Ophiuroidea source details
Johnson, C. W. (1899). New and interesting species in the "Isaac Lea collection of Eocene Mollusca". Proceedings of the Academy of Natural Sciences of Philadelphia. 51: 71-82, pls. 1-2.
346904
Johnson, C. W.
1899
New and interesting species in the "Isaac Lea collection of Eocene Mollusca"
Proceedings of the Academy of Natural Sciences of Philadelphia
51: 71-82, pls. 1-2
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