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9 results for “Meristotheca”
FIG. 3 in Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, sp. nov. (Solieriaceae, Rhodophyta) a new cylindrical species from the southwestern Gulf of Mexico
FIG. 3. Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, sp. nov.: A, cross section showing a filamentous medulla (arrow) surrounded by cortical cells (white arrow); B, Longitudinal section showing medullary filaments (arrow) running parallel to the main axes and cortical cells; C, Medullary filaments with numerous rhizoids (arrows); D, Inner cortical cells interconnected by small cortical connective filaments (arrow) and secondary pit connections (white arrow); E, Outer cortical cells interconnected by primary pit connections (arrows); F, Tetrasporangia arising from outer cortical cells; G, Tetrasporangia arising from a four-celled cortical filament (arrow); H, Branch with short laterals bearing cystocarps (arrows); I, Nutritive cell clusters formed from vegetative cells around the diploidized auxiliary cell (white arrows); J, Mature cystocarp arising from medullary filaments cells: auxiliary cell (arrow) and enveloping tissue (white arrows); K, Mature cystocarp showing the pericarp (white arrows), sterile gonimoblast cells (gc), and chains of carpospores (cp). Scale bars: A, B, 150 µm; C, 70 µm; D, 100 µm; E, I, 60 µm; F, 80 µm; G, 40 µm; H, 3 mm; J, K, 250 µm.
FIG. 2 in Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, sp. nov. (Solieriaceae, Rhodophyta) a new cylindrical species from the southwestern Gulf of Mexico
FIG. 2. — Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, sp. nov: A, Holotype specimen; tetrasporic plant; B, Cystocarpic plant with numerous spines and short laterals; C, Habit of a vegetative plant; D, Vegetative plant with abundant branches and spines. Scale bars: A, 3 cm; B, 2 cm; C, D, 4 cm.
FIG. 1 in Meristotheca spinella Núñez-Resendiz, Dreckmann & Sentíes, sp. nov. (Solieriaceae, Rhodophyta) a new cylindrical species from the southwestern Gulf of Mexico
FIG. 1. — Bayesian inference topology based on rbcL sequence data. ML bootstrap (left) followed by BI values (right) on branches. Abbreviations and symbols: Asterisks indicate full support (ML = 100%, BI = 1.0%), values below 70% are not shown. Sequences generated in this study are in boldface (see Table 1). S.P.S. = substitutions per site.
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 7–10 in Meristotheca lysonensis sp. nov. (Solieriaceae, Rhodophyta), a new flattened species from Vietnamese waters
FIGURES 7–10. Vegetative structures of Meristotheca lysonensis X.-V. Nguyen, X.-T. Nguyen, Kittle et McDermid, sp. nov. (IONCS210215b). 7. Cross section through the basal part showing the layers of outer layers (white arrow), inner layer cellular cortex (black arrow) and filamentous medulla (arrowhead). 8. Cross section near the apex of a blade. 9. Longitudinal section showing secondary pitconnections (arrowheads) between adjacent medullary cells. 10. Crosswise filaments (arrowhead) transversely arranged in the medullary region.
FIGURES 11–14 in Meristotheca lysonensis sp. nov. (Solieriaceae, Rhodophyta), a new flattened species from Vietnamese waters
FIGURES 11–14. Reproductive structures of Meristotheca lysonensis X.-V. Nguyen, X.-T. Nguyen, Kittle et McDermid, sp. nov. (IONCS210215b) 11. Tetrasporangial initial laterally pit-connected (arrowhead) to its parental cell. 12. Tetrasporangium basally pit-connected (arrowhead) to the parental cells. 13. Zonately divided tetrasporangium (arrowhead) with a basal pit-connection with the parental cell. 14. Spermatangia (arrowhead) produced from the outermost cortical cells (ION-CS210301b).
FIGURES 3–6. Meristotheca lysonensis X.-V. Nguyen, X.-T in Meristotheca lysonensis sp. nov. (Solieriaceae, Rhodophyta), a new flattened species from Vietnamese waters
FIGURES 3–6. Meristotheca lysonensis X.-V. Nguyen, X.-T. Nguyen, Kittle et McDermid, sp. nov. 3: Wet habit of a vegetative thallus, holotype specimen (ION-CS210215b), tetrasporangial plant with secondary holdfasts (black arrows). 4. A mature segment of the blade, with the rough surface by the presence of warty or short spinose projections (ION-CS210215b). 5. Dried specimen, isotype, a male plant (ION-CS210301b). 6. Dried specimen, isotype (ION-01011b), tetrasporangial plant.
FIGURE 1 in Meristotheca lysonensis sp. nov. (Solieriaceae, Rhodophyta), a new flattened species from Vietnamese waters
FIGURE 1. Map of Viet Nam showing the sampling sites.
FIGURE 2 in Meristotheca lysonensis sp. nov. (Solieriaceae, Rhodophyta), a new flattened species from Vietnamese waters
FIGURE 2. Bayesian phylogeny of Solieriaceae species based on rbcL DNA sequences. Halarachnion ligulatum was used as outgroup. Bootstrap values and posterior probability of each method are shown at each node: (left) ML; (right) BI; * denotes full support (ML = 100%, BI = 1.0). - = Bootstrap values lower than 50%. I = Cylindrical species, II = Flattened species
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