Stipellula nitens Roser & Hamasha
Stipellula nitens (Ball) Röser & Hamasha (Figure 65 (2)). Lemma dorsal surface: Characterised by rectangular to quadrangular long cells of (4–) 5–9(–11) × 10–12(–14) µm, smooth to undulated walls, 4–6 µm thick, linear distribution. Short cells: main Silica cells (8–)10–16(–18) × (9–)10– 14(–17) µm, circular to ovoid, frequently solitary, occasionally in pairs or threes with cork cells, between long cells, density 65–78(–82) silica cells/100 µm 2; Cork cells (2–)4–7(–8) × 12–18 µm, fusiform to reniform, sporadic, in all cases with a silica cell. Spines and hairs: Hooks not studied; Prickles not studied; Macro-hairs 500–1200(1450) µm long, circular to obovate base 21–34(–36) × 20–28(–30) µm, irregularly distributed across entire surface. Lemma apical surface: Characterised by similar long cell morphology, wall characteristics and distribution, length to 32 µm. Short cells: Silica cells equal in size, morphology and distribution, lower density of 41 silica cells/100 µm 2; Cork cells of equal size, morphology, distribution and density. Spines and hairs: Hooks circular to ovoid base 16–22(–26) × 14–20(–25) µm, sporadic, solitary, occasionally with a silica cell, low density <4 hooks/100 µm 2; Prickles obovate to circular base (17–)20–28(–31) × 18–26(–28) µm, and up to 35 µm long, irregularly distributed between long cells, solitary, density <2 prickles/100 µm 2; Macro-hairs equal in size, morphology and distribution, more frequent at distal part of lemma apex. Material studied: Morocco: Demnate, Marrakech, 2230 m.a.s.l., 10-VI-2021, M. Chamboleyron, ECWP n.n.; Tizi a’Tichka, 2270 m.a.s.l., 30-VI-2020, M. Chamboleyron, ECWP n.n.
Institutions
- Mohammed V University (MA)
- Government of Extremadura (ES)
Publication Details
- Journal
- Zenodo (CERN European Organization for Nuclear Research)
- Published
- 2025-05-06
- DOI
- https://doi.org/10.5281/zenodo.16727733
- Primary Topic
- Diatoms and Algae Research
- Type
- article
- Field-Weighted Citation Impact
- 0.00