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Abstract:
Craspedocarpus has seven currently described species from the western Atlantic and South Pacific Oceans. The genus is characterized by well-developed rosettes of small outer cortical cells, marginal proliferations, discoid holdfasts, carposporophytes with several large central cells and zonate tetrasporangia. Craspedocarpus jindoensis sp. nov. collected from Jindo, Korea, is here described as a new species on the basis of morphological and molecular data. The new species is characterized by having fan-shaped thalli, smooth margins, subdichotomous branching pattern, incomplete pseudoparenchymatous medulla with filaments, and tetrasporangial sori and cystocarps both in fronds and proliferations. Phylogenetic analysis of rbcL also placed C. jindoensis sp. nov. in Craspedocarpus and distinguished it from congeners. The sequence divergences between C. jindoensis sp. nov. and the other species of Craspedocarpus, C. erosus, C. tenuifolius and C. venosus are 2.9%–3.2%, respectively.
ACKNOWLEDGEMENTS
We thank C.W. Schneider, an unidentified reviewer, and D. Garbary, for many constructive suggestions to improve the manuscript. This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (20150634), the National Institute of Biological Resources (NIBR) funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR No. 201601204) and the Marine Biotechnology Program grant (PJT200519 and PJT200669) funded by the Ministry of Oceans and Fisheries, Korea, to Tae Oh Cho.