A new genus and species from the North Atlantic, Archestenogramma profundum (Phyllophoraceae, Rhodophyta), with taxonomic resolution of the orphaned Leptofauchea brasiliensis
2011
Schneider, Craig W. | Chengsupanimit, Tayoot | Saunders, Gary W.
A recent collection of a red alga from Bermuda showed great similarities to Leptofauchea brasiliensis from Brazil, providing the impetus for a morphological and anatomical evaluation of the two. Based on these studies, the two appear to be congeneric. Molecular phylogenetic analyses of the Bermudian plants showed them to be to be a new genus and species of the Phyllophoraceae (Gigartinales), Archestenogramma profundum C.W. Schneider, Chengsupanimit & G.W. Saunders. In light of our anatomical observations, our phylogenetic results also proved instructive as to the disposition of L. brasiliensis, a species that was suggested to be incorrectly assigned to the Rhodymeniales for over a quarter of a century and even recently excluded from Leptofauchea. The morphological and anatomical similarity of L. brasiliensis to A. profundum suggested its movement from the Faucheaceae to a new taxonomic placement in the Phyllophoraceae, as A. brasiliense (A.B. Joly) C.W. Schneider, Chengsupanimit & G.W. Saunders, comb. nov.
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