Fig. 5From: The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa Pentecopterus decorahensis, juveniles. a, b SUI 139963, prosomal appendages III and IV, (a) counterpart, (b) part. c SUI 139965, prosomal appendages II–IV. Scale bars = 10 mmBack to article page