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, and Calcaxonia - Part I: Introduction, species of Scleraxonia and Holaxonia (Family Acanthogorgiidae) Author Horvath, Elizabeth Anne text ZooKeys 2019 860 1 66 http://dx.doi.org/10.3897/zookeys.860.19961 journal article http://dx.doi.org/10.3897/zookeys.860.19961 1313-2970-860-1 11140DC997444A479EC83AF9E2891BAB Family Paragorgiidae Kuekenthal , 1916 Diagnosis. Robust, profusely branched colonies with dimorphic polyps (feeding autozooids, reproductive siphonozooids). Axial skeletal structure solely a continuous medulla, containing separable sclerites. Medulla perforated by gastrodermal canals all the way to branch tips, not separated from cortex by a ring of boundary canals.