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Abstract:
Using morphological and molecular evidence, we describe a new genus, Neochondria, based on specimens formerly identified as ‘Chondria tenuissima’ sensu Okamura in Japan. The generitype, Neochondria ammophila sp. nov., is not closely related to Chondria capillaris (Hudson) M.J. Wynne, the generitype of Chondria. The anatomy of Neochondria differs from that of Chondria by the development of adventitious elongate cells between the five major pericentral cells, forming densely compact layers surrounding the axial strand, even in the ultimate branchlets. We propose the new combination, Neochondria nidifica, based on Chondria nidifica Harvey from California, USA and Baja California, Mexico. Multigene analyses (rbcL, small subunit and cox1) and morphological observations demonstrated that N. ammophila and N. nidifica share a clade but preliminary results show that they may not belong in the tribe Chondrieae.
ACKNOWLEDGEMENTS
We thank Dr Michio Masuda for his support and encouragement. We also thank Drs Michael D. Guiry, Siew Moi Phang, Ryuta Terada, Shinya Uwai, Shigeo Kawaguchi, Taizo Motomura, Chikako Nagasato, Jiro Tanaka and Hidekazu Suzuki for their help in specimen collection. This work was supported by a full scholarship from the Royal Thai Government for Ms Suttikarn Sutti. We thank members of the phycology laboratory (Biodiversity II), Hokkaido University, for their kind assistance.
SUPPLEMENTARY DATA
Supplementary data associated with this article can be found online at http://dx.doi.org/10.2216/17-96.1.s1.