Spiny shark (Phylogenetic tree) - Wildlife in the Habitats and the Fossil sites

Spiny shark (Phylogenetic tree) - Animals in the Habitats and the Fossil sites, and Biodiversity

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The followings are extinct spiny sharks excavated. The explanation in brackets is the ages they lived in extinct species, and the habitat in extant 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.

Kingdom Animalia
- Phylum Chordata ⇒ Class Fish
  - Subphylum Vertebra
    - Superclass Agnatha (Oldest fishes, Hagfish, Lamprey) Jawless fish
      - Class Pteraspidomorphi (Early jawless fish; 476.8～376.1 Mya)
      - Class Thelodonti (Advanced jawless fishes; 460.5～409.1 Mya)
      - Class Anaspida (Ancestors of lampreys)
      - Class Pituriaspida (Armored jawless fishes)
      - Class Osteostraci (Bony-armored jawless fishes)
    - Infraphylum Gnathostomata (Jawed vertebrates)
      - Class Placodermi (extinct group; 418.1～245 Mya) Armoured fish
    - Class Chondrichthyes (Ray, Shark; 466 Mya～) Cartilaginous fish
    - Class Acanthodii (extinct group; 421.3～255 Mya) Spiny sharks
      - Order Climatiiformes (421.3～318.1 Mya)
        Spiny shark Climatius (418.7～412.3 Mya), Parexus (416～397 Mya), Diplacanthus (385.3～359.2 Mya)
      - Order Acanthodiformes (409.1～284 Mya)
        Spiny shark Acanthodes (409.1～284 Mya; Great Dying②), Cheiracanthus (390～380 Mya)
      - Order Ischnacanthiformes
        Spiny shark Ischnacanthus (421.3～409.1 Mya)
      - Superclass Osteichthyes (Bony fish)
        Class Sarcopterygii (Four-limbed vertebrate, Coelacanth, Lungfish; 422.9 Mya～) Lobe-finned fish
        
        Class Actinopterygii (Most living fishes; 421.3 Mya～) Ray-finned fish