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FIGURE 8. V2 in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 8. V2 helices of species described in Oculatellaceae. Several species do not have this structure, including Pegethrix convoluta, P. indistincta, Antartic Pegethrix species, Cartusia fontana¸ Kaiparowitsia implicata.

FIGURE 18. Timaviella radians. A–B in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 18. Timaviella radians. A–B. Rapid cell division at apical region commonly observed, forming a "basal" part to filament. C. Radial formation of colonies based on trichomes radiating from an attachment point. D. False-branches in singles or in pairs, consecutive, sometimes geminate branching, E. Compact rope-like coils. F. Rapid cell division causing twists and turn of trichome within sheath. Mature filaments isodiametric, trichomes constricted at distinct cross-walls, with one large central granule dominates cytoplasm. Scale bar 10μm in 400X (C) and 1000X magnification (A–B, D–F).

FIGURE 6. D1-D1 in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 6. D1-D1' stems of species described in Oculatellaceae. The stem structures of genera described previously in other publications (Oculatella, Thermoleptolyngbya, Timaviella) or in publications under provision (Trichotorquatus) are not shown here.

FIGURE 2. 16S in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 2. 16S rRNA Bayesian Inference analysis of the filamentous group of Synechococcales cyanobacteria, showing Oculatellaceae. Black polygons represent genera that have been validly described or are named in provision (e.g., "Trichotorquatus"), with length corresponding to the distance from the most basal OTU to the most diverged OTU of the genus. Posterior probabilities for the BI analysis are given above the nodes. Taxa which we consider to be incorrectly named in NCBI or requiring revisionary work are in quotation marks.

FIGURE 17. Timaviella obliquedivisa. A–B. Slightly tapering filaments. C–E in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 17. Timaviella obliquedivisa. A–B. Slightly tapering filaments. C–E. Consecutive double and single false-branches in filaments resulting in branch-like structures. F–G. Cell division in oblique angles, causing geminate, knot-like branching or resembling to truebranching. H. Compact coiling of trichomes within sheath. Scale bar 10μm in 1000X magnification.

FIGURE 22. Komarkovaea angustata. A–B in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 22. Komarkovaea angustata. A–B. Variation in trichome width between mature and young filament or hormogonia. C. Variation in cell shapes between young and mature trichomes: isodiametric, slightly longer than width or barrel-shaped, and abundance of necridia in mature trichomes. D. Rapid regional cell division along trichomes resulting in basal and apical parts of filaments. E. Reddish small granules occassionaly observed on cells. Scale bar 10μm in 1000X magnification.

FIGURE 21. Tildeniella nuda. A in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 21. Tildeniella nuda. A. Filaments short, Pseudanabaena-like, trichomes not or only slight constricted, connected by somewhat translucent cell wall; B–H. Cells sometimes distinctively elongated, bent or involuted (arrows). Scale bar 10μm in 1000X magnification.

FIGURE 11. Pegethrix olivacea. A–D in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 11. Pegethrix olivacea. A–D. Irregular filament shapes due to uneven cell division events along trichome. E. Single falsebranching filament. F. Nodule formation. G–K. Irregular cell shape and trichome length, hormogonia few-celled, abundant. Scale bar 10μm in 1000X magnification.

FIGURE 20. Tildeniella torsiva. A in Revision of the Synechococcales (Cyanobacteria) through recognition of four families including Oculatellaceae fam. nov. and Trichocoleaceae fam. nov. and six new genera containing 14 species

FIGURE 20. Tildeniella torsiva. A. Single false-branching very rarely observed, only in senescing culture. B. Cells isodiametric to slightly longer than width. C–D. Filaments sometimes wavy to strongly spirally coiled. Scale bar 10μm in 1000X magnification.

FIGURE 5. Estimated 16S-23S ITS secondary structures D1-D1 in Revealing hidden diversity among tropical cyanobacteria the new genus Onodrimia (Synechococcales, Cyanobacteria) described using the polyphasic approach

FIGURE 5. Estimated 16S-23S ITS secondary structures D1-D1´and Box-B helices of (A, J) Onodrimia javanensis E27, E28, E30, (B, K) Leptolyngbya appalachiana GSM-SFF-MF60 (EF429286), (C, L) Phormidesmis sp. WJT36-NPBG20 (KJ939034), (D, M) Phormidesmis sp. WJT67-NPBG4A (KJ939043), (E, N) Stenomitos rutilans HA7619-LM2 (KF417430), (F, O) Neosynechococcus sphagnicola sy1 (KJ469130), (G, P) Nodosilinea nodulosa UTEX 2910 (KF307598), (H, Q) Oculatella subterranea, (I, R) Leptolyngbya boryana UTEX B 485 (EF429291).

FIGURE 3 in Revealing hidden diversity among tropical cyanobacteria the new genus Onodrimia (Synechococcales, Cyanobacteria) described using the polyphasic approach

FIGURE 3. Iconotype of Onodrimia javanensis. A–F filaments with close sheath. G–K filaments with open sheath. In the lower part are drawn hormogonia, hormocytes and tree-like tufted hormogonial production (asterisk).

FIGURE 2 in Revealing hidden diversity among tropical cyanobacteria the new genus Onodrimia (Synechococcales, Cyanobacteria) described using the polyphasic approach

FIGURE 2. Variability in reproduction of Onodrimia javanensis sp. nov. Arrow=pseudobranching, asterisk=attachment of sheath to trichome, cross=clusters of hormogonia and hormocytes, double cross=growing trichomes from hormogonia and hormocytes, circle=pale apical cell with orange granules (probably dying cell), plus=trichome protruding from sheath, double plus=empty sheaths suggesting branching of trichomes. Scale bar 10 μm.

