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проостракум nstresses
geol. proostracum
Gruzovik, paleont. proostracum the anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous
paleont. pro-ostracum; proöstracum
проостракум: 1 phrase in 1 subject
Paleontology1

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