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81 results for “red algae”
FIGURE 10–13. Hydrolithon reinboldii. FIGURE 10 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil
FIGURE 10–13. Hydrolithon reinboldii. FIGURE 10. External morphology (RB 493708). Scale bar = 1 cm. FIGURE 11. Longitudinal section showing a single layer of rounded epithallial cells (e), subepithallial initials (s) and cell fusions between adjacent filaments (white arrow) (RB 493709) Scale bar = 100 μm. FIGURE 12. Magnified view of a tetrasporangial conceptacle roof showing the enlarged cells (E, white arrow) lining the pore canal and the pore canal opening sunken slightly below the thallus surface (black arrow) (RB 493709). Scale bar = 10 μm. FIGURE 13. Longitudinal section through a tetrasporangial conceptacle showing zonately divided tetrasporangia (te) (RB 493709). Scale bar = 50 μm.
FIGURES 2–5. Lithophyllum corallinae. FIGURE 2 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil
FIGURES 2–5. Lithophyllum corallinae. FIGURE 2. External morphology (RB 587132). Scale bar = 1 cm. FIGURE 3. Longitudinal section showing dimerous thallus construction (white arrow) (RB 587133). Scale bar = 100 μm. FIGURE 4. Longitudinal section showing a single layer of rounded to elliptical epithallial cells (e), subepithallial initials (s) and secondary pit connections between adjacent filaments (white arrow) (RB 587133). Scale bar = 20 μm. FIGURE 5. Longitudinal section through a tetrasporangial conceptacle showing the
FIGURE 1 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil
FIGURE 1. Ilha Grande Bay with study sites: Rochedo de São Pedro (1), Parcel dos Meros (2), Flechas Island (3), Ponta do Acaiá (4) Queimada Grande Island (5), Jorge Grego Island (6) and Comprida Island (7).
FIGURE 2 in Taxonomic transfer of the red algae Chrysymenia enteromorpha and C. wrightii to the genus Botryocladia (Rhodymeniaceae, Rhodymeniales)
FIGURE 2. Phylogram showing Botryocladia and Chrysymenia species inferred from Bayesian analysis of 22 SSU sequences, using Rhodymenia species as the outgroup taxa. Support values reflect all bootstrap values (parsimony, neighbor joining, maximum likelihood, except for Bayesian Posterior Probabilities).
FIGURE 1 in Taxonomic transfer of the red algae Chrysymenia enteromorpha and C. wrightii to the genus Botryocladia (Rhodymeniaceae, Rhodymeniales)
FIGURE 1. Phylogram inferred from RaxML analysis of 64 rbcL sequences of Rhodymeniales. The ingroup consists of 61 sequences of Rhodymeniaceae, the outgroup one representative of 3 families in the Rhodymeniales. The position of Chrysymenia enteromorpha and C. wrightii is nested inside the Botrycladia clade that includes the generitype, B. botryoides, separate from the Chrysymenia clade that includes the generitype, C. ventricosa. Numbers indicate bootstrap values at right, and BP values at left (1 represented by 100); *denotes full support. Scale bar indicates number of substitutions per site. Newly generated sequences are shown in bold.
FIGURES 3–14 in Taxonomic transfer of the red algae Chrysymenia enteromorpha and C. wrightii to the genus Botryocladia (Rhodymeniaceae, Rhodymeniales)
FIGURES 3–14. Botryocladia enteromorpha (Harvey) W.E. Schmidt, C. Lozada-Troche, D.L. Ballantine et Fredericq, comb. nov. Vicinity of the Florida Middle Grounds: Figs. 2, 12–13.LAF-NSF-III-7-9-06-9-2, Fig. 3. LAF-NSF-III-7-5-06-3-7. Campeche Banks: Figs. 4–10, LAF-NSF-II-78-3, Fig. 11. LAF-NSF-II-96-21. 3) Habit of female gametophyte with cystocarps. Scale bar 2 cm. 4) Habit of non-reproductive thallus. Scale bar 1 cm. 5) Surface view of young branch on main axis with constricted base (arrow). Scale bar 40 μm. 6) Surface view of mature specimen with nearly complete cortication. Scale bar 40 μm. 7) Surface view of younger specimen with incomplete cortication except for glandiferous cells bearing gland cells (arrow). Scale bar 40 μm. 8) Surface view of medullary, glandiferous, and gland cells (arrow). Scale bar 40 μm. 9) Cross section through vesicle wall with glandiferous cell bearing three gland cells (arrow). Scale bar 40 μm. 10) Cross section through holdfast. Scale bar 0.5 mm. 11) Organization of cortical and medullary cells in holdfast cross section. Scale bar 100 μm. 12) Surface view of cortex with cruciately divided tetrasporangia (arrowhead). Scale bar 40 μm. 13) Surface view of pericarp ostiole topping carposporophyte. Scale bar 100 μm. 14) Longitudinal section through carposporophyte. Scale bar 100 μm.
