Periphylla periphylla

Periphylla periphylla (Péron & Lesueur, 1810) Distribution See Fig. 1, Mendoza-Becerril et al. (2025). Notes The specimen examined shows the diagnostic features of the genus Periphylla: 12 tentacles, 16 marginal lappets, a dome-shaped exumbrella and a deep annular furrow (Mayer 1910). This species is the only valid member of the genus following a complex taxonomic history in which P. hyacinthina Haeckel, 1880, P. humilis Fewkes, 1886 and P. regina Haeckel, 1880 were synonymised (Collins et al. 2025). Periphylla periphylla has been recorded in several deep sea areas, such as the Gulf of St. Lawrence, the Strait of Belle Isle and southwards to the coast of Virginia (Collins et al. 2025). Additional records document its presence in the Gulf of Mexico at depths exceeding 600 m (Lucas 2008, Lucas and Reed 2009). Other reports show its presence in northern and southern polar waters, the Pacific, Indian and Mediterranean seas (see Båmstedt 2023). This global distribution supports the identification of our specimen from the Caribbean Sea as P. periphylla (Fig. 2 c).