taxonID	type	description	language	source
8DC644221D9F7331E98EB4C9958E06E1.taxon	etymology	Etymology. Atricolor (L), meaning black, dark coloured, referring to the dark pigmented hyphae.	en	Vohnik, Martin, Borovec, Ondrej, Kolarikova, Zuzana, Sudova, Radka, Reblova, Martina (2019): Extensive sampling and high-throughput sequencing reveal Posidoniomycesatricolor gen. et sp. nov. (Aigialaceae, Pleosporales) as the dominant root mycobiont of the dominant Mediterranean seagrass Posidoniaoceanica. MycoKeys 55: 59-86, DOI: http://dx.doi.org/10.3897/mycokeys.55.35682, URL: http://dx.doi.org/10.3897/mycokeys.55.35682
8DC644221D9F7331E98EB4C9958E06E1.taxon	description	Description in culture. Mycelial colonial morphotype: Colonies on PCA 6 - 8 mm in diameter in 3 mo, circular, convex, appearing woolly, margin entire, aerial mycelium abundant, densest at the centre, cobwebby towards the margin, white to grey with a pale brown zone at the margin, colony surface with a dark brown hue formed by substrate mycelium and released pigment; reverse brown. Compact colonial morphotype: Colonies on PCA 5 - 6 mm in diameter in 8 mo, irregular, pulvinate, deeply furrowed, appearing mucoid-waxy to faintly floccose, of a " cartilage " consistency, become hollow upon aging, margin lobate, aerial mycelium scant, hyaline to pale brown, colony surface dark brown; reverse dark brown. Compact colonies, which are formed in vitro on sterilised roots of P. oceanica, become irregular in shape, folded and furrowed in an almost cerebriform pattern, cacao brown, ca. 5 - 6 mm long on the longest side after several months of cultivation. Hyphae hyaline to pale brown, septate, smooth-walled and 2 - 3 (- 3.5) µm wide, often with terminal, intercalary, rarely with lateral, one-celled, thick-walled globose, subglobose to ellipsoidal swellings 10 - 14 µm wide; hyphae frequently protrude from these swellings and continue growing. Surface of the compact colonies covered by hyaline to subhyaline, smooth-walled hyphae with terminal, capitate swellings. Chlamydospores, conidiogenous cells or conidia, ascomatal initials and ascomata not observed.	en	Vohnik, Martin, Borovec, Ondrej, Kolarikova, Zuzana, Sudova, Radka, Reblova, Martina (2019): Extensive sampling and high-throughput sequencing reveal Posidoniomycesatricolor gen. et sp. nov. (Aigialaceae, Pleosporales) as the dominant root mycobiont of the dominant Mediterranean seagrass Posidoniaoceanica. MycoKeys 55: 59-86, DOI: http://dx.doi.org/10.3897/mycokeys.55.35682, URL: http://dx.doi.org/10.3897/mycokeys.55.35682
8DC644221D9F7331E98EB4C9958E06E1.taxon	description	Description in vivo. In vivo hyphae pigmented, septate, smooth-walled and (2 -) 3 - 4 (- 5) µm wide, colonising root cells of the host and / or forming an extraradical hyphal sheath, i. e. a finger-like pseudoparenchymatous net on the root surface. Microsclerotia intracellular, melanised, round or elongated and 8 - 10 (- 17) µm wide, present in the P. oceanica root hypodermis. Intracellular hyphae also infrequently occur in the rhizodermis.	en	Vohnik, Martin, Borovec, Ondrej, Kolarikova, Zuzana, Sudova, Radka, Reblova, Martina (2019): Extensive sampling and high-throughput sequencing reveal Posidoniomycesatricolor gen. et sp. nov. (Aigialaceae, Pleosporales) as the dominant root mycobiont of the dominant Mediterranean seagrass Posidoniaoceanica. MycoKeys 55: 59-86, DOI: http://dx.doi.org/10.3897/mycokeys.55.35682, URL: http://dx.doi.org/10.3897/mycokeys.55.35682
8DC644221D9F7331E98EB4C9958E06E1.taxon	materials_examined	Specimens examined. Croatia. Dubrovnik-Neretva County: Potomje, Borak (42.92236 N, 17.34685 E), isolated from surface-sterilised healthy-looking terminal roots of P. oceanica, 28 Sep 2016, M. Vohnik & O. Borovec BRK- 11 (PRA- 15296); ibid., BRK- 25 (PRA- 15298); BRK- 34 (PRA- 15297); BRK- 60 (PRA- 15300); BRK- 61 (PRA- 15293); BRK- 76 (PRA- 15302); BRK- 87 (PRA- 15299); BRK- 93 (PRA- 15301), BRK- 97 (PRA- 15303). Croatia. Split-Dalmatia County: Palagruza archipelago, Gangaro Island I (43.8639 N, 15.4341 E), isolated from a surface-sterilised healthy-looking terminal root of P. oceanica, 3 September 