taxonID	type	description	language	source
AC2B87C0FFD17953D853DD16CF26FB2E.taxon	description	(Fig. 3)	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFD17953D853DD16CF26FB2E.taxon	materials_examined	TYPE MATERIAL. — Argentina • Chubut, Puerto Madryn; 42 ° 46 ’ 48.2 ” S, 64 ° 00 ’ 06.4 ” W; 01. XII. 2016; Ailen M. Poza; holotype: BBB AP 0093; GenBank: PZ 122728 (cox 3) • ibid.; Ailen M. Poza; isotype: BBB AP 0091; GenBank: PZ 122727 (cox 3) • ibid.; 26. VI. 2014; Juan Escobar; paratypes: BBB AP 0063, BBB AP 0064; GenBank: PZ 122730, PZ 122731 (cox 3) • ibid.; 15. IX. 2018; M. Emilia Croce; paratypes: BBB MEC 198, BBB MEC 199, BBB MEC 200; GenBank: PZ 122732, PZ 122733, PZ 122734 (cox 3).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFD17953D853DD16CF26FB2E.taxon	etymology	ETYMOLOGY. — The species epithet “ patagonica ” refers to its occurrence in the Patagonian coasts of Argentina and Chile.	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFD17953D853DD16CF26FB2E.taxon	biology_ecology	ECOLOGY. — Grows epiphytic on other seaweeds such as Corallina in shallow intertidal areas, from early winter to late spring.	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFD17953D853DD16CF26FB2E.taxon	distribution	DISTRIBUTION. — Argentina (this study), Chile (as “ C. peregrina ”, accession number: GU 252664, GenBank), United States (Boo et al. 2011), Korea (Boo et al. 2011).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFD17953D853DD16CF26FB2E.taxon	description	DESCRIPTION Thalli are saccate, deeply folded, and are inflated but easily collapsed upon water loss, reaching 6.5 cm in size (Fig. 3 A). Rhizoids arise as projections from the cortical cells. Cortical cells are polygonal in surface view, with one chloroplast and a prominent pyrenoid, 7.5 - 18.5 µm wide (Fig. 3 B). Cortex is composed of 1 - 2 layers of cuboidal to broadly obovate cells, 6 - 15 µm in size (Fig. 3 C). Medulla is composed of three-four layers of rounded to obovate medullary cells that are progressively larger but more collapsed from the cortex to the hollow center, to 267 µm at the widest (Fig. 3 C). Hairs are abundant, multicellular, arising in groups from pits, particularly from medullary cells near the surface, each hair arises separately from one medullary cell (Fig. 3 D). Plurangial sori are ecuticulate, forming very extensive and irregular patches (Fig. 3 E, F). Plurangia are uni- to biseriate, up to eight locules, to 48 µm long (Fig. 3 G, H). Paraphyses are abundant, uni- to bicellular, cylindrical to clavate, as long as or shorter than plurangia, to 42 µm long (Fig. 3 H).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7953DBBBDC56C891FACE.taxon	description	(Fig. 4)	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7953DBBBDC56C891FACE.taxon	materials_examined	SPECIMEN EXAMINED. — Argentina • Chubut, Puerto Madryn; 42 ° 46 ’ 48.2 ” S, 64 ° 00 ’ 06.4 ” W; 01. XII. 2016; Ailen M. Poza (BBB AP 0094); GenBank: PZ 122729 (cox 3). TYPE LOCALITY. — South Korea, Sangjokam, Goseong (Boo et al. 2011).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7953DBBBDC56C891FACE.taxon	distribution	DISTRIBUTION. — Argentina (this study), Australia, French Polynesia, Hong Kong, Japan, Korea, New Zealand, South Africa, United States (Boo et al. 2011; Guiry & Guiry 2025).