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†Umbonichnus Karaszewski 1974
urn:lsid:organismnames.com:name:2155358
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160
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†Umbonichnus Karaszewski 1974
Karaszewski 1974. A new trace fossil from the Lower Jurassic of the Holy Cross Mts. Bulletin Acad pol Sci (Ser Sci Tere), 22(3-4) 1974: 157-160