2012, M. Vohnik & O. Borovec M 8. France. Provence-Alpes-Cote d'Azur Region: Var Department, Saint-Raphael, Cap Roux (43.45026 N, 6.91951 E), isolated from a surface-sterilised healthy-looking terminal root of P. oceanica, 17 June 2012, M. Vohnik P 10. France. Provence-Alpes-Cote d'Azur Region: Alpes-Maritimes Department, Antibes (43.55726 N, 7.12209 E), isolated from a surface-sterilised healthy-looking terminal root of P. oceanica, 18 June 2012, M. Vohnik P 11. France. Provence-Alpes-Cote d'Azur Region: Var Department, Sanary-sur-Mer (43.12054 N, 5.77545 E), isolated from a surface-sterilised healthy-looking terminal root of P. oceanica, 19 June 2012, M. Vohnik P 15. Italy. Liguria Region: Savona Province, Gulf of Genoa, Finale Ligure (44.17337 N, 8.36765 E), isolated from a surface-sterilised healthy-looking terminal root of P. oceanica, 17 June 2012, M. Vohnik P 09. Spain. Girona Province: L'Escala (42.10744 N, 3.16892 E), isolated from a surface-sterilised healthy-looking terminal root of P. oceanica, 18 June 2012, M. Vohnik P 20.	en	Vohnik, Martin, Borovec, Ondrej, Kolarikova, Zuzana, Sudova, Radka, Reblova, Martina (2019): Extensive sampling and high-throughput sequencing reveal Posidoniomycesatricolor gen. et sp. nov. (Aigialaceae, Pleosporales) as the dominant root mycobiont of the dominant Mediterranean seagrass Posidoniaoceanica. MycoKeys 55: 59-86, DOI: http://dx.doi.org/10.3897/mycokeys.55.35682, URL: http://dx.doi.org/10.3897/mycokeys.55.35682
C65C483B2A4BBF2852BB9C38905EF67A.taxon	diagnosis	Diagnosis. In vivo, colonisation pattern of host roots resembles colonisation by the so-called dark septate endophytes (DSE) ubiquitous in the roots of most terrestrial plants. However, the dark septate hyphae and microsclerotia of Posidoniomyces never colonise vascular tissues of the host roots and are mostly confined to the hypodermis.	en	Vohnik, Martin, Borovec, Ondrej, Kolarikova, Zuzana, Sudova, Radka, Reblova, Martina (2019): Extensive sampling and high-throughput sequencing reveal Posidoniomycesatricolor gen. et sp. nov. (Aigialaceae, Pleosporales) as the dominant root mycobiont of the dominant Mediterranean seagrass Posidoniaoceanica. MycoKeys 55: 59-86, DOI: http://dx.doi.org/10.3897/mycokeys.55.35682, URL: http://dx.doi.org/10.3897/mycokeys.55.35682
C65C483B2A4BBF2852BB9C38905EF67A.taxon	etymology	Etymology. Named after the host seagrass Posidonia oceanica and myces (Greek), meaning fungus.	en	Vohnik, Martin, Borovec, Ondrej, Kolarikova, Zuzana, Sudova, Radka, Reblova, Martina (2019): Extensive sampling and high-throughput sequencing reveal Posidoniomycesatricolor gen. et sp. nov. (Aigialaceae, Pleosporales) as the dominant root mycobiont of the dominant Mediterranean seagrass Posidoniaoceanica. MycoKeys 55: 59-86, DOI: http://dx.doi.org/10.3897/mycokeys.55.35682, URL: http://dx.doi.org/10.3897/mycokeys.55.35682
C65C483B2A4BBF2852BB9C38905EF67A.taxon	description	Description. Root mycobiont of the dominant and endemic Mediterranean seagrass Posidonia oceanica. In vivo, hyphae brown, septate, forming intracellular microsclerotia in the hypodermis of the terminal fine roots and finger-like pseudoparenchymatous net on the surface of these roots, i. e. a colonisation pattern resembling the DSE association ubiquitous in the roots of terrestrial plants. In vitro, two distinct colonial morphotypes named compact and mycelial (often with aerial hyphae) are consistently formed. Colonies brown, mycelium composed of septate, hyaline, subhyaline to pigmented hyphae with intercalary, terminal, rarely lateral, one-celled globose, subglobose to ellipsoidal swellings that are prominent especially on the surface of the compact colonies. Sexual state unknown.	en	Vohnik, Martin, Borovec, Ondrej, Kolarikova, Zuzana, Sudova, Radka, Reblova, Martina (2019): Extensive sampling and high-throughput sequencing reveal Posidoniomycesatricolor gen. et sp. nov. (Aigialaceae, Pleosporales) as the dominant root mycobiont of the dominant Mediterranean seagrass Posidoniaoceanica. MycoKeys 55: 59-86, DOI: http://dx.doi.org/10.3897/mycokeys.55.35682, URL: http://dx.doi.org/10.3897/mycokeys.55.35682
