swap_horiz Alokistocare Alternatives

1

Elrathia

A Middle Cambrian trilobite from the Wheeler Shale of Utah, USA, so abundantly preserved that it is among the most comme...

Utah North American Cambrian Abundant

7.5 Good

2

Dikelocephalus

Dikelocephalus is a large Late Cambrian trilobite genus from Wisconsin, USA, notable for its size and abundance in the S...

Large North American Ptychopariida Late Cambrian

7.0 Good

3

Crepicephalus

Crepicephalus is a Late Cambrian trilobite genus from North America that serves as the namesake of the Crepicephalus Bio...

North American Ptychopariida Late Cambrian Zone Fossil

6.2 Fair

4

Kootenia

Middle Cambrian corynexochid trilobite distributed across North America and Asia, commonly found in deposits contemporan...

North American Cambrian Corynexochida Zone Fossil

6.2 Fair

5

Elvinia

Elvinia is a Late Cambrian trilobite genus from North America used as an index fossil for the Elvinia Biozone in the upp...

North American Ptychopariida Late Cambrian Zone Fossil

6.0 Fair

6

Saukia

Saukia is a Late Cambrian trilobite genus belonging to family Saukiidae, found in North America and Asia, and associated...

North American Ptychopariida Late Cambrian Zone Fossil

6.0 Fair

7

Glossopleura

Middle Cambrian trilobite abundant in North America that gives its name to the Glossopleura biozone, a key interval in r...

North American Cambrian Corynexochida Zone Fossil

6.0 Fair

8

Bathyuriscus

Middle Cambrian trilobite widespread across North America, serving as a key index fossil for the Bathyuriscus-Elrathina...

North American Cambrian Corynexochida Zone Fossil

6.0 Fair

9

Cedaria

Late Cambrian trilobite that defines the Cedaria biozone, a key division in Upper Cambrian stratigraphy widely used for...

North American Ptychopariida Late Cambrian Zone Fossil

6.0 Fair

10

Irvingella

Irvingella is a Late Cambrian trilobite genus valued for intercontinental biostratigraphic correlation, with occurrences...

North American Ptychopariida Late Cambrian Zone Fossil

5.8 Mediocre

11

Bonnia

A Middle Cambrian trilobite from North America, known from Cambrian strata of the western United States and used in regi...

Small North American Cambrian Ptychopariida

5.8 Mediocre

12

Judomia

Cambrian trilobite from Siberia used as an index fossil for the Botomian Stage, aiding global correlation of Lower Cambr...

Siberian Cambrian Ptychopariida Zone Fossil

5.8 Mediocre

13

Ehmaniella

Middle Cambrian marjumiid trilobite from North America whose fossils serve as index fauna for stratigraphic zones in the...

Small North American Cambrian Ptychopariida

5.8 Mediocre

14

Saratogia

Late Cambrian saukiid trilobite from North America, with early specimens described from New York State, used in Upper Ca...

North American Ptychopariida Late Cambrian Zone Fossil

5.5 Mediocre

15

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

16

Dorypyge

Middle Cambrian corynexochid trilobite found in North America and Asia, recognized by its distinctive elongated pygidium...

North American Cambrian Corynexochida Zone Fossil

5.2 Mediocre

17

Pterocephalia

Late Cambrian trilobite from North America of the family Pterocephaliidae, known for its broad pygidium bearing prominen...

North American Ptychopariida Late Cambrian Zone Fossil

5.2 Mediocre

18

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

19

Atops

A Late Cambrian trilobite genus from North America, classified within the order Ptychopariida and known from Upper Cambr...

Small North American Ptychopariida Late Cambrian

5.2 Mediocre

20

Chancia

Upper Cambrian trilobite from North America known from Franconian Stage deposits, used in biostratigraphic correlation o...

Small North American Cambrian Ptychopariida

5.0 Mediocre