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Pyxine sorediata (Canary Islands, Tenerife, 1967, Santesson 19332, UPS). Note the spotted pruina and the distinct marginal pseudocyphellae. x 8.
Source publication
Six species of Pyxine have been reported from Europe (including the Azores), but only two, Pyxine sorediata (syn. P. endochrysoides) and P. subcinerea (syn. P. chrysanthoides), are now accepted, the remaining four being excluded for various reasons. Buellia convexa is found to be a synonym of B. pulverulenta.
Contexts in source publication
Context 1
... -, marginal pseudocyphellae prominent because of the dark lobe mar- gins, pruina± spotted. Fig. 1 The Species For further synonymy see Swinscow & Krog (1975a: ...
Context 2
... foliose, + orbicular, loosely adpressed, grey to brownish grey, some- what darker towards the margins. Lobes rounded, concave and slightly erose at the ends with marginal, white pseudocyphellae distinctly contrasting with the dark lobe margins. Pruina mostly on the outer parts of the lobes, typically spotted ( Fig. 1). Soralia marginal, distinctly delimited but spreading onto the lamina and forming round patches. Soredia granular and dark grey, giving central parts of the thallus a dark grey colour. Underside black to greyish black with simple, black rhizinae. Upper cortex paraplectenchymatous, lower cortex prosoplectenchy- matous. Medulla yellow ...
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Citations
... It occurs in lichen communities characterized by a high incidence of oceanic species, mainly on Olea, more rarely on isolated holm oak trees. The species is locally extinct in most of the stations of the western Riviera (Ravera & Giordani 2008), where it was reported in the first decades of the last century (Moberg 1983, Nimis 1993. According to , the Italian range of this species is expected to have a severe reduction in the next years due to its higher sensitivity to climate change. ...
We present new data concerning lichen species of the Italian flora and confirm 36 national red-listed species.
... La présence de lichéxanthone dans le cortex supérieur (réagissant K-, UV+ jaune) permet de distinguer facilement cette espèce de P. sorediata (Ach) Mont. -seule autre espèce du genre Pyxine également présente en France (MASSON, 2008) et en Europe (MOBERG, 1983) -dont le cortex supérieur contient de l'atranorine (réagissant K+ jaune, UV-). Pyxine sorediata possède, par ailleurs, une combinaison de triterpènes médullaires différente de celle de P. subcinerea (Fig. 15) Sa répartition européenne est fort similaire à celle de Physcia erumpens (Fig. 10) : quelques localités proches du littoral atlantique au Portugal, notamment dans la région de Lisbonne (BREUSS, 1989 ;SALES & HEDGE, 2000 ; VAN DEN BOOM, 2006SÉRGIO et al., 2016) et plusieurs localités le long des côtes ligure et tyrrhénienne en Italie (MOBERG, 1983 ;MODENESI et al., 2001 ;RAVERA & GIORDANI, 2008 ;GIORDANI et al., 2009 ;BENESPERI et al., 2013 ;NIMIS, 2016). ...
... -seule autre espèce du genre Pyxine également présente en France (MASSON, 2008) et en Europe (MOBERG, 1983) -dont le cortex supérieur contient de l'atranorine (réagissant K+ jaune, UV-). Pyxine sorediata possède, par ailleurs, une combinaison de triterpènes médullaires différente de celle de P. subcinerea (Fig. 15) Sa répartition européenne est fort similaire à celle de Physcia erumpens (Fig. 10) : quelques localités proches du littoral atlantique au Portugal, notamment dans la région de Lisbonne (BREUSS, 1989 ;SALES & HEDGE, 2000 ; VAN DEN BOOM, 2006SÉRGIO et al., 2016) et plusieurs localités le long des côtes ligure et tyrrhénienne en Italie (MOBERG, 1983 ;MODENESI et al., 2001 ;RAVERA & GIORDANI, 2008 ;GIORDANI et al., 2009 ;BENESPERI et al., 2013 ;NIMIS, 2016). Dans ce dernier pays, cette espèce figure dans la catégorie « vulnérable » dans la liste rouge des lichens épiphytes (NASCIMBENE et al., 2013). ...
... D'après les données éparses figurant dans la littérature, P. subcinerea est un lichen surtout corticole, occasionnellement lignicole ou saxicole. On le rencontre dans des stations assez ombragées, à des altitudes très variables dans la zone intertropicale mais plutôt à basse altitude dans ses localités à climat tempéré (SWINSCOW & KROK, 1975 ;MOBERG, 1983 ;KALB, 1987KALB, , 2002AMTOFT, 2002 ;GALLOWAY, 2007 ;MONGKOLSUK et al., 2012 ;NIMIS, 2016). En Italie, P. subcinerea a surtout été rencontrée sur Olea europea et Quercus ilex, mais aussi sur Quercus pubescens et Cupressus sp. ...
