Atrypida

Atrypida is an extinct order of rhynchonelliform brachiopods. They first appeared in middle Ordovician and survived the Ordovician-Silurian extinction, becoming the dominant brachiopods of the Silurian alongside the order Pentamerida.^[3][4] They would survive into the Late Devonian before going extinct at the end of the Frasnian (Late Devonian).^[2]

Atrypida Temporal range: Middle Ordovician–Frasnian PreꞒ Ꞓ O S D C P T J K Pg N [1][2]
Atrypa reticularis
Scientific classification
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	Rhynchonellata
Order:	†Atrypida
Families
†Atrypidae †Atrypinidae †Atrypoidea †Carinatinidae †Glassiidae †Karpinskiidae †Kellerellidae †Lissatrypidae †Palaferellidae †Punctatrypidae †Tuvaellidae †Zygospiridae