FIGURES 15–22 in Taxonomic transfer of the red algae Chrysymenia enteromorpha and C. wrightii to the genus Botryocladia (Rhodymeniaceae, Rhodymeniales)
FIGURES 15–22. Botryocladia wrightii (Harvey) W.E. Schmidt, D.L. Ballantine et Fredericq, comb. nov., from Henashi, Aomori-ken, Japan, MY 18-054. 15) Habit of non-reproductive plant. 16) Surface view of thallus showing complete cortication. Scale bar 40 μm. 17) Cross section through mid thallus region showing pigmented cortical cells and hyaline medullary cells. Scale bar 40 μm. 18) Cross section through middle portion of thallus region, showing irregular gland cell (arrowhead) on modified glandiferous medullary cell. Scale bar 40 μm. 19) Cross section through mid thallus region showing cortical cells, and medullary cell giving rise to internal filament (arrow). Scale bar 40 μm. 20) Medullary cell and internal filament (arrows). Scale bar 40 μm. 21) Cross section through middle part of holdfast showing cortical cells and medullary cells with dense aggregations of internal filaments. Scale bar 0.25 mm. 22) Internal medullary filaments in mid holdfast region, with pit-connection (arrowhead) linking one cell to a large medullary cell. Scale bar 40 μm.
FIGURES 23–30 in Taxonomic transfer of the red algae Chrysymenia enteromorpha and C. wrightii to the genus Botryocladia (Rhodymeniaceae, Rhodymeniales)
FIGURES 23–30. Botryocladia occidentalis from Bocas del Toro, Panama, LAF-8-17-09-1-10. 23). Habit of specimens in situ. Scale bar 2 cm. 24) Habit of female gametophyte with cystocarps. Scale bar 1 cm. 25). Cross section through axis. Scale bar 50 μm. 26) Surface view of vesicle with complete cortication. Scale bar 50 μm. 27) Cross section through vesicle showing cortical and medullary cell layers. Scale bar 25 μm. 28) Surface view of medullary cells bearing gland cells (arrows). Scale bar 50 μm. 29) Cross section through vesicle showing gland cells (arrows) borne on unmodified medullary glandiferous cells. Scale bar 50 μm. 30) Raised carposporophyte (arrow)
FIGURE 1 in Genetic barcoding resolves the historically known red alga Champia parvula from southern New England, USA, as C. farlowii sp. nov. (Champiaceae, Rhodymeniales)
FIGURE 1. Distance analysis of the COI-5P barcode region using UPGMA for Champia species. Sequences other than C. farlowii and C. parvula are collapsed based on the automated barcode gap analysis. The arrow shows the gap in the distance histogram that was used to collapse nodes.
FIGURES 3–10 in Genetic barcoding resolves the historically known red alga Champia parvula from southern New England, USA, as C. farlowii sp. nov. (Champiaceae, Rhodymeniales)
FIGURES 3–10. Champia farlowii sp. nov. 3. P.B.-A. no. 592, as Champia parvula, from Massachusetts (Collins et al., 1899). Scale bar = 4 cm. 4. Holotype specimen [EC059] from Charleston, Rhode Island. Scale bar = 2 cm. 5. Apex of branch in longitudinal section showing single-layered septa between nodes, and longitudinal filaments bearing a gland cell (arrow) [CWS 94-3-5]. Scale bar = 200 μm. 6. Cortex of node showing complete lower layer and incomplete outer layer [CWS 09-39-7]. Scale bar = 50 μm. 7. Axial view showing branch originating in internode (arrow) [CWS 1318]. Scale bar = 100 μm. 8. Surface view showing tetrahedral sporangia in outer cortex [CWS 1318]. Scale bar = 50 μm. 9. Nodes showing one and many clustered cystocarps [CWS 1029]. Scale bar = 500 μm. 10. Longitudinal section of cystocarp demonstrating the 'tela arachnoidea' formed between carposporophyte (not shown) and pericarp wall [CWS 1029]. Scale bar = 500 μm.
