The lichen genus Buellia de Not. in the greater Sonoran Desert Region: saxicolous species with one-septate ascospores (original) (raw)
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The following species of Buellia s.l. from the Greater Sonoran Desert Region are described new to science: Buellia nashii, B. navajoensis, B. regineae and B. sheardii. A valid description is provided for B. lepidastroidea, a name introduced by Imshaug, but never validly published. Buellia argillicola is reported from the Sonoran Region for the first time. A single record of the rare and unusual B. vilis is reported from Arizona. Buellia novomexicana and B. fusca are synonymized with B. tyrolensis. Detailed descriptions are provided for all these species. In addition a dichotomous key includes all saxicolous species with one-septate ascospores currently known from the Greater Sonoran Desert Region. Zusammenfassung-Die folgenden neuen Arten der Sammelgattung Buellia s.l. werden aus der Sonoraregion beschrieben: Buellia nashii, B. navajoensis, B. regineae and B. sheardii. Eine weitere Art ist Buellia lepidastroidea. Diese Art wurde bereits von Imshaug vorgeschlagen, aber nicht gültig publiziert. Sie wird hier erstmals mit einer gültigen Artdiagnose versehen. Buellia argillicola wird erstmals aus der Sonoraregion nachgewiesen. Ein Einzelfund der seltenen und ungewöhnlichen Art B. vilis wird aus Arizona gemeldet. Buellia novomexicana und B. fusca werden mit B. tyrolensis synonymisiert. Alle diese Arten sind hier detailliert beschrieben. Darüber hinaus ermöglicht ein dichotomer Schlüssel die Bestimmung aller bisher aus der Region bekannten, saxikolen Arten mit zweizelligen Sporen. Key Words-taxonomy, lichenized ascomycetes, Physciaceae, new species, dichotomous key the type locality and agrees well with the description in the protologue. -Crustose, thin, usually growing in distinct circular patches, subeffigurate, several thalli often confluent, epilithic; continuous to rimose with fine fissures; prothallus distinct, delimiting the thallus as a black outline; thallus surface matt and chalky, dull, usually white, rarely gray, heavily pruinose, phenocorticate; entire thallus filled with an abundance of calcium oxalate (H 2 SO 4 + forming clusters of needle shaped crystals).
New species and new records of the lichen genus Buellia sensu lato (Caliciaceae) from India
Plant Science Today, 2020
While revising the lichen genus Buellia sensu lato from India, species Cratiria rubrum with brick red pigmented thallus is described as new to science. The new species is characterized by a red pigmented thallus, Buellia type ascospore, KOH+ red. Five species are reported for the first time from India viz., Amandinea efflorescens, A. incrustans, Baculifera orosa, Hafellia dissa and H. reagens.
Plant Ecology and Evolution
Background – As part of taxonomic revisions of tropical African lichens, two species of Piccolia are described as new to science while a third unknown one collected in the Solomon archipelago was kindly send to us by the second author. Material and Methods – Morphology was studied using a stereo and light microscope. Chemistry was studied with spot tests and TLC. Key results – P. congolensis Van den Broeck, Aptroot & Ertz sp. nov. was collected twice in the Democratic Republic of the Congo and is characterized notably by a thallus with KC+ orange soralia. The material recorded recently from Reunion Island as P. elmeri (Vain.) Hafellner was shown to represent a different species characterized by a completely dark brown excipulum and is described here as P. kalbii Van den Broeck & Ertz sp. nov. P. nivea Van den Broeck, Aptroot & Ertz sp. nov. is only known from the type location on the Solomon archipelago and is characterized by grey pruinose ascomata and a thallus resembling a lepros...
Sydowia, 2021
The lichen biota of several regions of Mexico is scarcely known, including the central part of the country, where the state of Aguascalientes is located. Before this study, lichen records of Aguascalientes were almost nonexistent. The aim of this work was to catalogue the lichen biota from arid environments of Aguascalientes, a widespread habitat in this part of Mexico. A total of 253 samples were collected and 20 families, 44 genera, and 56 lichen species were detected. The families with the highest species richness are Physciaceae (13) and Verrucariaceae (nine); the genus with the highest number of species is Physcia (Physciaceae; five). The lichenized fungi identified up to species level were found growing mainly on rock (33) and bark (14). The most common growth forms were crustose (55 %) and foliose (43 %). All species (56) are new records for Aguascalientes; Phaeophyscia hirtella (Physciaceae) and Scytinium subaridum (Collemataceae) are, in addition, new records for the country, and seven species represent the second collection documented for Mexico. This is the first work on the lichens of Aguascalientes. The results contribute to the biodiversity knowledge of Mexico and remark the need to increase efforts to improve the Mexican lichen biota inventory.
Plant Systematics and Evolution, 1992
Important characters in the classification of the lichenized family Alectoriaceae (Lecanorales) are discussed and evaluated. A few associated genera presently accommodated in the family Parmeliaceae (Lecanorales) are also discussed. Characters in the asci and hamathecium are of major importance, but structural characters such as general thallus organization and anatomy of cortical layers must also be considered. Secondary chemical products, however, were not found to be decisive for the circumscription of this family.
Ascoma morphology is homoplaseous and phylogenetically misleading in some pyrenocarpous lichens
Mycologia, 2005
The phylogenetic relationships of many lichen-forming perithecioid ascomycetes are unknown. We generated nuLSU and mtSSU rDNA sequences of members of seven families of pyrenocarpous lichens and used a Bayesian framework to infer a phylogenetic estimate. Members of the perithecioid Protothelenellaceae, Thelenellaceae and Thrombiaceae surprisingly cluster within the mainly discocarpous Lecanoromycetes, while Strigulaceae, Verrucariaceae and Pyrenulaceae are related to the ascolocular Chaetothyriomycetes. Micromorphological studies of the ascomata showed that the two main groups of pyrenocarpous lichen-forming fungi differ in their ascus types. The Strigulaceae, Verrucariaceae and Pyrenulaceae have apically and laterally thickwalled asci, whereas the Thelenellaceae, Protothelenellaceae and Thrombiaceae have only apically thickened asci. The latter two show ring-shaped amyloid apical structures. Based on morphological and molecular evidence we propose to reduce Thrombiaceae to synonymy with Protothelenellaceae.
The Lichen Genusbulbothricella, a New Segregate in Theparmeliaceaefrom Venezuela
The Lichenologist, 1996
The new genus Bulbothricella (Lichenized Ascomycotina,Parmeliaceae with the single species B. amazonensis (Marcano, Galiz & Morales) Marcano, Galiz, Morales & Mohali is segregated from Bulbothrix. This conclusion is based on an investigation of morphological, anatomical and chemical characters using scanning electron microscopy and thin-layer chromatography. The new genus is characterized by a pored epicortex, 12—14 spores per ascus, obovate and acrogenous conidia, and an anatomical structure and cortical chemistry resembling that of Bulbothrix..