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The examples are taken from the Figs. 2–4; see further information there. (A) Type I-circles in Dorateuthis syriaca (PIMUZ 51762, Cenomanian, Haqel, Lebanon). (B) Type II-circles, same specimen as in A. (C) Type II-circles in Trachyteuthis hastiformis (SMNS 70496, Kimmeridgian, Painten, Germany). (D) Type III-circles, same specimen as in C. Photo credit: Dieter Buhl.
