Figure 42 from: Horvath EA (2019) 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 III: Suborder Holaxonia continued, and suborder Calcaxonia. ZooKeys 860: 183-306. https://doi.org/10.3897/zookeys.860.34317

Figure 42 Genus Keratoisis, SBMNH 422980, light microscopy arrays. A 4× magnification, showing sclerites, most notably very long needle form B Array of shorter needles, 10× magnification C Image specifically highlights very long needles characteristic of species in genus Keratoisis. Long needle-like sclerites range from 620–775 µm in length, while very small spindles average ~80 µm.