Helios |
Helios aranaides
|
Nd |
Silurian |
|
Conochitina |
Conochitina minnesotensis
|
Nd |
Silurian |
|
Desmochitina |
Desmochitina minor
|
Nd |
Silurian |
|
Cyathochitina |
Cyathochitina kuckersiana
|
Nd |
Silurian |
|
Polyedryxium |
Polyedryxium sp
|
Nd |
Devonian |
|
Polyedryxium |
Polyedryxium pharaone
|
Nd |
Devonian |
|
Angochitina |
Angochitina bifurcata
|
Nd |
Devonian |
|
Urochitina |
Urochitina simplex
|
Nd |
Devonian |
|
Ancyrochitina |
Ancyrochitina fragilis
|
Nd |
Devonian |
|
Sphaerochitina |
Sphaerochitina cuvillieri
|
Nd |
Devonian |
|
Nannoceratopsiella |
Nannoceratopsiella
|
Nd |
Permian |
|
Staplinium |
Staplinium hexaeder
|
Nd |
Triassic |
|
Nannoceratopsis |
Nannoceratopsis
|
Nd |
Jurassic |
|
Nannoceratopsis |
Nannoceratopsis gracilis
|
Nd |
Early Jurassic |
|
Dapcodinium |
Dapcodinium priscus
|
Nd |
Early Jurassic |
|
Gonyaulacysta |
Gonyaulacysta jurassica
|
Nd |
Late Jurassic |
|
Tenua |
Tenua sp
|
Nd |
Late Jurassic |
|