Arachnactidae is a family of tube-dwelling anemones in the order Ceriantharia. It is the only family in the monotypic order Penicillaria and comprises around 38 species. They differ from other ceriantharians in the makeup of their cnidome (the types of cnidocyte present), the relative sizes of the oral discs and the shape and structure of the mesenteries. These tube anemones dwell in parchment-like tubes immersed in soft sediment, and have two whorls of tentacles, the outer ones being much longer than the inner ones.
FAMILY
via GBIF
Arachnactidae is a family of tube-dwelling anemones in the order Ceriantharia. It is the only family in the monotypic order Penicillaria and comprises around 38 species. They differ from other ceriantharians in the makeup of their cnidome (the types of cnidocyte present), the relative sizes of the oral discs and the shape and structure of the mesenteries. These tube anemones dwell in parchment-like tubes immersed in soft sediment, and have two whorls of tentacles, the outer ones being much longer than the inner ones.
==Genera== The World Register of Marine Species includes the following genera in the family : Anactinia Annandale, 1909 Arachnactis Sars, 1846 Arachnanthus Carlgren, 1912 Dactylactis Van Beneden, 1897 Isapiactis Carlgren, 1924 Isarachnactis Carlgren, 1924 Isarachnanthus Carlgren, 1924 Isovactis Leloup, 1942 Ovactis Van Beneden, 1897 Paranactinia Carlgren, 1924
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).