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7953DBBBDC56C891FACE.taxon	description	DESCRIPTION Thallus is saccate, somewhat sinuous, with a slightly firm consistency, and 4 cm in size (Fig. 4 A). Rhizoids present; they originate as projections from the cortical cells. Cortical cells are polygonal in surface view with one parietal chloroplast and one large pyrenoid, 9 - 16 µm in size (Fig. 4 B). Cortex is composed of 1 - 2 layers cuboidal to widely obovate pigmented cells, 9 - 17 µm in size (Fig. 4 C). Medulla is composed of four layers of clear, rounded cells that are progressively larger from the cortex to the inner part; medullary cell sizes range from 21 to 122 µm (Fig. 4 C). Hairs are abundant, multicellular, arising in groups from shallow pits near the cortex (Fig. 4 D), when they appear deeper, the cortex is invaginated. Plurangial sori are ecuticulate, forming irregular patches (Fig. 4 E, F). Plurangia are robust, biseriate, up to 10 locules, to 57 µm long (Fig. 4 G, H). Paraphyses are abundant, composed of one to three cells, they are clavate when young but cylindrical and slender when mature, usually larger than plurangia, to 74 µm long (Fig. 4 G, H).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7950D8D0DC36CFA1F96C.taxon	description	(Fig. 5)	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7950D8D0DC36CFA1F96C.taxon	materials_examined	SPECIMENS EXAMINED. — Argentina • Chubut, Puerto Madryn; 42 ° 46 ’ 48.2 ” S, 64 ° 00 ’ 06.4 ” W; 01. XII. 2016; Ailen M. Poza (BBB AP 0092); GenBank: PZ 122735 (cox 3) • ibid.; 09. XX. 2017; Ailen M. Poza (BBB AP 0113, BBB AP 0114, BBB AP 0115, BBB AP 0116, BBB AP 0117, BBB AP 0118, BBB AP 0119); GenBank: PZ 122736, PZ 122737, PZ 122738, PZ 122739, PZ 122740, PZ 122741, PZ 122742 (cox 3). TYPE LOCALITY. — France, Vannes River, Morbihan (Vandermeulen 1984).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7950D8D0DC36CFA1F96C.taxon	distribution	DISTRIBUTION. — Argentina (this study); Algeria, Australia, Azores, Baltic Sea, Britain, Bulgaria, Canada, Canary Islands, Channel Islands, Denmark, France, Greece, Hawaiian Islands, Ireland, Isla de Alborán, Italy, Japan, Korea, Lebanon, Liberia, Madeira, Mexico, Morocco, Netherlands, New Zealand, Norway, Pakistan, Portugal, Russia, Salvage Islands, Sardinia, Scandinavia, Solomon Islands, Spain, Spanish North Africa, Tanzania, United States (Guiry & Guiry 2025).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
AC2B87C0FFDF7950D8D0DC36CFA1F96C.taxon	description	DESCRIPTION Thalli are globose, inflated, sinuous, and with firm consistency, reaching 6 cm in size (Fig. 5 A). Cortical cells are polygonal in surface view, with one parietal chloroplast and one large pyrenoid, 6 - 20.5 µm wide (Fig. 5 B). Attachment system is well developed and extended; the long multicellular rhizoids arise as projections from the outer cortical cells (Fig. 5 C). Cortex is composed of one-two layers of small, cuboidal to broadly obovate pigmented cells, 6.5 - 16 µm wide (Fig. 5 C). The medulla is composed of 6 (– 7) layers of clear, rounded cells that are progressively larger from the cortex to the inner portions, to 452.5 µm at the widest (Fig. 5 C). Hairs are abundant, multicellular, arising in groups from inner or external medullary cells; more than one hair may arise from a medullary cell (Fig. 5 D, E). Plurangial sori are ecuticulate, forming very extensive and irregular patches on the thallus (Fig. 5 F). Plurangia are uni- to biseriate, composed of six locules, to 52 µm long (Fig. 5 G). Paraphyses are abundant, formed by one or two cells, they are clavate to cylindrical, similar in size or larger than plurangia, to 53 µm long (Fig. 5 G).	en	Santiañez, Maria Emilia Croce John Michael L. Lastimoso Ailen Melisa Poza Kazuhiro Kogame Wilfred John E. (2026): Reassessment of the diversity of the brown algal genus Colpomenia (Endlicher) Derbès & Solier (Scytosiphonaceae, Ectocarpales) in Argentina based on mitochondrial cox 3 gene, including the description of Colpomenia patagonica sp. nov. Cryptogamie, Algologie 47 (4): 47-66, DOI: 10.5252/cryptogamie-algologie2026v47a4, URL: https://doi.org/10.5252/cryptogamie-algologie2026v47a4
