swap_horiz Primaspis Alternatives

1

Isotelus maximus

Known from Late Ordovician rocks in eastern North America, Isotelus maximus was a large asaphid trilobite. Its broad, fl...

Large Ohio Ordovician Asaphida

9.05 Excellent

2

Cyclopyge

Exceptionally large compound eyes distinguish Cyclopyge, a genus of Ordovician trilobites. The eyes occupy much of the s...

Pelagic Rare Ordovician Asaphida

8.88 Great

3

Carolinites

Carolinites is a genus of Ordovician trilobite characterized by very large compound eyes that provided a broad field of...

Pelagic Rare Ordovician Asaphida

8.62 Great

4

Neoasaphus

Neoasaphus is a type of trilobite fossil belonging to the Asaphida order and Asaphidae family. Primarily found in Ordovi...

Russian Ordovician Asaphida Asaphidae

8.46 Great

5

Isotelus rex

Isotelus rex is a remarkably large species of trilobite belonging to the Asaphida order. Recovered from Ordovician-age r...

Canadian Ordovician Asaphida Asaphidae

8.37 Great

6

Neoasaphus kowalewskii

Neoasaphus kowalewskii is a fossil trilobite discovered in Russia’s Ordovician deposits. This species is notable for its...

Russian Iconic Ordovician Asaphida

8.28 Great

7

Ceratonurus

Devonian odontopleurid trilobite with a distinctive elongated pygidium bearing prominent terminal spines, found in Devon...

Rare Spiny Ordovician Odontopleurida

8.18 Great

8

Asaphus

Asaphus is a genus of trilobite from the Ordovician period, belonging to the family Asaphidae, with fossils primarily fo...

Russian Smooth Ordovician Asaphida

7.91 Good

9

Isotelus

Isotelus is an extinct genus of large asaphid trilobite that lived during the Ordovician period. It possessed a smooth,...

Smooth North American Ordovician Asaphida

7.64 Good

10

Cryptolithus

Cryptolithus is an extinct genus of trinucleid trilobite that lived during the Ordovician period. It is distinguished by...

Blind North American Ordovician Trinucleida

7.64 Good

11

Gabriceraurus

Gabriceraurus is an extinct genus of cheirurid trilobite that lived during the Ordovician period. Fossils are known from...

Rare North America Spiny Ordovician

7.32 Good

12

Trinucleus

Trinucleus is an extinct genus of trilobites that thrived during the Ordovician period, with fossils primarily located i...

Blind British Ordovician Trinucleida

7.18 Good

13

Raphiophorus

Raphiophorus is an extinct genus of trilobites that existed during the Ordovician and Silurian geological periods. As a...

Blind Rare Ordovician Asaphida

7.14 Good

14

Ampyx

Ampyx is an extinct genus of trilobite from the order Trinucleida that lived during the Ordovician period. These blind t...

European Blind Ordovician Trinucleida

6.90 Fair

15

Pseudoasaphus

Pseudoasaphus is an extinct genus of asaphid trilobite that inhabited the marine environments of Baltica during the Ordo...

Russian Ordovician Asaphida Asaphidae

6.90 Fair

16

Ogygiocaris

Ogygiocaris is an extinct genus of large asaphid trilobites from the Ordovician Period. Fossils are known from Wales and...

Large Scandinavian Ordovician Asaphida

6.62 Fair

17

Amphion

Ordovician asaphid trilobite from Baltica, known from Scandinavian and Baltic limestones and characterized by a smooth,...

Smooth Rare Scandinavia Ordovician

6.61 Fair

18

Ogygiocarella

Ogygiocarella is an Ordovician trilobite genus known particularly from Wales. It belongs to the asaphid lineage and is h...

Large British Ordovician Asaphida

6.44 Fair

19

Pilekia

Pilekia is an extinct trilobite genus in the family Pilekiidae, within the order Phacopida and suborder Cheirurina. It b...

Europe Small Rare Ordovician

6.28 Fair

20

Panderia

Panderia is a genus of Ordovician trilobites assigned to the superfamily Trinucleoidea. It is known from fossil deposits...

Blind Scandinavian Ordovician Trinucleida

4.78 Poor