Lithophyllum socotraense, Basso & Caragnano & Gall & Rodondi, 2015
publication ID |
https://doi.org/ 10.11646/phytotaxa.208.3.1 |
DOI |
https://doi.org/10.5281/zenodo.13642565 |
persistent identifier |
https://treatment.plazi.org/id/03C43948-EC65-492F-B3C8-FE6BFB6B14BC |
treatment provided by |
Felipe |
scientific name |
Lithophyllum socotraense |
status |
sp. nov. |
Lithophyllum socotraense sp. nov.
Figure 10 View FIGURE 10 ; Table 3
HOLOTYPE: sample DB635 (leg. Caragnano: Socotra, 15.iii.2010) including stub 09062010b6 and histological slide DB635- SO20 b, conserved in TRH ( TRH-A3881 ).
ETYMOLOGY: the specific epithet refers to the type locality, the island of Socotra, Yemen.
TYPE LOCALITY: Yemen, Indian Ocean, Ras Adho on the NE coast of Socotra Island, 22 m depth.
MATERIAL EXAMINED: Indian Ocean , NE Socotra Island: Rosh, 16 m, samples DB615-616 (leg. Caragnano: 12.iii.2010) ; Ras Adho , 22 m (the holotype) and 13 m (sample DB636 ) (leg. Caragnano: 16.iii.2010) .
HABITAT AND PHENOLOGY: plants unattached as rhodoliths, enveloping coral fragments at nucleus, at depth> 12 m.
GEOGRAPHIC DISTRIBUTION: L. socotraense nov. sp. is known only from the NW Indian Ocean, Socotra Island.
HABIT AND VEGETATIVE STRUCTURE: Plants non-endophytic, with warty to lumpy growth form. The protuberances have a smooth surface, up to about 5 mm long and about 3–6 mm wide ( Fig. 10A View FIGURE 10 ).
Plant structure pseudoparenchymatous ( Fig. 10B–C View FIGURE 10 ). Basal or ventral layer (= hypothallium) dimerous ( Fig. 10D View FIGURE 10 ). Hypothallial cells 15–18 μm long and 11–18 μm in diameter ( Tab. 3). Peripheral region (= perithallium) composed of filaments of cells curving outwards toward the thallus surface, 12–23 μm long and 10–13 μm in diameter ( Fig. 10C– D View FIGURE 10 ). Cells of adjacent filaments joined by secondary pit-connections, cell fusions not observed ( Fig. 10D–F View FIGURE 10 ). Palisade cells not observed. Single trichocytes 22–58 μm long and about 12–13 μm in diameter, abundantly distributed in the perithallium and at the thallus surface ( Fig. 10C, E View FIGURE 10 ). Single epithallial cells flattened, about 7–15 μm in diameter and 2–5 μm long ( Fig. 10F View FIGURE 10 ).
REPRODUCTION: Uniporate tetrasporangial conceptacle chambers protruding over the surrounding thallus surface, becoming buried in the thallus, 180–250 μm in diameter and 60–90 μm high, with pore-canal 45–60 μm long ( Fig. 10G–H View FIGURE 10 ; Tab. 3). Floor of the conceptacle chamber convex upward below a central columella. The conceptacle chamber floor is 9–11 cells below the thallus surface. Roof filaments 4–5 cells long, including the terminal epithallial cell ( Fig. 10H View FIGURE 10 ; Tab. 3). Gametangial and carposporangial conceptacles not found.
REPRESENTATIVE SEQUENCES: KP696790 (LSU), KP976402 (CO1) & KP976409 (psb A).
TRH |
Norwegian University of Science and Technology - Herbarium |
NE |
University of New England |
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