taxonID	type	description	language	source
9A0808507B665A07B4129DD842C7FF42.taxon	description	Fig. 2	en	Phraphuchamnong, Phimpisa, Nelsen, Matthew P., Distefano, Isabel, Mercado-Diaz, Joel A., Parnmen, Sittiporn, Rangsiruji, Achariya, Buaruang, Kawinnat, Luecking, Robert, Lumbsch, H. Thorsten (2022): A new species of Megalaria (Ramalinaceae, Ascomycota) from Thailand, and recognition of subgenus Catillochroma. MycoKeys 93: 149-163, DOI: http://dx.doi.org/10.3897/mycokeys.93.90962, URL: http://dx.doi.org/10.3897/mycokeys.93.90962
9A0808507B665A07B4129DD842C7FF42.taxon	materials_examined	Type. Thailand. Chumphon province: Pathio District; Tambon Pak Klong, 10 ° 53.255 ' N, 99 ° 28.649 ' E, 5 m elev., mangrove forest, on bark of Rhizophora mucronata, 28 March 2019; Kawinnat Buaruang et al., Chum 2771 (RAMK 034555 - holotype, F-isotype).	en	Phraphuchamnong, Phimpisa, Nelsen, Matthew P., Distefano, Isabel, Mercado-Diaz, Joel A., Parnmen, Sittiporn, Rangsiruji, Achariya, Buaruang, Kawinnat, Luecking, Robert, Lumbsch, H. Thorsten (2022): A new species of Megalaria (Ramalinaceae, Ascomycota) from Thailand, and recognition of subgenus Catillochroma. MycoKeys 93: 149-163, DOI: http://dx.doi.org/10.3897/mycokeys.93.90962, URL: http://dx.doi.org/10.3897/mycokeys.93.90962
9A0808507B665A07B4129DD842C7FF42.taxon	diagnosis	Diagnosis. Similar to Megalaria bengalensis, but differs in an ochre to brownish apothecial disc (black in M. bengalensis) and in lacking isidia and secondary products (atranorin in M. bengalensis).	en	Phraphuchamnong, Phimpisa, Nelsen, Matthew P., Distefano, Isabel, Mercado-Diaz, Joel A., Parnmen, Sittiporn, Rangsiruji, Achariya, Buaruang, Kawinnat, Luecking, Robert, Lumbsch, H. Thorsten (2022): A new species of Megalaria (Ramalinaceae, Ascomycota) from Thailand, and recognition of subgenus Catillochroma. MycoKeys 93: 149-163, DOI: http://dx.doi.org/10.3897/mycokeys.93.90962, URL: http://dx.doi.org/10.3897/mycokeys.93.90962
9A0808507B665A07B4129DD842C7FF42.taxon	etymology	Etymology. The specific epithet refers to the English translation (Pachaylen) of the Thai name for mangrove (ป ่ าชายเลน), and philos (greek) = friend, referring to the ecological preference of the new species.	en	Phraphuchamnong, Phimpisa, Nelsen, Matthew P., Distefano, Isabel, Mercado-Diaz, Joel A., Parnmen, Sittiporn, Rangsiruji, Achariya, Buaruang, Kawinnat, Luecking, Robert, Lumbsch, H. Thorsten (2022): A new species of Megalaria (Ramalinaceae, Ascomycota) from Thailand, and recognition of subgenus Catillochroma. MycoKeys 93: 149-163, DOI: http://dx.doi.org/10.3897/mycokeys.93.90962, URL: http://dx.doi.org/10.3897/mycokeys.93.90962
9A0808507B665A07B4129DD842C7FF42.taxon	description	Description. Thallus crustose, corticolous, gray to olive-gray or greenish gray, up to 10 cm in diameter, smooth, cracked, without soredia or isidia. Apothecia biatorine, plain and flat, becoming slightly convex with age, circular in outline or becoming deformed, sessile, 0.3 - 0.8 mm in diameter; margins black, shining, contrasting strongly with the coloration of the discs; discs beige to brownish, epruinose. Epihymenium 2 - 5 μm thick, not pigmented or light beige, K-, N-. Hymenium 75 - 100 μm thick, hyaline, not inspersed. Subhymenium 10 - 20 μm thick, hyaline. Central hypothecium 50 - 80 μm thick, pigmented red-brown, K + wine-red, N-; lateral hypothecium blue to blue-black, K-, N + purple. Excipulum 15 - 25 μm thick, comprised of thick, gelatinized hyaline to blue hyphae, not inspersed with crystals, K-, N + purple. Asci cylindrical to clavate, eight-spored; ascospores narrowly ellipsoid, hyaline, one-septate (rarely simple), thin walled, not halonate, (9 -) 11 - 15 x 4 - 5 μm. Pycnidia not seen. Secondary metabolites. Thallus K-, C-, and KC-, UV-, no lichen substances found using TLC.	en	Phraphuchamnong, Phimpisa, Nelsen, Matthew P., Distefano, Isabel, Mercado-Diaz, Joel A., Parnmen, Sittiporn, Rangsiruji, Achariya, Buaruang, Kawinnat, Luecking, Robert, Lumbsch, H. Thorsten (2022): A new species of Megalaria (Ramalinaceae, Ascomycota) from Thailand, and recognition of subgenus Catillochroma. MycoKeys 93: 149-163, DOI: http://dx.doi.org/10.3897/mycokeys.93.90962, URL: http://dx.doi.org/10.3897/mycokeys.93.90962
9A0808507B665A07B4129DD842C7FF42.taxon	distribution	Distribution and ecology. The new species was found in the south-eastern province of Chumphon where it was growing in old mangrove forests on the bark of Excoecaria agallocha, Hibiscus tiliaceus, Rhizophora apiculata, and Rhizophora mucronata.	en	Phraphuchamnong, Phimpisa, Nelsen, Matthew P., Distefano, Isabel, Mercado-Diaz, Joel A., Parnmen, Sittiporn, Rangsiruji, Achariya, Buaruang, Kawinnat, Luecking, Robert, Lumbsch, H. Thorsten (2022): A new species of Megalaria (Ramalinaceae, Ascomycota) from Thailand, and recognition of subgenus Catillochroma. MycoKeys 93: 149-163, DOI: http://dx.doi.org/10.3897/mycokeys.93.90962, URL: http://dx.doi.org/10.3897/mycokeys.93.90962
9A0808507B665A07B4129DD842C7FF42.taxon	materials_examined	Additional specimens examined. Thailand. Chumphon province: Pathio District; Chum Kho sub-district, mangrove forest, on bark of Rhizophora apiculata, 15 Feb 2018; K. Buaruang et al., Chum 2024 (RAMK), 2028 (RAMK), 2072 (RAMK). Below we propose new combinations to reflect the broad recognition of Megalaria and the recognition of the Catillochroma clade at subgeneric level:	en	Phraphuchamnong, Phimpisa, Nelsen, Matthew P., Distefano, Isabel, Mercado-Diaz, Joel A., Parnmen, Sittiporn, Rangsiruji, Achariya, Buaruang, Kawinnat, Luecking, Robert, Lumbsch, H. Thorsten (2022): A new species of Megalaria (Ramalinaceae, Ascomycota) from Thailand, and recognition of subgenus Catillochroma. MycoKeys 93: 149-163, DOI: http://dx.doi.org/10.3897/mycokeys.93.90962, URL: http://dx.doi.org/10.3897/mycokeys.93.90962
