Kingdom Animalia Class †Graptolithinia | Phylum Hemichordata Rank Genus | |
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Similar Tetragraptus, Graptolithina, Phyllograptus, Diplograptus, Climacograptus | ||
Didymograptus is an extinct genus of graptolites with four rows of cups.
References
Didymograptus Wikipedia(Text) CC BY-SA