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Middle Cambrian animals - Animals in the Fossil sites, and Biodiversity
The middle Cambrian in Paleozoic spanned from 513 to 496 millon years ago. The explanation in brackets is the ages they lived in extinct species. Note that Mya is million years ago. For example, "48.6~40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The time range is shown in the Geological Time Table. The followings are a part of the Evolutionary Tree. Cambrian, Early Cambrian, Middle Cambrian, Late Cambrian
- Kingdom Plantae (Plant)
- Phylum Chlorophyta (Green algae)
- Kingdom Animalia
- Phylum unresolved
- Subkingdom Parazoa
- Subkingdom Eumetazoa
- Clade Radiata (Diploblastic - Two germ layers)
- Phylum Cnidaria (Coral, Jelly fish)
- Phylum Ctenophora (Comb jellies)
- Clade Bilateria (Triploblastic - Three germ layers)
- Clade Protostomia (First mouth)
- Phylum Priapulida (Penis worms)
- Phylum Lobopodia
- Phylum Arthropoda (Trilobite, Insect, Crustacean)
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 | Arachnomorpha |
Leanchoilia (520~501 Mya),
Habelia (513~501 Mya),
Yohoia (513~501 Mya),
Forfexicaris (513~501 Mya) |  | Trilobite |
Redlichia (530~501 Mya),
Paradoxides (530~501 Mya),
Olenoides (530~490 Mya),
Peronopsis (530~490 Mya),
Kootenia (530~490 Mya),
Albertella (530~490 Mya),
Naraoia (520~501 Mya),
Dorypyge (520~490 Mya),
Sidneyia (516~501 Mya),
Ogygopsis (516~488.3 Mya),
Alokistocarella (516~488.3 Mya),
Marrella (513~501 Mya) |  | Chelicerata |
Sanctacaris (513~496 Mya) |  | Horseshoe crab |
Aglaspis (501~490 Mya),
Beckwithia (501~488.3 Mya) |  | Crustacean |
Waptia (520~501 Mya),
Canadaspis (520~501 Mya),
Odaraia (520~501 Mya),
Plenocaris (513~501 Mya) |
- Phylum Brachiopoda (Lamp shells)
- Phylum Mollusca (Limpet, Snail, Slug, Octopus, Squid)
- Phylum Annelida (Ringed worms)
- Clade Deuterostomia (Second mouth)
- Phylum Echinoderm (Sea lily, Sea star, Brittle star, Sea urchin, Sea cucumber)
- Phylum Chordata
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