After Parker, 1982, Cherns, 2004, and Hoare & Farrell, 2004
Note:
Taxonomic listings of “paleoloricate” chitons may include other morphologically similar sclerites which may instead be aplacophoran or monoplacophoran molluscs.
<==o Polyplacophora (chitons; nivelkotilot, kitonit) `==o †Paleoloricata Bergenhayn, 1955 |-- †Matthewia U.Camb. [paraphyletic Matthewiidae Walcott, 1886] `--+-- †Hemithecella L.Ord. [paraphyletic Matthewiidae Walcott, 1886] `--+--+-- †Conodia [paraphyletic Matthewiidae Walcott, 1886] | `--+-- †Elongata [paraphyletic Matthewiidae Walcott, 1886] | `-- †Robustum [paraphyletic Matthewiidae Walcott, 1886] `--+-- †Calceochiton |--+-- †Spicuchelodes | `--o †Chelodes Davidson & King, 1874 [paraphyletic Matthewiidae Walcott, 1886] | |-- †C. actinis Cherns, 1998 | |-- †C. bergmani Davidson & King, 1874 | |-- †C. bohemicus Barrande, 1867 | |-- †C. calceoloides Etheridge, 1897 | |-- †C. cordatus Hoare & Farrell, 2004; L.Dev. SWAust. | |-- †C. depressus Bergenhayn, 1960 | |-- †C. gotlandicus Lindström, 1884 | |-- †C. intermedius Bergenhayn, 1960 | `-- †C. whitehousei Runnegar et al., 1979 `--+-- †Thairoplax `--+-- †Cobcrephora ?U.Ord.-Sil. Aust. [Phosphatoloricata Bischoff, 1981] `--+-- †Plectrochiton `--+-- †Gotlandochiton Bergenhayn, 1955 `--+--+-- †Alastega | `--+--o †Kindbladchiton | | `-- †K. arbucklensis | `--+-- †Ivoechiton | `--+-- †Paleochiton | `-- †Gotlandochiton hami `--+--+--o †Helmithochiton | | |-- †H. thraivensis | | `-- †H. griffithi | `--+-- †Septemchiton [Septemchitonidae] | `-- †Solenocaris `--o Neoloricata Bergenhayn, 1955 |--o Lepidopleurida Thiele, 1910 | |-- †Gryphochiton | |--o †Acutichitonidae Hoare, Mapes & Atwater, 1983 | | `--o †Acutichiton Hoare, Sturgeon & Hoare, 1972 | | |-- †A. pyrmidalus Hoare, Sturgeon & Hoare, 1972 | | `-- †A. depressolatus Hoare & Farrell, 2004; L.Dev. SWAust. | |--o Lepidopleuridae Pilsbry, 1892 | | |-- †Jugochiton patulus Hoare & Farrell, 2004; L.Dev. SWAust. | | |-- †Harpidochiton auctus Hoare & Cook, 2002 | | `== “Recent lepidopleurids” | |-- Hanleyidae | `-- Choriplacidae `--+--o †Multiplacophora | |-- †Diadeloplax Dev. | `-- †Strobilepis Carb. `--+?- Lepidochitona |--o Ischnochitonida | |-- Subterenochitonidae | |-- Ischnochitonidae | |-- Schizoplacidae | |-- Callochitonidae | |-- Callistoplacidae | |-- Chaetopleuridae | |-- Mopaliidae | |-- Schizochitonidae | `-- Chitonidae (kitonit) `--o Acanthochitonida `-- Acanthochitonidae
Reference(s):
- Cherns, L., 2004: Early Palaeozoic diversification of chitons (Polyplacophora, Mollusca) based on new data from the Silurian of Gotland, Sweden.
–Lethaia: Vol. 37, pp. 445-456 - Hoare, R. D. & Farrell, J. R., 2004: Lower Devonian Polyplacophora from New South Wales, Australia.
–Palaeontology: Vol. 47, #6, pp. 1495-1506 - Parker, S. P. (ed.), 1982: Synopsis and classification of living organisms. Vols. 1 & 2
–McGrew-Hill Book Company