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Stramentum haworthi
Description Stramentum haworthi (Williston, 1896). A, individual showing interior of peduncular plates, only the capitular plates remain of the upper side; NHMUK In. 22640. B, two small individuals in similar preservation, probably in life orientation; NHMUK In. 21940. C, exceptionally well-preserved individual, all plates intact except base of peduncle; NHMUK In. 15945, original of Withers (1920, pl. 4, fig. 3; 1935, pl. 42, fig. 5). D, large individual in common preservational mode, with some disarticulation; NHMUK In. 15945, original of Withers (1920, pl. 4, fig. 2; 1935, pl. 42, fig. 4). All attached to baculitid ammonites, shown in Figure 26. The individual shown in C is at the top of Figure 26C. Niobrara Chalk, horizon with Uintacrinus socialis (upper Santonian) of Elkader, Kansas. Scale bar D 5 mm.
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