Hypnea tsudae M.O.Paiano F.P.Cabrera & A.R.Sherwood, 2022

Paiano, Monica O., Fumo, James T., Cabrera, Feresa P., Kosaki, Randall K., Spalding, Heather L. & Sherwood, Alison R., 2022, Calliblepharis yasutakei sp. nov. and Hypnea tsudae sp. nov. (Cystocloniaceae, Rhodophyta): novel diversity from the Hawaiian Islands, Phytotaxa 572 (1), pp. 74-86 : 82

publication ID

https://doi.org/ 10.11646/phytotaxa.572.1.5

DOI

https://doi.org/10.5281/zenodo.7305720

persistent identifier

https://treatment.plazi.org/id/9E5FA436-E837-F12F-FF78-5884CBC2FC05

treatment provided by

Plazi

scientific name

Hypnea tsudae M.O.Paiano F.P.Cabrera & A.R.Sherwood
status

sp. nov.

Hypnea tsudae M.O.Paiano F.P.Cabrera & A.R.Sherwood , sp. nov. ( Fig. 4 View FIGURE 4 A-H)

Holotype: — U.S.A. Hawai‘i, Pu‘ukohala Heiau National Park, Island   GoogleMaps of Hawai‘i 20.748°N, 24.384°W, 1.5 m depth, 03 August 2006, C. Squair (holotype BISH 740394 About BISH ).

Paratypes: — ARS 03115 ( BISH 786150 About BISH ) from U.S.A. Hawai‘i, Island of Maui , Hana, Kaihalulu Beach, 20.7589°N, 155.985°W, intertidal, 10 December 2007, K. Conklin GoogleMaps ; ARS 03542 ( BISH 786151 About BISH ) from U.S.A. Hawai‘i, Island of Kauai , 22.2208°N, 159.583°W, intertidal, 17 March 2007, A. Kurihara GoogleMaps .

Description: Thalli upright, terete, ranging from 1.2–4.5 cm in length ( Figs 4A–C View FIGURE 4 ), usually rich red in color when living, drying to a light pink to orange when pressed ( Fig 4A View FIGURE 4 ). Thalli are compressed with thorn-like branchlets that are often dichotomously branched at the apices and alternately branched in the mid to basal portions ( Figs 4D–E View FIGURE 4 ). Branching most often in three-dimensional space ( Figs 4A–E View FIGURE 4 ). In surface view, thallus is composed of small cortical cells, elongated, 4.0–7.5 μm in length and 2.0–10.8 μm in diameter ( Fig 4F View FIGURE 4 ). Axes uniaxial, rounded. Transverse sections 310–440 μm in diameter ( Figs 4G–H View FIGURE 4 ). Each axial cell surrounded by three to five periaxial cells ( Figs 4G–H View FIGURE 4 ), 38–45 μm in diameter, surrounded by two to four layers of large, rounded to cuboidal medullary cells, 30–98 μm in length and 20–60 μm in width. Holdfast not observed. Only sterile plants observed.

Etymology:— This species is named in memory of our colleague, Dr. Roy Tsuda, who made many contributions to our understanding of the flora of the Western Pacific, and who collaborated with us extensively on the taxonomy of the mesophotic flora of the Hawaiian Islands and the Papahânaumokuâkea Marine National Monument.

Distribution and Habitat:— subtidal from Island of Hawai‘i, intertidal coastal waters of Maui and Kaua‘i, in the Main Hawaiian Islands, USA.

Identification using DNA sequence data:— GenBank accessions OL795917 View Materials (COI), OL795918 View Materials (rbc L) and OL828741 View Materials (SSU) for the holotype, ON704651 View Materials (ARS 03115) and ON704652 View Materials (ARS 03542) (rbc L) for the paratypes.

C

University of Copenhagen

K

Royal Botanic Gardens

A

Harvard University - Arnold Arboretum

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