taxonID	type	description	language	source
CF6987FDFFC13A12FEDFFA0AFEFC1CC0.taxon	description	(Fig. 2)	en	Romero, Stella Maris, Andrade, Ernesto Rodríguez, Romero, Andrea Irene, Amarilla, Leonardo David, Comerio, Ricardo M. (2025): A new heat-resistant species of Leiothecium Samson & Mouch. (Eurotiales, Ascomycota) from soil of Argentina. Cryptogamie, Mycologie 20 (4): 51-60, DOI: 10.5252/cryptogamie-mycologie2025v46a4, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/mycologie2025v46a4.pdf
CF6987FDFFC13A12FEDFFA0AFEFC1CC0.taxon	diagnosis	DIAGNOSIS. — Leiothecium dictyophorum S. M. Romero & Comerio, sp. nov.; ex affinitate L. ellipsoidei Samson & Mouch. et L. cristati Y. Marín, Stchigel & Cano, ab utroque ascosporarum ornamento reticulato-foveato sine manifestis cristis distinctum. Leiothecium dictyophorum S. M. Romero & Comerio sp. nov.; of the affinity of L. ellipsoideum Samson & Mouch. and L. cristatum Y. Marín, Stchigel & Cano, distinct from both by the ascospores’ ornament reticulate-foveate without prominent crests.	en	Romero, Stella Maris, Andrade, Ernesto Rodríguez, Romero, Andrea Irene, Amarilla, Leonardo David, Comerio, Ricardo M. (2025): A new heat-resistant species of Leiothecium Samson & Mouch. (Eurotiales, Ascomycota) from soil of Argentina. Cryptogamie, Mycologie 20 (4): 51-60, DOI: 10.5252/cryptogamie-mycologie2025v46a4, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/mycologie2025v46a4.pdf
CF6987FDFFC13A12FEDFFA0AFEFC1CC0.taxon	materials_examined	TYPE MATERIAL. — Argentina • Catamarca, RN 60 km 1016; 29 ° 30 ’ 4 ” S, 65 ° 37 ’ 57 ” W; 237 m alt.; 22. VIII. 2011; S. M. Romero leg.; Holotype: BAFC 53468 (dried culture); BAFCcult 4595 = FMR ≈ 15063, culture ex type; GenBank BenA sequence PP 149064, rpb 2 sequence PP 149071. ADDITIONAL SPECIMENS STUDIED. — Argentina • Catamarca; RN 60 km 1102; 28 ° 55 ’ 15 ” S, 66 ° 08 ’ 46 ” W; 338 m alt.; 5. I. 2009; BAFCcult 4599 = FMR 16764 • RN 38 km 563; 28 ° 35 ’ 5 ” S, 65 ° 52 ’ 27 ” W; 522 m alt.; 12. I. 2009; BAFCcult 4592 = FMR 15065 • RN 60 km 1016; 29 ° 30 ’ 4 ” S, 65 ° 37 ’ 57 ” W; 237 m alt.; 2. I. 2010; BAFCcult 4608 = FMR 15066 • RN 38 km 563; 28 ° 35 ’ 5 ” S, 65 ° 52 ’ 27 ” W; 522 m alt.; 23. VIII. 2011; BAFCcult 4597 = FMR 15067, FMR 16766, BAFCcult 4596 = FMR 16767. MYCOBANK. — MB 857727.	en	Romero, Stella Maris, Andrade, Ernesto Rodríguez, Romero, Andrea Irene, Amarilla, Leonardo David, Comerio, Ricardo M. (2025): A new heat-resistant species of Leiothecium Samson & Mouch. (Eurotiales, Ascomycota) from soil of Argentina. Cryptogamie, Mycologie 20 (4): 51-60, DOI: 10.5252/cryptogamie-mycologie2025v46a4, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/mycologie2025v46a4.pdf
CF6987FDFFC13A12FEDFFA0AFEFC1CC0.taxon	etymology	ETYMOLOGY. — Dictyon (δικτΥΟΝ, net) and phorum (ΦΟΡΟς, bearing) were combined to coin dictyophorum (adj.): net-bearing; regarding the distinctly net-like ornamentation of ascospores.	en	Romero, Stella Maris, Andrade, Ernesto Rodríguez, Romero, Andrea Irene, Amarilla, Leonardo David, Comerio, Ricardo M. (2025): A new heat-resistant species of Leiothecium Samson & Mouch. (Eurotiales, Ascomycota) from soil of Argentina. Cryptogamie, Mycologie 20 (4): 51-60, DOI: 10.5252/cryptogamie-mycologie2025v46a4, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/mycologie2025v46a4.pdf
