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23 results for “Dictyotales”
Figure 3 in First report of the Hawaiian genus Newhousia (Dictyotales, Phaeophyceae) from Madang, Papua New Guinea and description of the new species N. yhaga sp. nov.
Figure 3: Bayesian tree, generated with MrBayes, based on the concatenation of cox3, psbA and rbcL gene sequences of Phaeophycean species including Newhousia imbricata and Newhousia yhaga sp. nov. The values shown at each node represent the maximum likelihood (left) and posterior probability (right) values. The tree is drawn to scale, with branch lengths measured in the number of substitutions per site.
Figure 2 in First report of the Hawaiian genus Newhousia (Dictyotales, Phaeophyceae) from Madang, Papua New Guinea and description of the new species N. yhaga sp. nov.
Figure 2: Newhousia yhaga sp. nov. habit and anatomical features. (A, B) Two aspects of the holotype specimen, showing its predominantly olive-green hue. A coralline red alga (Figure 2B, arrow) is epiphytic on the Newhousia crust. (C) Detail of radially growing adjacent and overlapping blades on the surface of the holotype. (D) Fracture of the Newhousia crust exposing underlying blades (arrow). (E) Detail of one of the single surface blades irregularly spreading from the central point (arrow) that initiated its growth. (F, G) Medium and high-power magnifications of banding shown by overlapping layers of blades (dark lines) and calcium carbonate (white lines) that comprise the consolidated crusts of a Newhousia thallus. Newhousia is cemented to coral substratum (Figure 2F, arrow). (H–J) Stages in radial development of surface blades from points of origin (arrows). (K) Surface view of aligned, rectilinear cells of the epithallus. (L, M) Low- and high-power details of cluster of erumpent filaments that may represent juvenile hairs. (N) Cross section of single blade showing double row of rectilinear epithallial cells overlying each cuboidal hypothallial cell. (O) Longitudinal section of single blade showing aligned epithallial row overlying a rectilinear hypothallial cell.
Figure 1 in First report of the Hawaiian genus Newhousia (Dictyotales, Phaeophyceae) from Madang, Papua New Guinea and description of the new species N. yhaga sp. nov.
Figure 1: Map showing the location of Madang, Papua New Guinea, where Newhousia yhaga C.W.Vieira, De Clerck et Payri, sp. nov. was collected.
Fig. 5 in Hidden in plain sight: Lindauera gen. nov.: a new genus of Dictyotales from New Zealand
Fig. 5. Specimens showing morphological variation present in Lindauera papenfussii. (a) WELT A026094, Doubtful Sound, Fiordland; (b) WELT A032190, Te Miko Reef, Bay of Islands.
Fig. 2 in Hidden in plain sight: Lindauera gen. nov.: a new genus of Dictyotales from New Zealand
Fig. 2. Map showing regions of New Zealand where Lindauera papenfussii has been recorded and sites of specimen records confirmed with sequence data.
Fig. 4 in Hidden in plain sight: Lindauera gen. nov.: a new genus of Dictyotales from New Zealand
Fig. 4. Maximum-likelihood phylogram estimated from concatenated psaA, psbA and rbcL sequence data. Support values are shown on each branch: approximate likelihood ratio test (aLRT,%) and ML bootstrap (%) values above, and Bayesian posterior probability (PP) values below. Only values greater than 80% (aLRT), 80% (bootstrap) and 0.9 (PP) are shown; all support values are shown if two support methods for a clade reach the cutoff value. Thick lines lead to clades receiving support of 100/100/1 (alrt/bootstrap/PP).
FIGURE 4 in Morphological and molecular characterization of Lobophora declerckii and L. variegata (Dictyotales, Ochrophyta) on the Atlantic coast of Mexico
FIGURE 4: Best tree found after maximum likelihood heuristic search. Posterior probabilities and bootstrap frequencies are indicated above branches. Only values above 0.50 or 50% are shown, * represents branches not recovered in the Bayesian majority rule consensus or in the bootstrap consensus tree.
