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Species MB516051 Herpothallon sipmanii Aptroot, Lücking & Rivas Plata 2009   Bibliography: Aptroot, A.; Thor, G.; Lücking, R.; Elix, J.A.; Chaves, J.L., 2009, Bibliotheca Lichenologica 99: 64 (more info) Year of publication: 2009 Status of the name: basionym; legitimate MycoBank's opinion: currently used Classification: Fungi, Ascomycota, Pezizomycotina, Arthoniomycetes, Arthoniomycetidae, Arthoniales, Arthoniaceae, Herpothallon Obligate synonym(s): none Morphic status: Teleomorph (anamorph connection(s) unknown or not recorded) Taxonomic synonym(s): Ordered by epithet name none Descriptions: Latin diagnosis Thallus corticola, arcte adhaerens, griseus, pseudisidiis absentis, schizidiis applanatis, proliferatis, acidum protocetraricum vel hypoprotocetraricum continens, subtus hypothallo byssoideo albo, prothallo byssoideo albo circumcinctus. Apothecia et pycnidia ignota. Original description Thallus lichenized with trentepohloid algae, corticolous, effuse, felty-byssoid, ecorticate, pale green to almost white in parts (somewhat resembling Cryptothecia). Disc-shaped isidia-like structures present and abundant, obliquely upright and attached to thallus with one side, up to 0.6 x 0.4 mm large, with a felty-byssoid surface (appearing finely striate-pruinose). Ascomata unknown. Secondary chemistry: protocetraric and hypoprotocetraric acids (thallus P+ orange-red). Original description Thallus corticolous, up to 10 cm diam., rather firmly appressed to the substrate, more or less distinctly byssoid, dull, pale mineral green to whitish-grey; in section up to 300 µm thick, without calcium oxalate, with 1-2 µm wide hyphae. Hypothallus below the entire thallus, rather compact, brownish-black, composed of 1–2 µm wide, brown hyphae. Prothallus up to 1 mm wide, byssoid, composed of interwoven and radiating hyphae, whitish. Pseudisidia numerous, flattened and almost disc-shaped (schizidia), obliquely attached, flat to slightly convex, round to elongate with wavy outlines (appearing proliferating), grey to pinkish-white, up to 0.6 x 0.3 mm. Photobiont cells single or rarely aggregated, 6-14 × 5-10 µm. Remarks: Herpothallon sipmanii is dedicated to our colleague and friend, Harrie Sipman, for his important contributions to tropical lichenology. The new species is characterized by the regular schizidia (applanate, disc-shaped pseudisidia) without conidia, and differs from all other Herpothallon species in its chemistry, with protocetraric acid, which is otherwise only found as accessory substance in H. antillarum. The latter differs by its thicker, fragile thallus with compacted black hypothallus and by its cylindrical isidia. The thallus of H. sipmanii is more closely appressed, but rests mostly on a white hypothallus, similar to that of H. granulare. Date entered: 07/01/2010 02:59:39 Date of release: 07/01/2010 02:59:39 Entered by: Dr. Robert Lücking The Field Museum, United States Type specimen Description: MBSPEC 50629 Herbarium number: 1155 Collected by: Rivas Plata & Lücking, March 2007 Substrate: bark Location: PHILIPPINES. Nueva Vizcaya: Luzon, Mt. Palali