CF6987FDFFC13A12FEDFFA0AFEFC1CC0.taxon	description	LATIN DESCRIPTION Coloniae in agaro malto confecto, 25 ° C, post 7 dies, 75 - 79 mm diam., fuscae, albis annulis mycelialibus praeditae; pars aversa fusca. In agaro farina avenae confecto, 25 ° C, post 7 dies, 60 - 64 mm diam., fuscae, quasi continuum stratum ascomatum efficientes, mycelium aerium vix effectum. Hyphae hyalinae, laeves, 3 - 11 µm diam. Cleistothecia globosa, glabra, atro-brunnea, 40 - 125 µm diam., inter mycelium aerium disposita vel in substratum semiimmersa; parietes cleistotheciorum persistentes, 5 - 8 µm lati, texturam angularem praebentes, e cellulis atro-brunneis crassitunicatis 15 - 25 µm diam. compositi. Asci globosi vel subglobosi, 13 - 15 × 14 - 18 µm, octospori, evanescentes. Ascosporae unicelulares, ellipsoideae, hyalinae, ornamentum reticulatum-foveatum ostendentes, 5.5 - 7 × 7 - 9 µm. Chlamydosporae subglobosae vel ellipsoideae, hyalinae, plerumque terminales umbonataeque, nonnumquam intercalares, etiam endogenae, crassitunicatae, 6 - 18 × 5 - 12.5 µm diam. ENGLISH DESCRIPTION Colonies on MEA, 25 ºC, 7 days, 75 - 79 mm diam., dark, with aerial white mycelium in concentric circles; reverse dark (Fig. 2 A). At 35 ° C, covering the whole plate before 7 days; reverse dark due to numerous ascomata. At 15 ° C, 7 days, 0 - 8 mm diam.; at 40 ° C, 7 days, 21 - 31 mm diam. On PDA, 25 ° C, covering the whole plate at 7 days, dark, with scarce aerial white mycelium, reverse dark. On OA, 25 ° C, 7 days, 60 - 64 mm, dark colonies forming an almost continuous layer of ascomata, aerial mycelium scarce (Fig. 2 B). At 35 ° C, spreading all over the plate before 7 days; development in subtle circles, aerial mycelium less floccose than in MEA. On CY 20 S, 25 ° C, 7 days, 83 mm diam. On MY 50 G, 25 ° C, 7 days, 42 mm diam. Mycelium composed of hyaline, smooth-walled, hyphae, 3 - 11 µm wide. Cleistothecial ascomata, globose, glabrous, dark-brown 40 - 125 µm diam., both intermixed within the white mycelium and semi-submerged in agar (Fig. 2 C, D); with a persistent wall, textura angularis, 5 - 8 µm thick, composed of dark brown thick-walled cells of 15 - 25 µm diam. (Fig. 2 F, G). Asci globose to subglobose, 13 - 15 × 14 - 18 µm, eight-spored, evanescent. Ascospores one-celled, ellipsoidal, hyaline, 5.5 - 7 × 7 - 9 µm, loosely reticulated (Fig. 2 I); SEM shows a reticulated-foveate ornamentation in mature ascospores. Chlamydospores present, subglobose to ellipsoidal, hyaline, usually terminal but sometimes intercalary, endogenously generated present as well, smooth- and thick-walled, 6 - 18 × 5 - 12.5 µm.	en	Romero, Stella Maris, Andrade, Ernesto Rodríguez, Romero, Andrea Irene, Amarilla, Leonardo David, Comerio, Ricardo M. (2025): A new heat-resistant species of Leiothecium Samson & Mouch. (Eurotiales, Ascomycota) from soil of Argentina. Cryptogamie, Mycologie 20 (4): 51-60, DOI: 10.5252/cryptogamie-mycologie2025v46a4, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/mycologie2025v46a4.pdf
CF6987FDFFC13A12FEDFFA0AFEFC1CC0.taxon	discussion	NOTES Leiothecium dictyophorum S. M. Romero & Comerio, sp. nov. displayed a distinctive ascospore ornamentation which set it morphologically apart from L. ellipsoideum and L. cristatum, consisting in a reticulate-foveate-net-ascospores without prominent crests (Fig. 2 N). Some ascospores of L. dictyophorum S. M. Romero & Comerio, sp. nov. have shown areas where the net was not completely developed, as it is shown at the central region of the ascospore illustrated in the Fig. 2 M. Probably, this particular feature, present in several ascospores, reflects some unripeness degree. Leiothecium dictyophorum S. M. Romero & Comerio, sp. nov. ascospores has not exhibited prominent crests as L. ellipsoideum (Fig. 3 C, D) and L. cristatum clearly do. The referred difference between ascospores of L. dictyophorum S. M. Romero & Comerio, sp. nov. and L. ellipsoideum is illustrated in Fig. 3.	en	Romero, Stella Maris, Andrade, Ernesto Rodríguez, Romero, Andrea Irene, Amarilla, Leonardo David, Comerio, Ricardo M. (2025): A new heat-resistant species of Leiothecium Samson & Mouch. (Eurotiales, Ascomycota) from soil of Argentina. Cryptogamie, Mycologie 20 (4): 51-60, DOI: 10.5252/cryptogamie-mycologie2025v46a4, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/mycologie2025v46a4.pdf
