderms.

Examples: placoderm ("plated skin"); echinoderm ("hedgehog skin"); ostracoderm ("shell skin") deino-: see dino-, deino-.

come to be home to creatures like brachiopods, cephalopods, corals, and ostracoderms.

Like other ostracoderms, Ateleaspis had a head shield.

those days, placoderms were thought to be shelled jawless fish akin to ostracoderms.

Like other ostracoderms, Ateleaspis had a head shield similar to that of Cephalaspis.

that would come to be home to creatures like brachiopods, conodonts, ostracoderms, sharks and trilobites.

are 250 meters thick including siltstone, shale, sandstone, clay and ostracoderm fossils.

rhenanids, while the other suggests that they were actually some sort of ostracoderm agnathans.