FIGURE 2 in Genetic barcoding resolves the historically known red alga Champia parvula from southern New England, USA, as C. farlowii sp. nov. (Champiaceae, Rhodymeniales)
FIGURE 2. Phylogeny of the Champiaceae based on maximum-likelihood (ML) analysis of rbcL sequences with bootstrap values (1000 replicates). Champia farlowii is distinct from C. parvula from near the type locality (Spain) and a re-examination of C. parvula in the Caribbean Sea and Gulf of Mexico is warranted.
FIGURE 2 in A catalogue and bibliography of non-marine (freshwater and estuarine) Rhodophyta (red algae) of India
FIGURE 2. Biogeographic Provinces (1-10) of India (After Rodgers & Panwar, 1988). 1. Trans-Himalayan (Tundra Valley, Lakes and Marshes); 2A. North-western Himalaya (Alpine); 2B. Western Himalaya (Temperate Coniferous); 2B. Eastern Himalaya; 2C. Central Himalaya (Temperate broadleaf); 3A. Desert Kutch (salt flats and scrub); 3B. Desert (The desert salt flats, grass and scrub); 4A. SemiArid (Dry deciduous and wetland); 4B. Semi-Arid (Dry deciduous and hilly, thorny, scrubland); 5A. Malabar Topical Forests (Evergreen moist deciduous and wetland); 5B. Western Ghats (Evergreen, moist deciduous Grasslands, montane forest, and wetland); 6A. Deccan Plateau (Dry deciduous and thorn forest); 6B. Central Plateau (Sub-tropical dry, and moist deciduous); 6C. Central Highlands (Sub-Tropical, dry and moist deciduous); 6D: Eastern Plateau (Sub-tropical and moist deciduous); 6E. Chhota Nagpur Plateau (Dry moist deciduous); 6F. Deccan South; 7. Gangetic Plain (Teral, Wetland and alluvial); 8. Northeast India (Alluvial, evergreen forest and wetland); 9. A &B. Andaman & Nicobar Islands (Evergreen forest, moist deciduous); 9C. Islands (Scrubland, and Coastal); 10A. West coast (Mangrove, brackish water and lagoon); 10B. East Coast (Mudflat and sandy, rocky littoral).
FIGURE 3. A in A catalogue and bibliography of non-marine (freshwater and estuarine) Rhodophyta (red algae) of India
FIGURE 3. A. Distribution of four freshwater taxa based both on morphological and molecular data. B. Distribution of six freshwater genera whose presence in India is provisional pending morphological and molecular data.
FIGURES 51–64. 51–53. Gracilaria usneoides. 51 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico
FIGURES 51–64. 51–53. Gracilaria usneoides. 51. Habit. Scale bar = 3 cm. 52. Medullary and cortical cells. Scale bar = 260 μm. 53. Mature cystocarp. Scale bar = 420 μm. 54–55. Gracilariopsis tenuifrons. 54. Habit. Scale bar = 4 cm. 55. Medullary and cortical cells. Scale bar = 170 μm. 56–58. Codiophyllum sp. 56. Habit. Scale bar = 4 cm. 57. Apices with small ligules. Scale bar = 5 cm. 58. Medullary filaments and cortical cells. Scale bar = 120 μm. 59–61. Halymenia pseudofloresii. 59. Habit. Scale bar = 4 cm. 60. Medullary filaments and cortical cells. Scale bar = 460 μm. 61. Tetrasporangium in cortex. Scale bar = 40 μm. 62–64. Botryocladia occidentalis. 62. Habit. Scale bar = 4 cm. 63. Medullary and cortical cells in cylindrical axes. Scale bar = 300 μm. 64. Medullary and cortical cells in globular branches. Scale bar = 150 μm.
