swap_horiz Atops Alternatives

1

Dikelocephalus

Dikelocephalus is a large Late Cambrian trilobite genus known from Wisconsin, USA, including material from the St. Lawre...

Large North American Ptychopariida Late Cambrian

7.0 Good

2

Crepicephalus

Crepicephalus is an extinct genus of trilobites from the Late Cambrian of North America. It belongs to the broader group...

North American Ptychopariida Late Cambrian Zone Fossil

6.2 Fair

3

Ptychaspis

Ptychaspis is a genus of Late Cambrian trilobites from North America. It belongs to the family Ptychaspididae and is ass...

North American Late Cambrian Zone Fossil Ptychaspidida

6.0 Fair

4

Elvinia

Elvinia is a genus of Late Cambrian trilobites known from North America. It belongs to the family Elvinidae and provides...

North American Ptychopariida Late Cambrian Zone Fossil

6.0 Fair

5

Saukia

Saukia is a genus of Late Cambrian trilobites in the family Saukiidae. Fossils assigned to the genus are known from Nort...

North American Ptychopariida Late Cambrian Zone Fossil

6.0 Fair

6

Cedaria

Cedaria is a genus of Late Cambrian trilobites and the name-bearing taxon for the Cedaria Biozone. This biozone is a bio...

North American Ptychopariida Late Cambrian Zone Fossil

6.0 Fair

7

Irvingella

Irvingella is an extinct genus of Late Cambrian trilobites. Fossils attributed to the genus have been reported from seve...

North American Ptychopariida Late Cambrian Zone Fossil

5.8 Mediocre

8

Bonnia

Bonnia is an extinct genus of Middle Cambrian trilobites known from marine rocks in North America. Its fossils occur in...

Small North American Cambrian Ptychopariida

5.8 Mediocre

9

Alokistocare

Alokistocare is an extinct genus of marjumiid trilobites from the Middle Cambrian. Its fossils are known from marine car...

North American Cambrian Ptychopariida Zone Fossil

5.8 Mediocre

10

Ehmaniella

Ehmaniella is an extinct genus of marjumiid trilobites from the Middle Cambrian. It is known from North American marine...

Small North American Cambrian Ptychopariida

5.8 Mediocre

11

Saratogia

Saratogia is a genus of Late Cambrian saukiid trilobites known from North America. Early specimens were described from N...

North American Ptychopariida Late Cambrian Zone Fossil

5.5 Mediocre

12

Parabolina

Parabolina is a genus of Late Cambrian trilobites in the family Olenidae. Species assigned to the genus are known partic...

Scandinavian Ptychopariida Late Cambrian Olenidae

5.5 Mediocre

13

Aphelaspis

Late Cambrian trilobite defining the Aphelaspis biozone, a key stratigraphic marker for the Steptoean Stage in the North...

North American Ptychopariida Late Cambrian Zone Fossil

5.3 Mediocre

14

Pterocephalia

Pterocephalia is an extinct genus of Late Cambrian trilobites assigned to the family Pterocephaliidae. Fossils are known...

North American Ptychopariida Late Cambrian Zone Fossil

5.2 Mediocre

15

Parabolinella

Parabolinella is a genus of Cambrian trilobites in the family Olenidae. It is closely related to Parabolina and is known...

Scandinavian Ptychopariida Late Cambrian Olenidae

5.2 Mediocre

16

Dunderbergia

Dunderbergia is a Late Cambrian trilobite from the Great Basin of Nevada, USA, named after Dunderberg Peak in the Eureka...

Small North American Ptychopariida Late Cambrian

5.2 Mediocre

17

Taenicephalus

Taenicephalus is an extinct genus of Upper Cambrian trilobites in the family Parabolinoididae. Its type species, Taenice...

North American Ptychopariida Late Cambrian Illaenidae

5.0 Mediocre

18

Chancia

Chancia is an extinct genus of Middle Cambrian trilobites classified in the order Ptychopariida and the family Alokistoc...

Small North American Cambrian Ptychopariida

5.0 Mediocre

19

Eurekia

Eurekia is an extinct genus of asaphid trilobites placed in the family Eurekiidae. It is known from Late Cambrian and ea...

Small North American Ptychopariida Late Cambrian

5.0 Mediocre

20

Maryvillia

Maryvillia is an extinct genus of Upper Cambrian trilobites in the family Kingstoniidae, within the order Ptychopariida....

Small North American Ptychopariida Late Cambrian

4.8 Poor