Heterostraci

thumb|254px|right|Among the most primitive heterostracans are Tolypelepidida|tolypelepids (top right). Most heterostracans are pteraspidiforms, such as the pteraspidids (bottom right), doryaspidids (bottom left) and the huge psammosteids (top left), which are the youngest known members of the group.

In the Vinony graph

Vinony's link graph records 96 inbound references to Heterostraci, and connects out to Devonian, Agnatha and Pteraspidomorphi.

It sits within the topics Heterostraci and Vertebrate subclasses.

Vinony links it to 21 Wikipedia language editions.

Wikidata facts

Parent taxon: Pteraspidomorphi
Image: Panamintaspis snowi.jpg

Show 6 more facts

taxon rank: subclass
Commons category: Heterostraci
topic's main category: Category:Heterostraci
taxon name: Heterostraci
start time: 433000000-
end time: 359000000-

Sources (1)

wikidata.org

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Encyclopedic overview

8 sections

Contents

Description and anatomy
Taxonomy
Cyathaspidiformes
Pteraspidiformes
Phylogeny
See also
References
External links

Heterostraci (Ancient Greek, ἕτερος+ὄστρακον "those [with] a different shell" [-i is pl. of -us]) is an extinct subclass of pteraspidomorph, ostracoderm, jawless vertebrate that lived primarily in marine and estuary environments. Heterostraci existed from the mid-Ordovician to the conclusion of the Devonian.

Excerpted from Wikipedia’s “Heterostraci” article, available under the CC BY-SA 4.0 licence.