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Table 2 Pentecopterus decorahensis cheliceral measurements

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

Specimen

Appendage I

SUI 139934

(podomere 3): Free finger, 14/5.

SUI 139935

(podomeres 1–3): Peduncle, 15/8. Fixed finger, 17/7. Free finger, 9/4.

SUI 139939

(podomeres 1–3): Peduncle, 10a/4a. Fixed finger, 23a/11. Free finger, 8a/4.

SUI 139952

(podomeres 1–3): Peduncle, 28/11. Fixed finger, 28/12. Free finger, 14/5.

SUI 139972

(podomeres 2–3): Fixed finger, 13/5. Free finger, 4/2.

SUI 139983

(podomeres 2–3): Fixed finger, 28/12. Free finger, 15/5.

  1. Length/width. All measurements in millimetres
  2. aindicates an incomplete measurement