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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa

Fig. 2

Pentecopterus decorahensis, SUI 139979 - prosomal ventral plate, rostrum and proximal limb podomeres. a Rostrum and lateral portion of ventral plate with overlying proximal portions of prosomal appendages II–VI, direct light. b Transmitted light. c Interpretive drawing: red = ventral plate, green = appendage II, blue = appendage III, yellow = appendage IV, pink = appendage V, purple = appendage VI, and gray = ventral carapace cuticle, MR = marginal rim, II–VI = appendages II–VI. Scale bars = 10 mm

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