taxonID	type	description	language	source
03E187F50157FFC4FF4FBFC6C9F3FD94.taxon	materials_examined	Type: — ITALY. Sardini, circa San Giovanni Sinis, in aquis stag., 39 ° 53 ’ 13 N, 8 ° 26 ’ 22 E, WGS 84, 05 April 2018, Becker 2018 (Herb. ROST).	en	Casanova, Michelle T., Becker, Ralf (2022): Lamprothamnium sardoum sp. nov. (Characeae, Streptophyta): A new species of Lamprothamnium for Europe. Phytotaxa 567 (3): 269-277, DOI: 10.11646/phytotaxa.567.3.6, URL: http://dx.doi.org/10.11646/phytotaxa.567.3.6
03E187F50157FFC4FF4FBFC6C9F3FD94.taxon	description	The monoecious plants are small to medium – sized (9 – 17 cm including the protonema), light green, opaque and not incrusted, with well developed, long stipulodes and bract-cells (Fig. 1 B, C). The bright orange gametangia are clustered inside and outside the base of the whorl and on the lowest branchlets (Fig. 2 B), and are abundant and obvious, even in situ in the habitat (Fig 2 A). Plants grow as individual shoots, fertile at nearly all nodes, with long whispy protonemal axes longer than the height of the plants (Fig. 1 B). Axes narrow, 350 – 600 µm in diameter (usually 375 – 550 µm), ecorticate, internodes 1 – 3.2 cm long except in the apicies. Stipulodes, up to one per branchlet (but frequently replaced by gametangia; Fig. 1 A), up to 1.75 mm long, downward and outward pointing where present. Branchlets 5 to 8 in a whorl, up to 1.8 cm long, basal branchlet cell short on fertile branchlets, up to 2 mm long (Fig. 1 C), sterile branchlets not seen. Branchlet end segments usually 1 cell, up to 750 µm long, mucronate (Fig. 2 D). Bract cells verticillate (4 or 5 around) on the lowest two or three branchlet nodes in fertile whorls, up to 1.7 mm long (Fig. 2 C). Gametangia clustered inside and outside the base of the whorl and conjoined, geminate or geminate-conjoined on the lowest 2 – 3 branchlet nodes (Fig. 1 A). Oogonia bright orange (Fig. 2 B), apparently sessile, clustered inside and outside the base of the whorl, and when occurring on the branchlets, usually conjoined with antheridia, below or beside the antheridium, 500 – 750 µm long, 400 – 600 µm wide (only dry material was measured), with 10 – 14 convolutions (Fig. 1 D). Coronula 75 – 110 µm long, 130 – 150 µm wide, coronula cells oval-shaped (Fig. 1 E). Oospores black, 510 – 650 µm long, 250 – 475 µm wide at the widest point, with 9 – 11 striae of low ridges, ornamentation smooth (Fig. 3, Fig. 2 E). Antheridia 325 – 450 µm in diameter, orange, solitary or conjoined with oogonia on the branchlets (Fig. 1 D), as well as inside and outside the base of the whorl. Vegetative reproduction not known. Chromosomes not known.	en	Casanova, Michelle T., Becker, Ralf (2022): Lamprothamnium sardoum sp. nov. (Characeae, Streptophyta): A new species of Lamprothamnium for Europe. Phytotaxa 567 (3): 269-277, DOI: 10.11646/phytotaxa.567.3.6, URL: http://dx.doi.org/10.11646/phytotaxa.567.3.6
03E187F50157FFC4FF4FBFC6C9F3FD94.taxon	etymology	Etymology: The specific epithet is named for the island of Sardinia where collection was made.	en	Casanova, Michelle T., Becker, Ralf (2022): Lamprothamnium sardoum sp. nov. (Characeae, Streptophyta): A new species of Lamprothamnium for Europe. Phytotaxa 567 (3): 269-277, DOI: 10.11646/phytotaxa.567.3.6, URL: http://dx.doi.org/10.11646/phytotaxa.567.3.6
