Figure 21. Color figures of skeleton of various Alaskan stylasterids: A Stylaster parageus parageus, B Stylaster parageus columbiensis C Stylaster elassotomus D Stylaster crassiseptum E–G Stylaster alaskanus. A holotype, USNM 42871 B holotype, USNM 1122462 C holotype, USNM 43268 D holotype, USNM 1122531 E holotype of Stylaster gemmascens alaskanus, USNM 43269 F holotype of Stylaster cancellatus, USNM 43267 G large colony, USNM 1122454.
Figure 23. Stylaster parageus columbiensis, A–H, J holotype (male), USNM 1122462, I female paratype, USNM 1117112: A stereo view of branch segment including male ampullae B a cyclosystem C longitudinal fracture of a cyclosystem D stereo view of a gastrostyle and rudimentary ring palisade E–F rough and smooth coenosteal texture G gastrostyle tip and ring palisade H two dactylostyles I female ampulla J male ampullae.