swap_horiz Akmonistion Alternatives

1

Helicoprion

Helicoprion is an extinct genus of shark-like cartilaginous fish that lived during the Permian period, first named in 18...

Marine Extinct Permian Tooth Whorl

9.2 Excellent

2

Ptychodus

"Ptychodus" is an extinct genus of large durophagous shark that lived during the Late Cretaceous period. Historically kn...

Marine Giant Extinct Cretaceous

8.4 Great

3

Cladoselache

Cladoselache is an extinct genus of shark-like cartilaginous fish from the Late Devonian, known especially from well-pre...

Marine Devonian Extinct Paleozoic

8.2 Great

4

Aquilolamna milarcae

Aquilolamna milarcae is an extinct Cretaceous elasmobranch known from a fossil discovered in northeastern Mexico and for...

Marine Winged Extinct Cretaceous

8.2 Great

5

Stethacanthus

Stethacanthus is an extinct genus of shark-like cartilaginous fish that lived during the Late Devonian and Carboniferous...

Marine Extinct Carboniferous Paleozoic

8.1 Great

6

Edestus

Edestus is an extinct genus of eugeneodontid holocephalan fish that lived during the Late Carboniferous period, with fos...

Marine Extinct Carboniferous Eugeneodont

8.1 Great

7

Squalicorax

Squalicorax, commonly referred to as the crow shark, is an extinct genus of marine shark that lived during the Cretaceou...

Marine Scavenger Extinct Cretaceous

8.0 Great

8

Hybodus

Hybodus is an extinct genus of hybodont shark that lived from the Late Permian to the Late Cretaceous periods. Character...

Marine Extinct Mesozoic Hybodont

7.7 Good

9

Phoebodus

Phoebodus is an extinct genus of shark that lived during the Devonian period, approximately 419 to 359 million years ago...

Marine Devonian Extinct Paleozoic

7.6 Good

10

Orthacanthus

Orthacanthus is an extinct genus of xenacanthid shark that inhabited freshwater swamps and bayous during the Carbonifero...

Freshwater Extinct Paleozoic Spined

7.4 Good

11

Falcatus

Falcatus is an extinct genus of small holocephalan or shark-like fish that lived during the Carboniferous period, with f...

Small Extinct Carboniferous Spined

7.4 Good

12

Doliodus problematicus

Doliodus problematicus is an extinct species of cartilaginous fish that lived during the Early Devonian period, with fos...

Marine Devonian Extinct Spined

7.3 Good

13

Scapanorhynchus texanus

Scapanorhynchus texanus is an extinct species of mitsukurinid shark that lived during the Cretaceous period, primarily r...

Marine Extinct Cretaceous Mitsukurinidae

7.2 Good

14

Ctenacanthus

Ctenacanthus is a Paleozoic ctenacanthiform shark genus named by Louis Agassiz in 1837, noted for comb-like dorsal fin s...

Marine Extinct Paleozoic Spined

7.1 Good

15

Megalolamna paradoxodon

Megalolamna paradoxodon is an extinct otodontid shark from the early Miocene. It was described as a new genus and specie...

Large Marine Extinct Miocene

6.9 Fair

16

Tristychius arcuatus

Tristychius arcuatus is an extinct small shark from Carboniferous rocks in Scotland. It is a member of Tristychius, a fo...

Small Marine Extinct Carboniferous

6.8 Fair

17

Symmorium

Symmorium is an extinct genus of cartilaginous fish from the Devonian and Carboniferous periods. Its type species, Symmo...

Marine Extinct Carboniferous Cartilaginous

6.7 Fair

18

Serratolamna serrata

Serratolamna serrata is an extinct lamniform shark known primarily from fossil teeth. Louis Agassiz described the specie...

Marine Teeth Extinct Cretaceous

6.3 Fair

19

Menaspis

Menaspis is an extinct genus of holocephalian cartilaginous fish from the Permian period. Fossils are known from Europe,...

Marine Extinct Permian Cartilaginous

6.3 Fair

20

Anomotodon novus

Anomotodon novus is an extinct species of lamniform shark known mainly from fossil teeth. The genus is related to the sh...

Marine Extinct Cenozoic Mackerel

6.2 Fair