Ulva piritoka Ngāti Kuri, Heesch, 2021

Heesch, Svenja, Sutherland, Judy E., Ringham, Sandi & Nelson, Wendy A., 2021, Ulva L. (Ulvales, Chlorophyta) from Manawatāwhi / Three Kings Islands, New Zealand: Ulva piritoka Ngāti Kuri, Heesch & W. A. Nelson, sp. nov. and records of two nonnative species, U. compressa and U. rigida, Cryptogamie, Algologie 20 (9), pp. 129-140 : 134

publication ID	https://doi.org/ 10.5252/cryptogamiealgologie2021v42a9
DOI	https://doi.org/10.5281/zenodo.7819371
persistent identifier	https://treatment.plazi.org/id/DB7987E7-EB2F-FF82-FEC5-FAC2D9E9FD0A
treatment provided by	Felipe
scientific name	Ulva piritoka Ngāti Kuri, Heesch
status	sp. nov.

Treatment

Ulva piritoka Ngāti Kuri, Heesch & W.A. Nelson, sp. nov.

( Figs 2 View FIG ; 4 View FIG -6)

HOLOTYPE. — AK379911 , R.D’Archino, 19.IV.2013, 15 m depth ( Fig. 4 View FIG )

TYPE LOCALITY. — Tasman Bay, Manawatāwhi, New Zealand (34°9’13”S, 172°8’41.5”E).

DIAGNOSIS. — Thalli prostrate, 1-2 cm in diameter, attached to substrate by scattered clumps of rhizoids on the lower blade surface, margins unattached with a ruffled /undulating appearance ( Fig. 2 View FIG ). Thallus distromatic, cells rectangular; 45-55 µm thick at edge; becoming thicker in central regions (90-165 µm) with adaxial cell layer becoming deeper (80-100 µm) than the abaxial cell layer (40-60 µm). Rhizoids develop from both of the cell layers and join to form rhizoidal clumps 50-140 µm in diameter extending from the lower thallus surface to 180-220 µm in length ( Figs 5A, B View FIG ).

HABITAT. — Subtidal on rock and non-geniculate coralline algae, growing in patches on boulders, rocky reef and also found on stable cobbles and stones.

ETYMOLOGY. — piri (to stick, adhere, cling, keep close), toka (rock); in reference to the habit of this species, clinging tightly to the surface of rocks and withstanding the constant flow of current.

REPRESENTATIVE MATERIAL. — AK379910, R.D’Archino, 17.IV.13, TK2013-54, 14-19 m, 34°9’9”S, 172°8’58.2”E; ASN591,R.D’Archino, 17.IV.13, TK2013-51, 23-25 m, 34°9’14.8”S, 172°8’51.1”E.

COMMENTS

Underwater images from the islands show Ulva piritoka Ngāti Kuri, Heesch & W.A. Nelson, sp. nov. to occur commonly on a range of rocky substrata, sometimes forming extensive patches. It was seen to grow on bare rock as well as over nongeniculate corallines and also interspersed with sponge and other encrusting benthic species.