Ulva adhaerens Matsumoto & Shimada
Creators: name: Lee, Hyung Woo
name: Kim, Eun Hee Bae and Myung Sook
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Chlorophyta
Ulvophyceae
Ulvales
Ulvaceae
Ulva
Ulva adhaerens

description: Ulva adhaerens Matsumoto & Shimada (Fig. 3A -N)
Holotype. TNS-AL183435; TNS (Matsumoto and Shimada, 2015: 107, Fig. 60).
Type locality. Tenjin-jima, Sajima, Yokosuka, Kanagawa prefecture, Japan.
Korean name. ñģŭâ래 (Ę ḑljḡ): The Korean specific epithet, yeonjeop, is means “connected each other” in reference to the adherence between blades by the haptera of bundles of rhizoidal filaments arising from the cells of the ventral layer of the upper blade.
Habitat. Epilithic or epiphytic from the intertidal area (Matsumoto and Shimada, 2015) to the subtidal zone, up to 15 m deep (this study).
Distribution. Jeju Island, Korea (this study); Japan (Matsumoto and Shimada, 2015).
Specimens examined. MSK-GA00073 (Fig. 3B), MSK-GA00074, MSK-GA00075, Munseom, Jeju Island, Korea, Jan. 30, 2013 (deposited in JNUB); NIBR AL0000117920, Munseom, Jeju Island, Korea, Feb. 11, 2009, NIBR AL 00 00117921, Feb. 11, 2009, NIBR AL0000118004, Nov. 13, 2009, NIBR AL0000118012, May 13, 2009 (deposited in KB).
Other examined specimens. MSKL160414-17-1, MSKL-160414-17-2, MSKL-160414-17-3, MSKL-160 414-17-4, and MSKL160414-17-5, Apr. 14, 2016 (deposited in JNUB).
DNA sequence data. rbc L, MSK-GA00073 (MT978111), MSK-GA00074 (MT978112), MSK-GA00075 (MT978 113); tuf A, MSK-GA00073 (MT978120), MSK-GA 00074 (MT978121), MSK-GA00075 (MT978122); 18S rRNA, MSK-GA00073 (MT978102), MSK-GA00074 (MT978103), MSK-GA00075 (MT978104).
Habit and vegetative morphology. Thallus growing on various substrates such as rocks, shells, small or heavy benthic invertebrates, and cartilaginous marcroalga or geniculate corallines in the subtidal (Fig. 3A). Thallus distromatic, foliose, and lobed (Fig. 3B); composed of several blades up to 5-7 one like a blossom; growing 5-6 cm in diameter up to 10 cm (Fig. 3B); attached by numerous minute discoidal plates without a distinct holdfast. Blade light-green to green in color (Fig. 3A). Blade margin slightly ruffled, entire, or slightly uneven without marginal denticulation (Fig. 3C). In the surface view, having polygonal to subspherical cell shape at the upper and middle part of blades, ranging 8-12 × 10-16 wide (Fig. 3D); more and more polygonal shape toward the basal region, ranging 10-22 × 20-40 wide (Fig. 3E). Each cell containing one or two pyrenoids (Fig. 3E), cells irregularly arranged throughout the thallus (Fig. 3D, E). In the transverse section, distromatic thallus composed of entirely cuboidal cells (Fig. 3F- H): 24-32 μm long× 6-15 μm wide, both dorsal and ventral at upper; 30-35 μm long × 6-15 μm wide, dorsal, and 25-30 μm × 6-15 μm wide, ventral, at middle; 40-50 μm long × 10-15 μm wide, dorsal, and 20-30 μm long × 15-25 μm wide, ventral at the base. Blade gradually thickened from upper to base, 48-64 μm at upper, 55-65 μm at middle, 60-80 μm at the base. At the basal blades, sequentially, numerous rhizoids budded off from the ventral-side cells (Fig. 3L); the interwoven rhizoidal bundle growing outside downwardly (Fig. 3M); a minute discoidal plate to attach on the substratum (Fig. 3N).
description: Published as part of Lee, Hyung Woo & Kim, Eun Hee Bae and Myung Sook, 2022, The first record of Ulva adhaerens (Ulvaceae, Chlorophyta) from Jeju Island, Korea, pp. 266-277 in Journal of Species Research 11 (4) on pages 270-272, DOI: 10.12651/JSR.2022.11.4.266, http://zenodo.org/record/13139882