A very fine specimen showing stem, 13 mm by 7 mm, calyx and two large arms, 45 mm by 35 mm showing branching which is initially isotomous and subsequently heterotomous, and all the individual brachial ossicles. Another calyx with attached stem is also present. From Crawfordsville, Indiana, USA.
Size: 60 mm x 40 mm on a block 85 mm x 35 mm.
Size: 60 mm x 40 mm on a block 85 mm x 35 mm.