Xenacanthus

Rarity: Common

The most frequent rarity: most Wikipedia articles become Commons.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Figure

Domain

Nature

Knowledge cost

2

Influence

2

Resistance

4

In collections

Nobody has pulled it yet.

What Wikipedia says

Xenacanthus (from Ancient Greek ξένος, xénos, 'foreign, alien' + ἄκανθος, akanthos, 'spine') is an extinct genus of xenacanthid shark. It lived in freshwater environments, and fossils of various species have been found worldwide.

Excerpt from the Wikipedia article “Xenacanthus”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: See original uncropped file, CC BY-SA 4.0, via Wikimedia Commons.