H. ocellata: scanning electron microscopy images of ossicles. A, B. Buttons with 3 pairs of holes; C, D. Buttons with 4–7 pairs of holes; E, F. Tables with larger discs; G, H. Tables with smaller discs; I, J. Rods in papillae, tube feet, or body wall; K. C-shaped ossicles in the body wall; L-O. Perforated plates of papillae, or tube feet; P–R. Rods in tentacles; S, T. Tack-like tables of papillae.

 
 
  Part of: Jia C, Xu Z, Li F, Chen L, Wang A, Gao F (2025) Taxonomic status and phylogenetic analyses based on complete mitochondrial genome and microscopic ossicles: Redescription of a controversial tropical sea cucumber species (Holothuroidea, Holothuria Linnaeus, 1767). Zoosystematics and Evolution 101(2): 791-804. https://doi.org/10.3897/zse.101.137781