placoderm in English

noun
1
an extinct fish of the Devonian period, having the front part of the body encased in broad flat bony plates.
Such giant cephalopods play or played a similar ecological role of top predator to that of Devonian arthrodire placoderms , Mesozoic pliosaurs and Cenozoic toothed whales.

Use "placoderm" in a sentence

Below are sample sentences containing the word "placoderm" from the English Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "placoderm", or refer to the context using the word "placoderm" in the English Dictionary.

1. Extraordinary evidence of internal fertilization in a placoderm was afforded by the discovery in the Gogo Formation, near Fitzroy Crossing, Kimberley, Western Australia, of a small female placoderm, about 25 cm (10 in) in length, which died in the process of giving birth to a 6 cm (2 1⁄2 in) offspring and was fossilized with the umbilical cord intact.

2. The remaining species then died out during the Devonian/Carboniferous extinction event; not a single placoderm species has been confirmed to have survived into the Carboniferous.

3. The presence of osteostracan, Anaspid, thelodont, acanthodian and possible placoderm remains in the Eastport Formation of Maine mirrors the vertebrate fauna known elsewhere in the Lower Old Red Sandstone of eastern North America and Europe (e.g., Denison 1956; the 'Cephaslaspid province of Young 1981; the North Atlantic province of Dineley and Loeffler 1993; and the 'central Appalachian …