FIGURE 1. Lobophora declerckii N. E. Schultz, C. W. Schneider & L in Morphological and molecular characterization of Lobophora declerckii and L. variegata (Dictyotales, Ochrophyta) on the Atlantic coast of Mexico
FIGURE 1. Lobophora declerckii N. E. Schultz, C. W. Schneider & L. Le Gall. A: Habit of thallus. B: Cross section of a blade. C: Surface view of a blade. D: Longitudinal section of a blade.
FIGURE 3 in Morphological and molecular characterization of Lobophora declerckii and L. variegata (Dictyotales, Ochrophyta) on the Atlantic coast of Mexico
FIGURE 3. Distribution of Lobophora from the Atlantic coast of Mexico and surrounding areas (Schultz et al. 2015; Vieira et al. 2016).
FIGURE 2 in Morphological and molecular characterization of Lobophora declerckii and L. variegata (Dictyotales, Ochrophyta) on the Atlantic coast of Mexico
FIGURE 2. Lobophora variegata (J. V. Lamouroux) Womersley ex E. C. Oliveira. A: Aspect of a herbarium specimen. B: Habit of a living plant. C: Longitudinal section of a blade. D, E: Cross section of a blade. F: View of the ventral surface of the blade.
FIGURE 2 in Diversity and phylogeny of the brown alga Lobophora (Dictyotales, Phaeophyceae) in Singapore
FIGURE 2. Phylogenetic reconstruction of Lobophora with Dictyota dichotoma and Padina arborescens as outgroups, based on maximum likelihood (ML) analysis of cox3 alignment. Numeral in parentheses represents number of individuals of the particular species recovered in a clade. Nodal support values indicated as ML/BI/MP when ML or maximum parsimony (MP) bootstrap>0.5, or when posterior probabilities for Bayesian inference (BI)>0.8, at species level and above. Sequences from Singapore are in bold. Lobophora variegata is in red.
FIGURE 4 in Diversity and phylogeny of the brown alga Lobophora (Dictyotales, Phaeophyceae) in Singapore
FIGURE 4. Morphological observations of Lobophora species found in Singapore. Lobophora challengeriae in situ (A), L. challengeriae longitudinal section (B), L. challengeriae transverse section (C). Lobophora lamourouxii in situ (D) (inset: sori), L. lamourouxii longitudinal section (E), L. lamourouxii transverse section (F). Lobophora pachyventera morphotype 1 in situ (G) (inset: morphotype 2), L. pachyventera longitudinal section (H), L. pachyventera transverse section (I). Lobophora sp61 in situ (J), Lobophora sp61 longitudinal section (K), Lobophora sp61 transverse section (L). The metallic scale is 2.5 cm in width (A, D, G, J). Scale bars represent 0.1 mm.
FIGURE 3 in Diversity and phylogeny of the brown alga Lobophora (Dictyotales, Phaeophyceae) in Singapore
FIGURE 3. Phylogenetic reconstruction of Lobophora with Dictyota dichotoma and Padina australis as outgroups, based on maximum likelihood (ML) analysis of psbA alignment. Numeral in parentheses represents number of individuals of the particular species recovered in a clade. Nodal support values indicated as ML/BI/MP when ML or maximum parsimony (MP) bootstrap>0.5, or when posterior probabilities for Bayesian inference (BI)>0.8, at species level and above. Sequences from Singapore are in bold. Lobophora challengeriae sequences from Fong et al. (2019) are prefixed with 'YZT'. Lobophora variegata is in red.
FIGURE 5. Padina pavonicoides. A in Re-examination of the distribution and species diversity of the genus Padina (Dictyotales, Phaeophyceae) in the Mediterranean Sea
FIGURE 5. Padina pavonicoides. A. Habitus of P. pavonicoides. B. Lower surface with sporangial sori in patches above hair lines, arranged at equal distance C. Section of tetrasporangial sori covered with an indusium (pointed by the arrow). D. Longitudinal section of the rolled apical portion of the thallus showing 2 layers of cells. E. Cross section of the median portion of the thallus showing 3 layers of cells. F. Cross section of the basal portion of the thallus showing 3 layers of cells. G. Cross section of Vauganiella stage. Photos A, D, and F refer to the sample of Brucoli (SR), photo G refers to the sample of Martingana—Pantelleria, and photos B, C and E refer to the sample of Scauri—Pantelleria. Scale bars: A, 1 cm; B, 0,5 cm; C–G, 50 μm. Photos by G. Marletta.
