A review of gorgonian coral species (Cnidaria, Octocorallia, Alcyonacea) held in the Santa Barbara Museum of Natural History research collection: focus on species from Scleraxonia, Holaxonia, Calcaxonia – Part II: Species of Holaxonia, families Gorgoniidae and Plexauridae

Chromoplexaura marki, SBMNH 423060, light microscopy arrays. A 4× magnification. Note in particular the “triangular-capped” spindle designated with arrow. This sclerite form is never seen in specimens from the genus Swiftia (some species in genus Swiftia can look superficially like this species in overall colony form) B Additional image at 4× magnification of sclerites, illustrating further examples of “triangular-capped” spindles appearing commonly in Chromoplexaura marki C 10× magnification of sclerites, showing variety, with particularly clear example of the “triangular-capped” spindle, indicated with arrow.