swap_horiz Mesonacis Alternatives

1

Phacops rana

Phacops rana is an iconic Devonian trilobite found primarily in eastern North America. Its exceptionally large, compound...

Iconic North American Devonian Phacopida

9.3 Excellent

2

Phacops

A Devonian trilobite with distinctive schizochroal compound eyes, used by paleontologist Niles Eldredge in the 1970s as...

Iconic North American Devonian Phacopida

8.7 Great

3

Arctinurus

Large Silurian trilobite from the Rochester Shale of New York State, notable for its distinctive stellate outline and fr...

Large North American Silurian Lichida

8.5 Great

4

Paradoxides davidis

A large Middle Cambrian trilobite from Wales, one of the earliest trilobite species formally described from the British...

Large British Cambrian Redlichiida

8.5 Great

5

Isotelus

A large Ordovician trilobite from North America; Isotelus rex from Manitoba, Canada, ranks among the largest trilobites...

Smooth North American Ordovician Asaphida

8.3 Great

6

Olenellus

An Early Cambrian trilobite from North America and Greenland that lacks facial sutures and defines the Olenellus biozone...

North American Primitive Early Cambrian Olenellida

7.5 Good

7

Redlichia

An Early Cambrian trilobite from Australia and Asia that serves as an index fossil for lower Cambrian deposits, with a d...

Asian Gondwana Redlichiida Early Cambrian

7.0 Good

8

Fallotaspis

One of the earliest known trilobite genera, from the Early Cambrian of Morocco and North America, critical for understan...

Moroccan Primitive Redlichiida Early Cambrian

6.8 Fair

9

Eoredlichia

An early Cambrian redlichiid trilobite from South China, among the earliest well-documented trilobites and significant f...

Chinese Primitive Redlichiida Early Cambrian

6.8 Fair

10

Bathynotus

An early Cambrian trilobite known from South China and other Cambrian Stage 2 deposits, representing one of the stratigr...

Chinese Primitive Redlichiida Early Cambrian

6.5 Fair

11

Callavia

An early Cambrian olenellid trilobite from Newfoundland, Canada, namesake of the Callavia biozone and a key marker for l...

North American Primitive Redlichiida Early Cambrian

6.5 Fair

12

Protolenus

An early Cambrian trilobite found in Moroccan and Iberian deposits, belonging to the paradoxidid-related group and used...

Moroccan Primitive Redlichiida Early Cambrian

6.5 Fair

13

Holmia

An early Cambrian trilobite from Scandinavia, namesake of the Holmia biozone used to correlate lower Cambrian strata acr...

Scandinavian Primitive Early Cambrian Olenellida

6.5 Fair

14

Wanneria

An Early Cambrian olenellid trilobite from North America, among the earliest trilobites recorded in the fossil sequence...

North American Primitive Early Cambrian Olenellida

6.2 Fair

15

Nephrolenellus

Early Cambrian olenellid trilobite from western North America, distinguished by its elongated axial lobe and reduced pyg...

North American Primitive Early Cambrian Olenellida

6.2 Fair

16

Bristolia

Early Cambrian olenellid trilobite endemic to western North America, particularly Nevada and California, notable for its...

North American Long Spines Early Cambrian Olenellida

6.2 Fair

17

Kjerulfia

An early Cambrian trilobite from Norway and Sweden, known from lower Cambrian deposits of Scandinavia and associated wit...

Scandinavian Primitive Early Cambrian Olenellida

6.0 Fair

18

Yunnanocephalus

A Cambrian trilobite genus from Yunnan Province, China, known from Early to Middle Cambrian strata and representative of...

Chinese Primitive Cambrian Redlichiida

5.5 Mediocre

19

Bergeroniellus

Early Cambrian trilobite serving as a key biostratigraphic index fossil for Atdabanian-age strata in Siberia and other C...

Siberian Redlichiida Early Cambrian Zone Fossil

5.0 Mediocre

20

Paedeumias

Middle Cambrian ptychopariid trilobite from North America, known from deposits in the western United States and Canada.

North American Primitive Early Cambrian Olenellida

5.0 Mediocre