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8 results for “Gelidiella”
Figures 9–17 in Gelidiella papillosa sp. nov. (Gelidiellaceae, Rhodophyta) from Veracruz, Mexico, in the context of the worldwide distribution of G. acerosa
Figures 9–17: Gelidiella papillosa sp. nov. (9) UAMIZ-1438. Detail of main axis and branchlets showing darkened tips. Scale bar = 3 mm. (10) UAMIZ-1433. Fresh specimen showing detail of basal region of main axis with papillose bumps (arrows). Inset, enlargement of a bump. Scale bar = 1.5 mm. (11) UAMIZ-1432. Cross section of basal portion of main axis showing a papilla with depressed apex (arrow). Scale bar = 130 µm. (12) UAMIZ-1436. Cross section of basal portion of main axis showing development of papilla without evident apical cell, with blunt apex. Scale bar = 66 μm. (13) UAMIZ-1437. Cross section of main axis showing outer cortical cells (arrowheads), inner cortical cells (blue arrows) and medullary cells (black arrows). Scale bar = 15 µm. (14) UAMIZ-1433. Detail of fertile branch showing swollen stichidia at apices of branchlets (arrows). Scale bar = 1 mm. (15) UAMIZ-1432. Cross section through middle portion of fertile branchlet showing arrangement of tetrasporangia (arrows). Scale bar = 110 µm. (16) UAMIZ-1433. Cross section of fertile branchlet showing immature tetrasporangia arising from inner cortical cells (arrows) and premature development of tetrasporangia (arrowheads). Scale bar = 30 µm. (17) UAMIZ-1432. Cross section through middle portion of fertile branchlet showing mature tetrasporangia. Scale bar = 30 µm.
Figures 3–8 in Gelidiella papillosa sp. nov. (Gelidiellaceae, Rhodophyta) from Veracruz, Mexico, in the context of the worldwide distribution of G. acerosa
Figures 3–8: Gelidiella papillosa sp. nov. (3) Holotype specimen, tetrasporic plant. UAMIZ-1432. Scale bar = 1 cm. (4) UAMIZ-1435. Fresh specimen of tetrasporic plant showing general appearance of the thallus. Scale bar = 5 mm. (5) UAMIZ-1437. Vegetative plant showing branching pattern in erect axes arising from a decumbent stolon. Scale bar = 1 cm. (6) UAMIZ-1437. Cross section through middle part of an erect axis. Scale bar = 130 µm. (7) UAMIZ-1432. Tip of branchlet showing numerous superficial cortical hairs (arrows). Scale bar = 700 µm. (8) UAMIZ-1432. Detail of young branchlet showing apical cell (arrow). Scale bar = 200 µm.
Figure 2 in Gelidiella papillosa sp. nov. (Gelidiellaceae, Rhodophyta) from Veracruz, Mexico, in the context of the worldwide distribution of G. acerosa
Figure 2: Bayesian inference (BI) topology based on rbcL sequence data. BI values (left) followed by maximum likelihood (ML) bootstrap (right) on branches. Asterisks indicate full support (ML = 100 %, BI = 1.0 %), hyphens indicate values below 70 %. Vertical bars on right indicate results of three species delimitation methods: automatic barcoding gap detection (ABGD), the Bayesian variant of Poisson trees processes model (bPTP)and the general-mixed-Yule-coalescent (GMYC). SCI and SCII indicate the two subclades (subclade I and subclade II), G1-G6 indicates the genetic groups within Gelidiella acerosa. Sequences generated in this study are in bold type. S.P.S. = substitutions per site.
Figure 1 in Gelidiella papillosa sp. nov. (Gelidiellaceae, Rhodophyta) from Veracruz, Mexico, in the context of the worldwide distribution of G. acerosa
Figure 1: Bayesian inference (BI) topology based on COI-5P sequence data. BI values (left) followed by maximum likelihood (ML) bootstrap (right) on branches. Asterisks indicate full support (ML = 100 %, BI = 1.0 %), hyphens indicate values below 70 %. Vertical bars on right indicate results of three species delimitation methods: automatic barcoding gap detection (ABGD), the Bayesian variant of Poisson trees processes model (bPTP) and the general-mixed-Yule-coalescent (GMYC). SCI and SCII indicate two subclades (subclade I and subclade II), G1-G6 indicates genetic groups within Gelidiella acerosa. Sequences generated in this study are in bold type. S.P.S. = substitutions per site.
FIGURES 20–26 in Parviphycus bompardii sp. nov. and P. albertanoae (Gelidiales, Rhodophyta), two species misidentified as Gelidiella ramellosa in the Mediterranean Sea
FIGURES 20–26. Mediterranean herbarium specimens of Parviphycus albertanoae, previously misidentified as Gelidiella ramellosa. Figs 20–23. Herbarium specimens (MNHN! PC-PC0167206) from Kerkennah, Tunisia. Fig. 20. Herbarium sheet. Scale bar = 2.5 cm. Fig. 21. Apex of an upright branch of a specimen showing the distichous pattern of division of the subapical cells. Scale bar = 30 μm. Fig. 22. Transverse section of a compressed upright branch; five cells (axial and periaxials) are aligned along the major axis in an evident row. Scale bar = 27 μm. Fig. 23. Tetrasporangial sorus with tetrasporangia regularly arranged in transverse parallel rows (four per row). Scale bar = 180 μm. Figs 24–26. Herbarium specimens from the Cheradi Islands (CAT 1270). Fig. 24. Habit. Scale bar = 3 mm. Fig. 25. Transverse section of an erect axis. Scale bar = 17 μm. Fig. 26. Detail of a tetrasporangial sorus. Scale bar = 50 μm.