FIGURE 1 in Revealing hidden diversity among tropical cyanobacteria the new genus Onodrimia (Synechococcales, Cyanobacteria) described using the polyphasic approach

FIGURE 1. Morphological variability of Onodrimia javanensis sp. nov. (A–B) arrangement of trichomes in colony and old sheaths. (D, F, J) trichomes with necridic cells (narrow arrow). (C, E, H) trichomes with exceeding sheath (bold arrow). (I, G) appearance of apical cells. (B, J) formation of hormogonia (asterisk). Scale bar 10 μm.

FIGURE 4. A in Revealing hidden diversity among tropical cyanobacteria the new genus Onodrimia (Synechococcales, Cyanobacteria) described using the polyphasic approach

FIGURE 4. A phylogenetic reconstruction of 146 taxa based on 16S rRNA using Bayesian inference. Studied strains Onodrimia javanensis and Leptolyngbya sensu stricto are in bold. Supports at the nodes (Bayesian inference/maximum likelihood/maximum parsimony) represent only posterior probabilities>90 and bootstrap values>50, symbol of asterisk on the nodes represent 100 posterior probabilities and bootstrap values. Lines on site of the tree represent separate lineages of Leptonygbya sensu stricto and other Leptolyngbyaceae genera including Onodrimia.

FIGURE 5 in Marileptolyngbya sina gen. nov., sp. nov. and Salileptolyngbya diazotrophicum gen. nov., sp. nov. (Synechococcales, Cyanobacteria), species of cyanobacteria isolated from a marine ecosystem

FIGURE 5. Neighbor–joining tree based on nifH gene sequences of Marileptolyngbya sina SCSIO T-2 and Salileptolyngbya diazotrophicum SCSIO 43686. Synechocystis sp. WH8501 was used as an outgroup. The studied cyanobacterial strains were in bold font. A bootstrap test involving 1000 resamplings was performed. Bar, 0.05 substitution rate (K ) units.

FIGURE 4 in Marileptolyngbya sina gen. nov., sp. nov. and Salileptolyngbya diazotrophicum gen. nov., sp. nov. (Synechococcales, Cyanobacteria), species of cyanobacteria isolated from a marine ecosystem

FIGURE 4. Phylogenetic tree based on 16S rRNA gene sequences using the Bayesian algorism, showing the positions of strains Marileptolyngbya sina SCSIO T-2 and Salileptolyngbya diazotrophicum SCSIO 43686. Gloeobacter violaceus strain PCC 7421 was used as an outgroup. The studied starins were labelled in bold. Only posterior probabilities ≥ 0.50 were indicated. Bar, 0.03 substitution rate (Knuc) units.

FIGURE 2 in Marileptolyngbya sina gen. nov., sp. nov. and Salileptolyngbya diazotrophicum gen. nov., sp. nov. (Synechococcales, Cyanobacteria), species of cyanobacteria isolated from a marine ecosystem

FIGURE 2. Scanning electron micrographs of Marileptolyngbya sina SCSIO T-2 and Salileptolyngbya diazotrophicum SCSIO 43686. a–e: SCSIO T-2; f–i: SCSIO 43686. Scale bars: a, g=10 μm; b–f, i= 5μm; h=1μm.

FIGURE 1 in Marileptolyngbya sina gen. nov., sp. nov. and Salileptolyngbya diazotrophicum gen. nov., sp. nov. (Synechococcales, Cyanobacteria), species of cyanobacteria isolated from a marine ecosystem

FIGURE 1. Light micrographs of Marileptolyngbya sina SCSIO T-2 and Salileptolyngbya diazotrophicum SCSIO 43686 (100X). a–c: SCSIO T-2; d–f: SCSIO 43686. a. unbranched and breakage of filaments. b. rounded terminal cell, sometimes extended. c. entangled filements. d. wavy filaments. e. firm sheath contained uniseriate and unbranched trichome. f. filaments reproducing by hormogonia. Scale bars= 10 μm.

FIGURE 3 in Marileptolyngbya sina gen. nov., sp. nov. and Salileptolyngbya diazotrophicum gen. nov., sp. nov. (Synechococcales, Cyanobacteria), species of cyanobacteria isolated from a marine ecosystem

FIGURE 3. Transmission electron micrographs of Marileptolyngbya sina SCSIO T-2 and Salileptolyngbya diazotrophicum SCSIO 43686. a–b. Cross section view of SCSIO T-2. c–d. Longitudinal section view of SCSIO T-2. e–g. Cross section view of SCSIO 43686. h–i. Longitudinal section view of SCSIO 43686. Scale bars: a–b, e–f, h–i= 200μm; c–d= 500 μm; f= 100μm.

FIGURE 6 in Marileptolyngbya sina gen. nov., sp. nov. and Salileptolyngbya diazotrophicum gen. nov., sp. nov. (Synechococcales, Cyanobacteria), species of cyanobacteria isolated from a marine ecosystem

FIGURE 6. Transcript secondary structure of 16S–23S ITS region of Marileptolyngbya sina SCSIO T-2, Salileptolyngbya diazotrophicum SCSIO 43686 and representative sister taxa. (a–e) D1–D1' helix. (f–j) Box B helix. (k–o) V3 helix. a, e, f= SCSIO T-2; b, f, j= SCSIO 43686; c, g, k= Nodosilinea nodulosa UTEX 2910; d, h, l= Leptolyngbya boryana PCC 6306; e, j, o= Haloleptolyngbya alcalis KR2005/106.