taxonID	type	description	language	source
E8738509A547FFAA3DF7FBA6A5ECB4CF.taxon	materials_examined	Holotype: TCD (Harvey, Travelling Set no. 187). Note: Specimens included in Harvey’s Travelling Set are not available for loan (Parnell et al. 2010). However, Womersley visited TCD in 1952 to examine the Harvey herbarium and his account of the species (Womersley 1979) would have incorporated observations of type material. We therefore accept his description as representative of authentic P. scopulorum. Type locality: Rottnest Island, Western Australia (Harvey 1855). Molecular vouchers: GenBank accession numbers MF 139308, MF 139309, MF 139310. Specimens examined: AUSTRALIA. Western Australia: Fays Bay, Rottnest Island, 31 ° 59´16 ˝ S, 115 ° 31´31 ˝ E, 11 November 2015, 151111 # 24 - 26 (JNUB).	en	Huisman, John M., Kim, Byeongseok, Kim, Myung Sook (2017): The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia. Phytotaxa 324 (1): 51-62, DOI: 10.11646/phytotaxa.324.1.3, URL: http://dx.doi.org/10.11646/phytotaxa.324.1.3
E8738509A547FFAA3DF7FBA6A5ECB4CF.taxon	description	Description: — Plants form dense tufts, 0.7 – 1 cm high, epilithic, brownish or yellowish red in color (Fig. 2 A), with a prominent prostrate basal system from which erect axes arise endogenously every 4 – 6 segments of prostrate axes (Fig. 2 B, C). Prostrate axes are attached to the substratum by unicellular rhizoids arising from the center of pericentral cells in open connection with them (Fig. 2 D, E). Prostrate axes are terete, ecorticate, 60 – 80 μm in diameter with a segment length / diameter (L / D) ratio of 0.9 – 1.5 (Fig. 2 E). Erect branches are simple or several times forked, terete, ecorticate, 70 – 80 μm in diameter with each axial cell bearing 4 pericentral cells (Fig. 2 F, G & H). Segment L / D is 0.8 – 1.6 in lower segments, 1.4 – 2.1 in mid branch and 0.6 – 0.8 toward apices. A few lateral branches arise exogenously or endogenously from the apex of erect axes (Fig. 2 J – M), not associated with trichoblasts. Pericentral cells of erect axes include abundant discoidal rhodoplasts (Fig. 2 H, I). Apical cells are dome shaped, 10 – 13 μm long and 12 – 13 μm in diameter (Fig. 2 N). Vegetative trichoblasts or scar cells are formed one per segment, infrequently on lower parts of erect branches, and more frequent near the apices (Fig. 2 G, O, P). Vegetative trichoblasts are 2 – 3 times dichotomously branched, 400 – 750 μm long and 25 – 30 μm in diameter (Fig. 2 O). Adventitious branches develop from the mid or lower parts of erect axes (Fig. 2 Q). Tetrasporangia form one per segment in upper parts of erect axes, arranged in a slightly spiral series (Fig. 2 R, S, U). Tetrasporangia are subspherical, 50 – 60 μm in diameter, with two presporangial cover cells (Fig. 2 R, T). Gametophytes were not observed.	en	Huisman, John M., Kim, Byeongseok, Kim, Myung Sook (2017): The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia. Phytotaxa 324 (1): 51-62, DOI: 10.11646/phytotaxa.324.1.3, URL: http://dx.doi.org/10.11646/phytotaxa.324.1.3
E8738509A547FFAA3DF7FBA6A5ECB4CF.taxon	distribution	Distribution: — Womersley (1979) recorded P. scopulorum as occurring from Rottnest Island (“ probably further north ”) to Lawrence Rock, Victoria, later (Womersley 2003) broadening this to the Dampier Archipelago in Western Australia and several locations in eastern Australia, north to southern Queensland. The Dampier Archipelago record has been found to represent an undescribed species (Huisman, unpublished observations) and in light of the results of the present study many other records require confirmation. Records from non-Australian locations (see Guiry & Guiry 2017, for sources) should similarly be viewed cautiously. Habitat: — Our newly collected specimens were growing on rock with sand in the lower intertidal zone, which agrees with Harvey’s (1855) “ on littoral rocks ” description of the species’ habitat. According to Womersley (2003), plants occur mainly intertidal on rough-water rock surfaces exposed to surf, or in relatively calm localities, usually lower sublittoral, occasionally sublittoral on older axes of the brown alga Scaberia agardhii.	en	Huisman, John M., Kim, Byeongseok, Kim, Myung Sook (2017): The phylogenetic position of Polysiphonia scopulorum (Rhodomelaceae, Rhodophyta) based on molecular analyses and morphological observations of specimens from the type locality in Western Australia. Phytotaxa 324 (1): 51-62, DOI: 10.11646/phytotaxa.324.1.3, URL: http://dx.doi.org/10.11646/phytotaxa.324.1.3