FIGURES 1–7 in Parviphycus bompardii sp. nov. and P. albertanoae (Gelidiales, Rhodophyta), two species misidentified as Gelidiella ramellosa in the Mediterranean Sea
FIGURES 1–7 Acrocarpus spinescens (Genoa, Italy), Erbario Crittogamico Italiano ser. II, No. 175. Fig. 1. Herbarium specimen held in SIENA, vegetative, referable to Gelidium crinale. Habit. Scale bar = 0.6 cm. Fig. 2. Refractive internal rhizoidal filaments observed in polarized light. Scale bar = 120 μm. Fig. 3. Brush-like hapteron. Scale bar = 150 μm. Fig. 4. Herbarium specimen held in BI. A). Vegetative thallus referable to Gelidium crinale. B). Vegetative thallus referable to Parviphicus albertanoae. Scale bar = 0.6 cm. Fig. 5. Herbarium specimen held in FI designated as holotype of Parviphycus bompardii sp. nov. (FI! 5607). Scale bar = 0.6 cm. Fig. 6. Stichidium-like tetrasporangial branchlets (FI! 5607). Scale bar = 0.4 cm. Fig. 7. Tetrasporangial sorus with tetrasporangia regularly arranged in chevrons (out of focus on purpose) (FI! 5607). Scale bar = 120 μm.
FIGURES 8–19 in Parviphycus bompardii sp. nov. and P. albertanoae (Gelidiales, Rhodophyta), two species misidentified as Gelidiella ramellosa in the Mediterranean Sea
FIGURES 8–19. Parviphycus bompardii sp. nov.. Fig. 8. Paratype (CAT! 71) (Castelluccio, Syracuse, Sicily). Scale bar = 3 mm. Fig. 9. Paratype (BI! 38467) (Mola di Bari, Bari, Apulia). Scale bar = 4 mm. Fig. 10. Apical part of an erect axis covered by hairs (paratype CAT! 71). Scale bar = 155 μm. Fig. 11. Apex of an upright branch showing the distichous pattern of division of the subapical cells (isoparatype BI! 38466). Scale bar = 30 μm. Fig. 12. Irregularly arranged outermost cortical cells in surface view (paratype CAT! 71). Scale bar = 8 μm. Fig. 13. Transverse section of a compressed upright branch; seven cells (axial and periaxials) are aligned along the major axis in an evident row (paratype BI! 38467). Scale bar = 50 μm. Fig. 14. Longitudinal section of an erect axis: elongated axial and periaxial filaments composing the medullary region are well distinct from the isodiametric subcortical cells (paratype BI! 38467). Scale bar = 50 μm. Fig. 15. Apical and lateral tetrasporangial sori inserted at 90º on the axes (paratype BI! 38467). Scale bar = 650 μm. Fig. 16. Stichidium-like tetrasporangial branchlets constricted at their bases and shortly stalked (paratype BI! 38467). Scale bar = 230 μm. Fig. 17. Tetrasporangial sorus with tetrasporangia regularly arranged in chevrons (6 per row) and a steril margin (paratype CAT! 71). Scale bar = 100 μm. Fig. 18. An empty sorus in surface view: in the gaps of the outer cortex the tetrasporangium basal cells are visible (arrow). Regenerated tetrasporocysts (arrowhead) (paratype BI! 38467). Scale bar = 60 μm. Fig. 19. Longitudinal section of tetrasporangial sorus along the medullary row of axial and periaxial filaments forming a cubic-mesh network (paratype BI! 38467). Scale bar = 60 μm.
FIGURE 4. A–E. Gelidiella acerosa. A in Morphological and molecular studies on Gelidiaceae and Gelidiellaceae (Gelidiales, Rhodophyta) from Brazil with description of the new species Gelidium calidum
FIGURE 4. A–E. Gelidiella acerosa. A. Detail of the apical portion showing the prominent apical cell (arrow) (SP469045). Scale bar = 25 μm. B. Cross section of the middle region of the main branch (SP469045). Scale bar = 100 μm. C. Detail of main branch showing the transition from the cortex to the medulla (SP469045). Scale bar = 25 μm. D. Detail of the tetrasporangial branch with tetrasporangia (SP469046). Scale bar = 100 μm. E. Cross section of the tetrasporangial branch, showing tetrasporangia cruciately divided, with no sterile margin (SP469046). Scale bar = 100 μm. F–J. Gelidiella flabella (SP469052). F. Apical cell slightly different from the surrounding cells (arrow). Scale bar = 25 μm. G. Cross section of the middle region of the main branch. Scale bar = 250 μm. H. Detail of the cross section of the thallus showing the transition from cortex to medulla. Scale bar = 25 μm. I. Holdfast originated as independent rizoidal filaments. Scale bar = 100 μm. J. Cross section of the stoloniferous branch showing the origin of rhizoidal filaments from the outer cortical cell (arrow). Scale bar = 25 μm. K–N. Millerella myrioclada (SP469055). K. Detail of the acute apex with prominent apical cell. Scale bar = 25 μm. L. Cross section of the middle region of the main branch, showing row of medullary cells (arrow). Scale bar = 25 μm. M.Prostrate system. Scale bar = 250 μm. N. Tetrasporangial branch. Scale bar = 100 μm.
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