taxonID	type	description	language	source
9A5533D8437B5E06A0A225E868E4F586.taxon	description	Fig. 2	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
9A5533D8437B5E06A0A225E868E4F586.taxon	description	Description. Colonies on PCA velvety to cottony colonies, mostly mycelial, subhyaline, loosely wooly, reaching 75 mm in diameter after 7 days; meager sporulation or lacking until hyphae are disturbed or scarified. Conidiophores emerging from the surface of agar or aerial vegetative hyphae scattered or clustered on cut agar in light-exposed areas. Primary conidiophores mostly simple, rarely branched, 25 – 75 × 5 – 6 µm, geniculate with 2 – 3 (– 4) conidiogenous loci. Secondary conidiophores, short, 3 – 7 × 3 µm, 1 – 2 - celled, formed apically or sometimes laterally from primary conidia, mainly with one conidiogenous locus. Further geniculate extensions and conidium production yield several clusters of sporulation at the colony center. Sporulation pattern in single clumps of a few short branching chains consisting of 5 – 7 conidia. A high percentage of conidia solitary at any age of growth. Conidia ellipsoid to ovoid, with a rounded base and tapered apex; multiple transverse and longitudinal septa, conspicuously constricted near 2 or 3 transverse septa, in short chains. Mature conidia with 2 – 3 transverse septa and 0 – 3 longitudinal septa located mainly at the center of the colony, 20 – 24 × 8 – 15 µm; slightly older conidia, 25 – 34 (– 48) × 11 – 16 (– 22) µm with 3 – 4 (– 5) transverse septa and 1 – 3 oblique or longitudinal septa. Conidial body color brown with relatively dark and thick transverse septa (Fig. 2 A, B); the outer wall smooth or punctate. Formation of protoascomata and chlamydospores in the surface of vegetative mycelium conspicuous after 2 – 3 weeks of incubation. Chlamydospores hyaline, spherical or ovoid, terminal, sub-terminal or intercalary, measuring 13.5 – 22.5 × 10 – 15 µm, mostly single-celled (Fig. 2 C). Protoascomata subspherical to ovoid, light brown with numerous outgrowths of hyphae, measuring 40 – 58 µm in diameter (Fig. 2 D). Culture characteristics at 25 ° C in 7 d — Colonies on PDA cottony, grayish yellow to yellowish grey (3 C 3 / 3 D 2) with white regular margins, attaining 60.5 ± 1.1 mm diam. (Fig. 2 E); reverse olive brown to yellowish brown (4 F 6 / 5 F 5). On PCA, velvety to glabrous, olive brown (4 E 5), 67.4 ± 0.4 mm diam. (Fig. 2 F); reverse olive brown (4 E 4). On MEA, cottony, dull green (28 D 3) with a greenish-grey surface (28 C 2) and white regular margins, 51.9 ± 0.7 mm diam. (Fig. 2 G), reverse yellowish brown to brownish orange (5 F 5 / 5 C 4). On OA, velvety with a cottony center, yellowish brown to dark blond (5 E 4 / 5 D 4), 60.6 ± 1.5 mm diam. (Fig. 2 H); reverse brownish grey to yellowish brown (5 F 2 / 5 E 4). Sporulation of NB 968 isolate occurred mainly in PCA and PDA after 7 days of incubation. It was poor on MEA and OA.	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
144B262AC77D5A58B6EF83D161DD6E43.taxon	description	Fig. 3	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
144B262AC77D5A58B6EF83D161DD6E43.taxon	description	Description. Colonies on PCA velvety, approximately 70 mm in diameter, with three discrete concentric rings of growth after 7 days. Aerial axes abundant and reaching a size length of 113 – 387 µm, with 5 to 10 lateral conidiogenous branches and tips in light-exposed zones of young parts of the colony (Fig. 3 A). These branches most frequently on the upper portions of aerial conidiogenous elements, forming an arachnoid layer of branching hyphae. Primary conidiophores formed outside the center of the colony, simple, rarely branched, produced at the substrate surface, conspicuous, straight, or geniculate, up to 30 – 110 (– 352) × 3.8 – 5 µm, often developing through geniculate extensions. Each conidiophore bearing 1 – 3 conidia, sometimes with additional short chains of 2 – 3 conidia through secondary conidiophores formed mainly from distal terminal conidial cells (Fig. 3 B). Secondary conidiophores short, 20 – 52 (– 105) × 3 – 5 µm, with one or two conidiogenous sites. A high percentage of conidia of any age remaining solitary. The sporulation patterns in small clumps on elongate-branched sporulating hyphae forming a brown layer at the center of the colony. Conidia medium brown to brown, short ellipsoid, ovoid, muriform, mainly beakless or with a rounded apex (Fig. 3 B). Dominant size range: 22 – 37 (– 40) µm long × 13 – 20 μm width with 2 – 4 (– 5) transverse septa and 0 – 2 (– 3) longitudinal septa in each of the transverse segments. In the center of the colony, a high percentage of dark pigmented conidia mature of smaller size, 17.5 – 25 × 12 – 17.5 µm, initiating chain development. All maturing