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| | Thelodonti |
 | | martinssoni (Gross, 1967) [Logania martinssoni Gross, 1967] |
 | | scotica (Traquair, 1898) [Logania scotica Traquair, 1898] |
 | | spinosa Traquair, 1898 `--o †Coelolepididae Pander, 1856 [Loganiidae Karatajute-Talimaa, 1978] -- †Coelolepis -- †Larolepis darbyi Sansom and Elliott, 2002 --o †Logania |
| www.fmnh.helsinki.fi /users/haaramo/Metazoa/Deuterostoma/Chordata/Agnatha/thelodonti.htm (472 words) |
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