Hemicorallium Gray 1867

GenusHemicoralliumGray, 1867 Hemicorallium Gray, 1867: 126; Ridley 1882: 222; Johnson 1899: 59; Kükenthal 1924: 47; Bayer 1956: 74; Bayer 1964: 467; Bayer and Cairns 2003: 222; Ardila et al. 2012: 254; Figueroa and Baco 2014: 83; Tu et al. 2015 a: 302; 2015 b: 173; 2016; 1010–1011; Horvath, E. A. 2019: 28. Type species. Hemicorallium tricolor Johnson, 1899. Diagnosis. Modified from Tu et al. (2016) and Nonaka and Hayashibara (2021). Polyps are dimorphic, consisting of autozooids and siphonozooids. Autozooids are prominent, oval and usually distributed on one side of the colony. When contracted, the autozooids cannot fully retract into the cortex. Siphonozooids are fertile, usually inconspicuous or appear as papillae and are distributed near the base of autozooids. Sclerites include small rods, crosses, 6 -, 7 - and 8 - radiates; double clubs are only present in some species and vary in shape. Long rods or spindles are usually present in tentacles.