Encyclopedia

Placodermi

Also found in: Dictionary, Medical, Wikipedia.

Placodermi

[‚pla·kə′dər·mē]
(paleontology)
A large and varied class of Paleozoic fishes characterized by a complex bony armor covering the head and the front portion of the trunk.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Placodermi

 

a class of extinct fishes that lived during the Devonian. Their length was up to 5–6 m. The head and anterior part of the trunk were covered with an armor of bony plates of cutaneous origin. The plates were nodular and ridged. The head and trunk sections of the armor were articulated, and the jaws consisted of pointed bony plates. There were two subclasses: Arthrodira and Antiarchi (which included the genus Bothriole-pis).

REFERENCE

Drushits, V. V., and O. P. Obrucheva. Paleontologiia, 2nd ed. [Moscow] 1971.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
Mentioned in
References in periodicals archive
Suur Hilis-Devoni artrodiir (Vertebrata, Placodermi) Poolast
On kirjeldatud Placodermi klassi kuuluvat artrodiiri Dunkleosteus sp., kelle jaanukid leiti Ulem-Devoni (Frasnesi) nn Kellwasseri taseme kivimitest Plucki paljandist Swietokrzyskie magedest Poolast.
A large Late Devonian arthrodire (Vertebrata, Placodermi) from Poland
Buchanosteids (Placodermi, Arthrodira) from Central Asia.
Dolganosteus, a new Early Devonian rhenanid (Placodermi) from northern Siberia.
A new lower Devonian arthrodire (Placodermi) from the NW Siberian Platform/Uus alam-Devoni artrodiir (Placodermi) Siberi Platvormi loodeosast
Copyright © 2003-2025 Farlex, Inc Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.