A new species of the genus Sheathia (Batrachospermaceae, Rhodophyta) from Japan. Issue 4 (4th July 2021)

• Record Type: Journal Article
• Authors: Suzuki, Masahiro; Kitayama, Taiju
• Is Part Of: Phycologia. Volume 60:Issue 4(2021)
• Page Start: 368
• Page End: 374
• Publication Date: 2021-07-04
• Subjects: Batrachospermales -- COI-5P -- Phylogeny -- rbcL -- Sheathia yoshizakii sp. nov. -- Taxonomy; Algology -- Periodicals; Algae -- Periodicals; Algae; Natuurkunde; Algae; Periodicals; Electronic journals; 579.805
• DOI: 10.1080/00318884.2021.1946643
• Languages: English
• ISSNs: 0031-8884

Abstract

ABSTRACT: We describe herein a new species of Sheathia from Chiba Prefecture, Japan (previously attributed to S. arcuata ) based on morphological studies and molecular analyses of rbc L and COI-5P DNA sequences. We assign the binomial Sheathia yoshizakii sp. nov . to this new entity. The rbc L and COI-5P analyses suggest that S. yoshizakii is distinct from other Sheathia species. Sheathia yoshizakii is characterized by homocortication, a carpogonium with clavate to lanceolate trichogyne, and exerted carposporophytes. Although S. yoshizakii is distinguished from other Sheathia species by rare production of secondary fascicle and relatively long carpogonial branch, more than seven carposporophytes per whorl, and frequently exerted carposporophytes, these morphological characters are variable and consistent with the general circumscription of S. arcuata. Sheathia yoshizakii is the first Sheathia species confirmed by DNA sequence data in Japan.