Summary[edit] Description: Español: Thuridilla gracilis forma ratna, 25 mm, Seychelles. Date: 22 May 2012, 19:07:45. Source: https://zookeys.pensoft.net/articles.php?id=2811&display_type=list&element_type=8 Yonow N (2012) Opisthobranchs from the western Indian Ocean, with descriptions of two new species and ten new records (Mollusca, Gastropoda). ZooKeys 197: 1-129. doi: 10.3897/zookeys.197.1728. Author: P Kemp / N Yonow.