Heteractinida
id:
heteractinida-323-16334170
title:
Heteractinida
text:
Heteractinida is an extinct grade of Paleozoic (Cambrian–Permian) sponges, sometimes used as a class or order. They are most commonly considered paraphyletic with respect to Calcarea, though some studies instead argue that they are paraphyletic relative to Hexactinellida. Heteractinids can be distinguished by their six-pronged (snowflake-shaped) spicules, whose symmetry historically suggested a relationship with the triradial calcarean sponges. The sponge-like Cambrian Hetairacyathidae may be re
brand slug:
wiki
category slug:
encyclopedia
description:
Group of sponges
original url:
https://en.wikipedia.org/wiki/Heteractinida
date created:
date modified:
2024-03-15T17:08:08Z
main entity:
{"identifier":"Q16910350","url":"https://www.wikidata.org/entity/Q16910350"}
image:
fields total:
13
integrity:
14