conidia distinctly constricted at their transverse septa, developing thick and dark-brown pigmented outer walls and sometimes with a punctate surface. Culture characteristics at 25 ° C in 7 d — Colonies on PDA cottony compact, greyish green (30 E 5 / 30 E 7) with irregular margins, attaining 67.5 ± 0.6 mm diam. (Fig. 3 C); reverse olive (3 E 4). On PCA, velvety, olive brown (4 E 4), 69.4 ± 0.5 mm diam. (Fig. 3 D); reverse grayish same color. On MEA, cottony, olive (1 E 3) with a grayish surface, irregular margins, 65.1 ± 0.6 mm diam. (Fig. 3 E); reverse olive brown (4 D 3). On OA, cottony, grey to dull green (29 D 4) with a grayish surface, 63.8 ± 1.0 mm diam. (Fig. 3 F); reverse olive brown (4 E 3). Sporulation of studied isolates occurs in all tested media after 7 days of incubation. It was abundant on PCA and PDA but moderate on MEA and OA.	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
998E4A471F52531FB338FC9483BA250C.taxon	description	Fig. 5	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
998E4A471F52531FB338FC9483BA250C.taxon	etymology	Etymology. Name refers to conidial shape and size, which is longer than other species within the section Embellisioides.	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
998E4A471F52531FB338FC9483BA250C.taxon	description	Description. On PCA, attaining 69 mm diam., colony wooly, loose, with aerial branched subhyaline hyphae and 2 – 3 pairs of moderately defined concentric rings of growth and sporulation. During an initial 5 – 7 d of growth, colony producing only minor sporulation near the agar surface. At the same time, abundant, long, suberected aerial hyphae arising throughout light-deprived parts of the colony. The tip and some branches of these slender aerial axes enlarging into well-defined conidiophores with few lateral branches, mostly near the hyphal apex, from a simple and short conidiophore bear 2 – 4 conidia (Fig. 5 A, B), yielding to an open layer of sporulation in the surface of the colony. Sporulation pattern forming compact, small clumps of conidia. Conidiophores septate, simple or sparingly branched, straight to slightly curved, pale to medium brown, with series of 2 – 6 (– 14), geniculate, sympodial conidiogenous sites. Primary conidiophores of short length, 15 – 20 × 4 – 7 µm, cylindrical, 0 – 3 - septate, produced from fertile hyphae, commonly becoming 35 – 80 (– 170) µm long with 4 – 9 transverse septa. Each conidiophore bearing a single conidium, rarely a chain of 2 conidia in undisturbed young colonies. Conidiogenous cells terminal or intercalary, solitary or proliferating sympodially (Fig. 5 B). Seldom production of secondary conidiophores from primary conidia forming short 5 – 23 (– 41) × 3.5 – 7.5 µm, 0 – 3 - septate, cylindrical or angular complexity structure at the apex leading to false conidia chains upon the aging parts of the colony. Mature conidia with 4 – 7 transverse septa, 31 – 60 × 10 – 18 µm, oblong, ellipsoid, or subcylindrical, broadly rounded at the base with a bluntly rounded apical cell (Fig. 5 C, D). Conidia at full development tapering gradually from narrowly ovoid into narrowly cylindrical, 56 – 90 (– 100) × 12.5 – 17 µm, always rounded at base tapering towards apex with 8 – 11 (– 15) transverse septa (Fig. 5 E). A few submedian cells increasing in width and producing thin longitudinal and oblique septa. Abundant juvenile conidia, 5 – 20 × 2.5 – 12.5 µm, spherical to ovoid at the center of the colony at 14 d, formed through extension of secondary conidiophores and usually 1 – 2 - celled. Fully developed conidia mostly equilateral until enlargement of a few body cells and their secondary internal septation cells introducing minor degree of curvature. Conidia slightly, to distinctly constricting at their 1 – 3 transverse septa, contrastingly darker than others. One to two longitudinal septa very pale inserted in 1 – 3 first transverse segments. Conidia color pale to medium yellow, appearing quite smooth, thin-walled due to a lack of ornamentation on the surface. Conidium germination after 24 h usually bipolar but not conspicuous from a non-polar cell. Conidiophores emerging from the surface of dead infected plants brown, scattered, with 1 – 3 (– 6) conidiogenous loci, 25 – 67 (– 100) µm long and 3.8 – 6 (– 7.5) μm thick (Fig. 5 F). Most conidia with 8 – 10 (– 11) transverse septa, 44 – 55 (– 59) × 8 – 10 µm. Culture characteristics after 7 days — Colonies color and aspect the holotype strain on PDA (Fig. 5 G), PCA (Fig. 5 H), MEA (Fig. 5 I), and OA (Fig. 5 J) are provided in Table 2. This strain grows over a wide range of temperatures with varying growth rates. Among the different temperature and culture media, the best mycelial growth occurs between 20 – 25 ° C on PDA. On all media, the strain grows slowly below 4 ° C, moderately at 16 ° C and 30 ° C, rapidly between 20 – 25 ° C, and does not grow well at a temperature of 35 ° C. Mycelial growth was inhibited at 40 ° C.	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