The discovery in France of the macrolichens Collema curtisporum Degel, Physcia erumpens Moberg and Pyxine subcinerea Stirt. is reported and documented. The main diagnostic characters, distribution and ecology of each of the three taxa are specified and discussed.
... Presently this genus comprises 75 species that occur on bark, wood, mosses or rocks (Mongkolsuk et al. 2012). Species in this genus are mainly distributed from pantropical to subtropical and few species extend to temperate or oceanic regions (Moberg 1983;Kalb 1987;Wei and Hur 2007;Elix 2009;Mongkolsuk et al. 2012;Yang et al. 2019b). Previously this genus was placed in the family Physciaceae. ...
Fungal diversity notes is one of the important journal series of fungal taxonomy that provide detailed descriptions and illustrations of new fungal taxa, as well as providing new information of fungal taxa worldwide. This article is the 11th contribution to the fungal diversity notes series, in which 126 taxa distributed in two phyla, six classes, 24 orders and 55 families are described and illustrated. Taxa in this study were mainly collected from Italy by Erio Camporesi and also collected from China, India and Thailand, as well as in some other European, North American and South American countries. Taxa described in the present study include two new families, 12 new genera, 82 new species, five new combinations and 25 new records on new hosts and new geographical distributions as well as sexual-asexual reports. The two new families are Eriomycetaceae (Dothideomycetes, family incertae sedis) and Fasciatisporaceae (Xylariales, Sordariomycetes). The twelve new genera comprise Bhagirathimyces (Phaeosphaeriaceae), Camporesiomyces (Tubeufiaceae), Eriocamporesia (Cryphonectriaceae), Eriomyces (Eriomycetaceae), Neomonodictys (Pleurotheciaceae), Paraloratospora (Phaeosphaeriaceae), Paramonodictys (Parabambusicolaceae), Pseudoconlarium (Diaporthomycetidae, genus incertae sedis), Pseudomurilentithecium (Lentitheciaceae), Setoapiospora (Muyocopronaceae), Srinivasanomyces (Vibrisseaceae) and Xenoanthostomella (Xylariales, genera incertae sedis). The 82 new species comprise Acremonium chiangraiense, Adustochaete nivea, Angustimassarina camporesii, Bhagirathimyces himalayensis, Brunneoclavispora camporesii, Camarosporidiella camporesii, Camporesiomyces mali, Camposporium appendiculatum, Camposporium multiseptatum, Camposporium septatum, Canalisporium aquaticium, Clonostachys eriocamporesiana, Clonostachys eriocamporesii, Colletotrichum hederiicola, Coniochaeta vineae, Conioscypha verrucosa, Cortinarius ainsworthii, Cortinarius aurae, Cortinarius britannicus, Cortinarius heatherae, Cortinarius scoticus, Cortinarius subsaniosus, Cytospora fusispora, Cytospora rosigena, Diaporthe camporesii, Diaporthe nigra, Diatrypella yunnanensis, Dictyosporium muriformis, Didymella camporesii, Diutina bernali, Diutina sipiczkii, Eriocamporesia aurantia, Eriomyces heveae, Ernakulamia tanakae, Falciformispora uttaraditensis, Fasciatispora cocoes, Foliophoma camporesii, Fuscostagonospora camporesii, Helvella subtinta, Kalmusia erioi, Keissleriella camporesiana, Keissleriella camporesii, Lanspora cylindrospora, Loratospora arezzoensis, Mariannaea atlantica, Melanographium phoenicis, Montagnula camporesii, Neodidymelliopsis camporesii, Neokalmusia kunmingensis, Neoleptosporella camporesiana, Neomonodictys muriformis, Neomyrmecridium guizhouense, Neosetophoma camporesii, Paraloratospora camporesii, Paramonodictys solitarius, Periconia palmicola, Plenodomus triseptatus, Pseudocamarosporium camporesii, Pseudocercospora maetaengensis, Pseudochaetosphaeronema kunmingense, Pseudoconlarium punctiforme, Pseudodactylaria camporesiana, Pseudomurilentithecium camporesii, Pseudotetraploa rajmachiensis, Pseudotruncatella camporesii, Rhexocercosporidium senecionis, Rhytidhysteron camporesii, Rhytidhysteron erioi, Septoriella camporesii, Setoapiospora thailandica, Srinivasanomyces kangrensis, Tetraploa dwibahubeeja, Tetraploa pseudoaristata, Tetraploa thrayabahubeeja, Torula camporesii, Tremateia camporesii, Tremateia lamiacearum, Uzbekistanica pruni, Verruconis mangrovei, Wilcoxina verruculosa, Xenoanthostomella chromolaenae and Xenodidymella camporesii. The five new combinations are Camporesiomyces patagoniensis, Camporesiomyces vaccinia, Camposporium lycopodiellae, Paraloratospora gahniae and Rhexocercosporidium microsporum. The 22 new records on host and geographical distribution comprise Arthrinium marii, Ascochyta medicaginicola, Ascochyta pisi, Astrocystis bambusicola, Camposporium pellucidum, Dendryphiella phitsanulokensis, Diaporthe foeniculina, Didymella macrostoma, Diplodia mutila, Diplodia seriata, Heterosphaeria patella, Hysterobrevium constrictum, Neodidymelliopsis ranunculi, Neovaginatispora fuckelii, Nothophoma quercina, Occultibambusa bambusae, Phaeosphaeria chinensis, Pseudopestalotiopsis theae, Pyxine berteriana, Tetraploa sasicola, Torula gaodangensis and Wojnowiciella dactylidis. In addition, the sexual morphs of Dissoconium eucalypti and Phaeosphaeriopsis pseudoagavacearum are reported from Laurus nobilis and Yucca gloriosa in Italy, respectively. The holomorph of Diaporthe cynaroidis is also reported for the first time.
