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The monotypic delesseriaceous genus  Opephyllum  was created by Schmitz in Schmitz and Hauptfleisch for  O. martensii , represented by a single collection from Zamboanga on the southwestern tip of Mindanao in the southern Philippines. As the type specimen or collection is no longer in existence, we are neotypifying the taxon based on recent topotype collections made in the spring of 1998. After comparison of this material with species of  Martensia  from the Indo-Pacific region and Caribbean Sea based on morphological evidence and sequence analysis of chloroplast-encoded  rbc L and the nuclear-encoded large subunit ribosomal DNA gene (LSU rDNA), we conclude that  Opephyllum  is not generically distinct from  Martensia  despite its lack of the reticulate fenestrations that characterize fronds of every other species of the latter.We therefore propose the new combination  Martensia martensii  (Schmitz  in  Schmitz  et  Hauptfleisch) Lin, Fredericq  et  Liao for this rare member of the tribe Martensieae, subfamily Nitophylloideae.

botanica marina

Neotypification and Taxonomic Status of Opephyllum martensii Schmitz in Schmitz et Hauptfleisch (Delesseriaceae, Rhodophyta) from Zamboanga, Southern Philippines