FIGURE 6. Padina tetrastromatica. A in Re-examination of the distribution and species diversity of the genus Padina (Dictyotales, Phaeophyceae) in the Mediterranean Sea
FIGURE 6. Padina tetrastromatica. A. Herbarium sheet (CAT 1730) showing habitus. B. Lower surface with continuous lines of sporangial sori above hair lines and discontinuous lines below the hair lines. C. Longitudinal section of the rolled part of the apical portion of the thallus. D. Cross section of the median portion of the thallus showing 4 layers of cells. E. Cross section of the basal portion of the thallus showing 4 layers of cells. All photos refer to the herbarium sheet sample. Scale bars: A, 1 cm; B, 110 μm C–E, 50 μm. Photos by G. Marletta.
FIGURE 3. Padina gymnospora. A in Re-examination of the distribution and species diversity of the genus Padina (Dictyotales, Phaeophyceae) in the Mediterranean Sea
FIGURE 3. Padina gymnospora. A. Herbarium sheet (CAT 1735) showing the habitus. B. Longitudinal section of the rolled part of the apical portion of the thallus shows 2 cell layers in the rolled part and the transition to 3 cells (pointed by the arrow). C. Cross section of the median portion of the thallus showing 4 layers of cells. D. Cross section of the basal portion of the thallus showing 6–8 layers of cells. All photos refer to the herbarium sheet sample. Scale bars: A, 1,5 cm; B–D, 50 μm. Photos by G. Marletta.
FIGURE 2. Padina ditristromatica. A in Re-examination of the distribution and species diversity of the genus Padina (Dictyotales, Phaeophyceae) in the Mediterranean Sea
FIGURE 2. Padina ditristromatica. A. Herbarium sheet (CAT 1110) showing the habitus. B. Upper surface with hair lines distributed in unequal distance C. Longitudinal section of the rolled part of the apical portion of the thallus showing 2 layers of cells. D. Cross section of the middle portion, showing a mixture of 2 (pointed by the arrows) to 3 layers (pointed by the arrowheads). E. Cross section of the basal portion of the thallus showing 2–3 layers of cells (pointed by the arrows). Photo A refers to the herbarium sheet sample. Photos B to E refer to the Santa Tecla (CT) sample. Scale bars: A, B, 1 cm; C–E, 50 μm. Photos by G. Marletta.
FIGURE 4. Padina pavonica. A in Re-examination of the distribution and species diversity of the genus Padina (Dictyotales, Phaeophyceae) in the Mediterranean Sea
FIGURE 4. Padina pavonica. A. Habitus of P. pavonica with the Vauganiella stage (pointed by the arrow). B. Lower surface with broad sori above the hair lines and narrow below the hair lines; in the lower part of the picture to the right is a detail of the section of tetrasporangial sori covered with an indusium. C. Longitudinal section of the rolled part of the apical portion of the thallus showing 2 layers of cells. D. Cross section of the median portion of the thallus showing 3 layers of cells. E. Cross section of the basal portion of the thallus showing 4 layers of cells. F. Cross section of the Vauganiella stage. All photos refer to the sample of Pantelleria except for the photo of the sporangial sori, which refers to the herbarium sheet (CAT1734). Scale bars: A, 1 cm; B (section of tetrasporangial sori)—F, 50 μm; B (inset), 1,5 mm. Photos by G. Marletta.
Fig. 3. Lobospira bicuspidata, PERTH 09316639 in Hidden in plain sight: Lindauera gen. nov.: a new genus of Dictyotales from New Zealand
Fig. 3. Lobospira bicuspidata, PERTH 09316639.
Fig. 1 in Hidden in plain sight: Lindauera gen. nov.: a new genus of Dictyotales from New Zealand
Fig. 1. Holotype specimen of Dictyota papenfussii Lindauer, AK295737.
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