Phylum: Echinodermata
Class: Echinoidea
Ambulacra (tube feet)
Periproct (opening for anus)
Peristome (opening for mouth)
Pentaradial symmetry (regular echinoids)
Bilateral symmetry imposed upon pentaradial symmetry (irregular echinoids)
Ordovician to Present (Irregular Echinoids from Jurassic to Present)
Grazers with functional jaw apparatus
Long spines for protection and movement
Epifaunal at a wide range of depths
Use tube feet for respiration and movement
Feed on organic matter in sediment, front shaped to funnel sediment into mouth
Use fine spines to move
Infaunal burrowers
Use tube feet for respiration
Grazing echinoids leave a distinctive pentagonal feeding trace Gnathicnus pentax.
Learn about types of preservation
Phylum: Echinodermata
Class: Echinoidea
Ambulacra (tube feet)
Periproct (opening for anus)
Peristome (opening for mouth)
Pentaradial symmetry (regular echinoids)
Bilateral symmetry imposed upon pentaradial symmetry (irregular echinoids)
Ordovician to Present (Irregular Echinoids from Jurassic to Present)
Grazers with functional jaw apparatus
Long spines for protection and movement
Epifaunal at a wide range of depths
Use tube feet for respiration and movement
Feed on organic matter in sediment, front shaped to funnel sediment into mouth
Use fine spines to move
Infaunal burrowers
Use tube feet for respiration
Grazing echinoids leave a distinctive pentagonal feeding trace Gnathicnus pentax.
Learn about types of preservation