FIGURES 39–50. 39–41. Gracilaria cornea. 39 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico
FIGURES 39–50. 39–41. Gracilaria cornea. 39. Habit. Scale bar = 4 cm. 40. Medullary and cortical cells. Scale bar = 250 μm. 41. Tetrasporangia in cortex. Scale bar = 30 μm. 42–43. Gracilaria flabelliformis. 42. Habit. Scale bar = 1.5 cm. 43. Medullary and cortical cells. Scale bar = 260 μm. 44–45. Gracilaria mammillaris. 44. Habit. Scale bar = 2 cm. 45. Medullary and cortical cells, and a mature cystocarp. Scale bar = 200 μm. 46–48. Gracilaria microcarpa. 46. Habit. Scale bar = 3 cm. 47. Medullary and cortical cells. Scale bar = 130 μm. 48. Mature cystocarp. Scale bar = 60 μm. 49–50. Gracilaria tikvahiae. 49. Habit. Scale bar = 2 cm. 50. Medullary and cortical cells. Scale bar = 130 μm.
FIGURES 17–27. 17 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico
FIGURES 17–27. 17. Laurencia intricata. Medullary and cortical cells. Scale bar = 30 μm. 18–19. Yuzurua poiteaui var. gemmifera. 18. Habit. Scale bar = 3cm. 19. Pericentral, medullary and cortical cells. Scale bar = 120 μm. 20–21. Hypnea musciformis. 20. Habit. Scale bar = 2 cm. 21. Medullary and cortical cells. Scale bar = 120 μm. 22–26. Eucheumatopsis isiformis. 22. Habit. Scale bar = 4 cm. 23. Medullary filaments and cortical cells. Scale bar = 460 μm. 24. Mature cystocarp. Scale bar = 110 μm. 25. Tetrasporangium laterally attached. Scale bar = 25 μm. 26. Habit with smooth surfaces. Scale bar = 10 cm. 27. Meristotheca cylindrica. Habit. Scale bar = 4 cm.
FIGURE 1 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico
FIGURE 1. Map of the Yucatan Peninsula showing the sites where red algal drifts were collected. Black dots indicate the location of the sampling sites (GPS coordinates are indicated in Table 1). The numbers correspond to the names of the sites.
FIGURES 2–5 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico
FIGURES 2–5. Algal drifts in the Yucatan Peninsula. 2–3. Campeche coasts with high biomass. 2. Scale bar = 50 cm. 3. Scale bar = 2 m. 5–6. Yucatan coasts with low biomass. 5. Scale bar = 1 m. 6. Scale bar = 30 cm.
FIGURES 28–38. 28–29. Meristotheca cylindrica. 28 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico
FIGURES 28–38. 28–29. Meristotheca cylindrica. 28. Medullary filaments and cortical cells. Scale bar = 140 μm. 29. Immature cystocarp. Scale bar = 220 μm. 30–32. Tepoztequiella rhizoidea. 30. Habit. Scale bar = 3.5 cm. 31. Medullary filaments and cortical cells. Scale bar = 90 μm. 32. Tetrasporangia basally attached (arrowhead). Scale bar = 30 μm. 33–34. Gracilaria blodgettii. 33. Habit. Scale bar = 2 cm. 34. Medullary and cortical cells. Scale bar = 140 μm. 35–36. Gracilaria caudata. 35. Habit. Scale bar = 4 cm. 36. Medullary and cortical cells and a mature cystocarp. Scale bar = 310 μm. 37–38. Gracilaria cervicornis. 37. Habit. Scale bar = 3 cm. 38. Medullary and cortical cells. Scale bar = 150 μm.
FIGURES 6–16. 6 in Marine red algae (Rhodophyta) of economic use in the algal drifts from the Yucatan Peninsula, Mexico
FIGURES 6–16. 6. Jania pumila, main axes showing genicula, intergenicula and branching pattern. Scale bar = 5 mm. 7–8. Acanthophora spicifera. 7. Habit. Scale bar = 2 cm. 8. Medullary and cortical cells. Scale bar = 70 μm. 9–10. Alsidium seaforthii. 9. Habit. Scale bar = 2 cm. 10. Pericentral, medullary and cortical cells. Scale bar = 100 μm. 11–12. Alsidium triquetrum. 11. Habit. Scale bar = 3 cm. 12. Pericentral and medullary cells. Scale bar = 145 μm. 13–14. Digenea simplex. 13. Habit. Scale bar = 3.5 cm. 14. Pericentral and medullary cells. Scale bar = 110 μm. 15–16. Laurencia intricata. 15. Habit. Scale bar = 2 cm. 16. Superficial cherry bodies. Scale bar = 50 μm.
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