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†Gracilithecidae Sysoev 1972
urn:lsid:organismnames.com:name:730
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122
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†Gracilithecidae Sysoev 1972
Sysoev 1972. [Biostratigraphy and hyolite-orthothecimorphs of the Lower Cambrian, Siberian platform.]. Nauka, Moscow, 1972: 1-151