taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
C33B5556FF85FFFB3CF263E9FC7CFEA6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/13646224/files/figure.png	https://doi.org/10.5281/zenodo.13646224	FIGURE 1. A–H. Kyrtuthrix huatulcensis field material.A. Lateral section of thallus showing parallel arrangement of filaments. B, D–F Loops formed at the base of the thallus. C, E. Filaments tapering towards the upper surface of the thallus. G. Young filaments with loops at the base and tapering apices. H. Cross section of thallus parallel to the surface plane showing paired cells of bent trichomes surrounded by individual and paired sheaths. Scale bar A=20 μm, B–H 10 μm.	FIGURE 1. A–H. Kyrtuthrix huatulcensis field material.A. Lateral section of thallus showing parallel arrangement of filaments. B, D–F Loops formed at the base of the thallus. C, E. Filaments tapering towards the upper surface of the thallus. G. Young filaments with loops at the base and tapering apices. H. Cross section of thallus parallel to the surface plane showing paired cells of bent trichomes surrounded by individual and paired sheaths. Scale bar A=20 μm, B–H 10 μm.	2016-10-05	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa		Zenodo	biologists	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa			
C33B5556FF85FFFB3CF263E9FC7CFEA6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/13646228/files/figure.png	https://doi.org/10.5281/zenodo.13646228	FIGURE 2. A–H. Drawings of Kyrtuthrix huatulcensis field material.A. Different stages of young already bent filaments in lateral view. B. Young bent attenuated filament. C–G. Varied examples of the diversity of heterocyte and cell shape, size and disposition. D, F, G. Filaments with loop at the base, tapering upwards. C, E. Filaments tapering towards the upper surface of the thallus. H. Cross section of thallus showing paired cells of bent trichomes surrounded by individual and paired sheaths. A. Scale bar A=20 μm, B–H 10 μm.	FIGURE 2. A–H. Drawings of Kyrtuthrix huatulcensis field material.A. Different stages of young already bent filaments in lateral view. B. Young bent attenuated filament. C–G. Varied examples of the diversity of heterocyte and cell shape, size and disposition. D, F, G. Filaments with loop at the base, tapering upwards. C, E. Filaments tapering towards the upper surface of the thallus. H. Cross section of thallus showing paired cells of bent trichomes surrounded by individual and paired sheaths. A. Scale bar A=20 μm, B–H 10 μm.	2016-10-05	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa		Zenodo	biologists	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa			
C33B5556FF85FFFB3CF263E9FC7CFEA6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/13646231/files/figure.png	https://doi.org/10.5281/zenodo.13646231	FIGURE 3. A–L. Kyrtuthrix huatulcensis A–J culture material. K, L field material. A–C, H. Lateral view of growth form in culture showing both individual and paired sheaths as well as tortuous filaments with loops, surrounded by common mucilaginous matrix. D, E. Two to few celled isopolar hormogonia in culture. F, G, I. Short heteropolar hormogonia. K. Young filament already bent. L. Isopolar hormogonia from field material. Scale bar A=20 μm, B–H 10 μm.	FIGURE 3. A–L. Kyrtuthrix huatulcensis A–J culture material. K, L field material. A–C, H. Lateral view of growth form in culture showing both individual and paired sheaths as well as tortuous filaments with loops, surrounded by common mucilaginous matrix. D, E. Two to few celled isopolar hormogonia in culture. F, G, I. Short heteropolar hormogonia. K. Young filament already bent. L. Isopolar hormogonia from field material. Scale bar A=20 μm, B–H 10 μm.	2016-10-05	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa		Zenodo	biologists	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa			
C33B5556FF85FFFB3CF263E9FC7CFEA6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/13646233/files/figure.png	https://doi.org/10.5281/zenodo.13646233	FIGURE 4. Phylogenetic analysis based on 16S rRNA sequences of 181 OTUs showing position of Kyrtuthrix huatulcensis. The tree is based on Maximun parsimony (MP) and the support values are MP/ML/ BI posterior probabilities. The cut-off values for bootstrap and probability are 50 and 0.5, respectively, * 100/1; - lower 50 or 0.5. Clades represent different taxonomic groups at family level. Clade Rivulariaceae divided by their environment; A: Soil, Freshwater and marine (brackish), B and C: Marine. Arrows mark both Scytonemataceae, the most recently designated family of Kyrtuthrix (Komárek et al. 2014) and its present position within the Rivulariaceae clade according to our analysis.	FIGURE 4. Phylogenetic analysis based on 16S rRNA sequences of 181 OTUs showing position of Kyrtuthrix huatulcensis. The tree is based on Maximun parsimony (MP) and the support values are MP/ML/ BI posterior probabilities. The cut-off values for bootstrap and probability are 50 and 0.5, respectively, * 100/1; - lower 50 or 0.5. Clades represent different taxonomic groups at family level. Clade Rivulariaceae divided by their environment; A: Soil, Freshwater and marine (brackish), B and C: Marine. Arrows mark both Scytonemataceae, the most recently designated family of Kyrtuthrix (Komárek et al. 2014) and its present position within the Rivulariaceae clade according to our analysis.	2016-10-05	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa		Zenodo	biologists	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa			
C33B5556FF85FFFB3CF263E9FC7CFEA6.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/13646235/files/figure.png	https://doi.org/10.5281/zenodo.13646235	FIGURE 5. Secondary structures for the D1–D1’, Box-B, V2 and V3 helices in the conserved regions of the 16S–23S ITS region:A, F, K, P: Kyrtuthrix huatulcensis; B, G, L, Q: Marine Rivulariaceae I (with variability in two operons shown); C, H, M, R: Marine Rivulariaceae II; D, I, N, S: Marine Rivulariaceae III; E, J, O, T: Microchaete grisea CCAP1445.	FIGURE 5. Secondary structures for the D1–D1’, Box-B, V2 and V3 helices in the conserved regions of the 16S–23S ITS region:A, F, K, P: Kyrtuthrix huatulcensis; B, G, L, Q: Marine Rivulariaceae I (with variability in two operons shown); C, H, M, R: Marine Rivulariaceae II; D, I, N, S: Marine Rivulariaceae III; E, J, O, T: Microchaete grisea CCAP1445.	2016-10-05	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa		Zenodo	biologists	León-Tejera, Hilda;González-Resendiz, Laura;Johansen, Jeffrey R.;Segal-Kischinevzky, Claudia;Escobar-Sánchez, Viviana;Alba-Lois, Luisa			
