TY - JOUR A1 - Schneider, Craig W. A1 - Cassidy, Margaret M. A1 - Saunders, Gary W. T1 - The pseudodichotomous Dasya sylviae sp. nov. (Delesseriaceae, Ceramiales) from 60–90 m mesophotic reefs off Bermuda T2 - European journal of taxonomy N2 - The red alga Dasya sylviae C.W.Schneid., M.M.Cassidy & G.W.Saunders sp. nov. is described from mesophotic depths of 60–90 m off Bermuda. Genetic sequences (COI-5P, rbcL) and morphological characteristics show that this species is distinct from other known pseudodichotomous species of Dasya. Of ten current species in the genus reported from Bermuda, only three, D. collinsiana M.Howe, D. cryptica C.W.Schneid., Quach & C.E.Lane and D. punicea (Zanardini) Menegh., share the overall pattern of pseudodichotomous branching in their axes; however, key morphological features easily distinguish them from D. sylviae sp. nov. The species most similar in habit to D. sylviae sp. nov. is D. crouaniana J.Agardh (type locality West Indies), but it bears shorter pseudolateral branches, and broader and longer tetrasporangial stichidia than the new species. Unique among the species of Dasya, D. sylviae sp. nov. lacks post-sporangial cover cells in tetrasporangial stichidia. T3 - European journal of taxonomy : EJT - 751:24-37 KW - Western Atlantic KW - Dasya KW - mesophotic zone KW - Rhodophyta Y1 - 2021 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/59384 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-593843 SN - 2118-9773 VL - 2021 IS - 751 SP - 24 EP - 37 PB - Muséum National d'Histoire Naturelle CY - Paris ER -