A6F8A7F580315CBE9FA5C0503522037D.taxon	description	Fig. 4	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
A6F8A7F580315CBE9FA5C0503522037D.taxon	etymology	Etymology. Name refers to the organ from which the species was isolated, carrot roots.	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
A6F8A7F580315CBE9FA5C0503522037D.taxon	description	Description. On PCA, attaining 75 mm in diameter, velvety (NB 830, NB 936) to flat (NB 794), sometimes with granular appearance by the presence of abundant intra-hyphal, dematiaceous, thick-walled chlamydospores after 8 – 14 days. Aerial mycelium sparse and submerged hyphae abundant, producing chlamydospores in culture formed from fertile hyphae with 3 – 5 transverse septa and sometimes one longitudinal. These fructifying elements arising from a distinct radial system of hyphae or near the substrate surface. Conidiophores arising directly from lateral and apical aerial axes, simple, septate, 20 – 30 × 3.5 – 5 μm, straight or geniculate at successive sites of conidium production, size of cells decreasing towards apex, rarely branched, cell walls thicker than those of vegetative hyphae, pale brown to brown in color, sometimes swollen at the base, rarely from chlamydospores. Conidiogenous branches, formed on fertile hyphae, 1 – 2 - celled, 15 – 20 × 3 µm; the longest conidiophores reaching 31 – 88 μm in length. Each usually bearing only a single conidium in young cultures and occasionally a short geniculate extension with a second or third conidium. Conidiogenous sites terminal or intercalary, proliferating sympodially, brown. Occasional chain formation of two spores through secondary conidiophores on the tip or basal cells of primary conidia. Conidia mature in broad-cylindrical morphologies, usually narrow ellipsoid, ovoid, or cylindrical with rounded base and apex, as large as 18 – 26 × 7 – 10 µm, with 3 (– 4) thickened transverse septa and rarely one longitudinal septum, representing a high percentage of the mature population (Fig. 4 A, B). Conidia occasionally forming chlamydospores during germination, exhibiting single-celled, spherical or oval brown structures on both ends of conidia, measuring 7 – 12 µm in diameter (Fig. 4 C). Another population of conidia with 4 – 5 (– 6) transverse septa, smooth-walled, cylindrical to obclavate, mostly straight, sometimes curved with middle cells slightly enlarged, pale brown to brown, with rounded basal and apical cells, 30 – 36 (– 38) × 7 – 10 (– 12) and 0 – 1 (– 2) longitudinal septa in 2 – 3 of the transverse segments. A few conidia with 7 transverse septa, usually without longitudinal septa, 35 – 39 × 10 – 11 µm, relatively narrowed cylindrical, not forming secondary conidiophores (Fig. 4 D, E). Conidiophores emerging from the surface of dead infected plants rigid, brown, clustered, or scattered, with 1 – 4 (– 6) conidiogenous loci, 25 – 67 µm long and 3.8 – 6 (– 7.5) μm thick (Fig. 4 F). Most conidia with 8 – 10 (– 11) transverse septa, 44 – 55 (– 59) × 8 – 10 µm. On aged parts of the colony, conidia usually clustered in small clumps with 2 – 4 spores near the tips or laterals of primary conidiophores (Fig. 4 G). All isolates producing dark-brown, compound chlamydospores, looking like thickened oval or rounded cell chains with punctate ornamentation, arranged in chains (Fig. 4 H). Such cells conglomerating and elongating to a pearl necklace or an irregular shape, as large as 15 – 41 × 20 – 53 µm with 3 – 8 cells; these structures enlarging as the colony ages and observed also on six-week inoculated leaf debris in contact with soil. Conidia color before full maturity dark yellow, which deepens to an olive brown, paler towards apex, against which the thickness of major transverse septa contrasts strongly. Culture characteristics after 7 days — Colonies color and aspect of the holotype strain on PDA (Fig. 4 I), PCA (Fig. 4 J), MEA (Fig. 4 K), and OA (Fig. 4 L) are provided in Table 2. This strain grows over a wide range of temperatures with varying growth rates. Among the different temperature and culture media, the best mycelial growth occurs at 25 ° C on PDA and PCA. On all media, the strain grows slowly at 4 ° C and 35 ° C, moderately at 16 ° C, rapidly between 20 – 30 ° C, and does not grow at 40 ° C.	en	Bessadat, Nabahat, Bataillé-Simoneau, Nelly, Colou, Justine, Hamon, Bruno, Mabrouk, Kihal, Simoneau, Philippe (2025): New members of Alternaria (Pleosporales, Pleosporaceae) collected from Apiaceae in Algeria. MycoKeys 113: 169-192, DOI: 10.3897/mycokeys.113.138005