... Pyxine, es un género cosmopolita, poco estudiado en Argentina (Osorio,1969(Osorio, , 1978(Osorio, , 1981(Osorio, , 1990Osorio & Ferraro, 1975;Ferraro, 1978;Moberg, 1983;Scutari, 1992Scutari, ,1995Estrabou et al., 2006;Michlig & Ferraro, 2012b;Rodriguez et al., 2016). En todo el mundo, se han reportado aproximadamente 70 especies, de distribución principalmente pantropical a subtropical, con algunas especies que se extienden a regiones templadas u oceánicas de las cuales 34 especies han sido halladas en Brasil (Swinscow & Krog, 1975, 1988Rogers, 1986;Aptroot, 1987Aptroot, , 2014Kalb, 1987Kalb, , 2002Schumm, 2008;Elix, 2009;Jungbluth, 2010;Mongkolsuk et al., 2012). ...
... Distribución geográfica. Pyxine sorediata es una especie pantropical y subtropical (Aptroot, 1987), fue mencionada en el norte, centro y sur de América, Europa, Asia, en África en Etiopia, Kenia y Tanzania (Moberg, 1983;Swinscow & Krog, 1988, Mongkolsuk et al., 2012, Australia y Asia (Elix, 2009 Pedro, RBY, PP Moconá, Sendero "La Gruta", sobre rama caída, 27° 9' 13'' S -53° 54' 4' ' W, 17-V-2008, Michlig et al. 931 (CTES). ...
p> Introducción y objetivos: Pyxine (Lecanorales, Physciaceae), es un género interesante, poco conocido en el territorio argentino, por ello se presenta un estudio de las especies, presentes en la Reserva de la Biosfera Yaboty (Misiones, Argentina).
M&M: La identificación de las especies fue realizada siguiendo la metodología convencionalmente utilizada para el estudio de los líquenes, que incluye un análisis morfológico y químico. Los caracteres macroscópicos fueron estudiados con un microscopio estereoscópico. Para determinar el tipo de plecténquima y estudiar la morfología de las ascosporas se realizaron cortes a mano alzada, que fueron posteriormente montados en hidróxido de potasio al 5% para ser observados en microscopio óptico. La identificación de las sustancias liquénicas presentes fue realizada mediante reacciones puntuales de color con hidróxido de potasio al 10%, test en cámara de luz ultravioleta y cromatografía de capa delgada con solvente A.
Resultados & conclusiones: En esta contribución se citan por primera vez para la Argentina: Pyxine daedalea, Pyxine katendei, Pyxine maculata y Pyxine sorediata. Se presenta una clave dicotómica y una breve descripción para las especies en el área, distribución geográfica, observaciones e ilustración de cada una de ellas. Se considera que este trabajo es un gran aporte para posteriores trabajos taxonómicos y ecológicos.</p
... The genus Pyxine consists of approximately 70 species. Most species are pantropical to subtropical and a few species extend into temperate or oceanic regions (Elix 2009;Mongkolsuk et al. 2012;Kalb 1987;Moberg 1983;Wei and Hur 2007). ...
In this study, the diversity of Pyxine Fr. in China was assessed based on morphological and chemical traits and molecular data are inferred from ITS and mtSSU sequences. Nineteen species were recognised, including three that are new to science (i.e. P.flavicans M. X. Yang & Li S. Wang, P.hengduanensis M. X. Yang & Li S. Wang and P.yunnanensis M. X. Yang & Li S. Wang) and three records new to China were found (i.e. P.cognata Stirt., P.himalayensis Awas. and P.minuta Vain.). Pyxineyunnanensis is diagnosed by the small size of the apothecia, a white medulla of the stipe and the presence of lichexanthone. Pyxineflavicans is characterised by broad lobes, a pale yellow medulla of the stipe and the presence of atranorin. Pyxinehengduanensis can be distinguished by its pale yellow medulla, marginal labriform soralia and the absence of atranorin. Detailed descriptions of each new species are presented, along with a key to the known species of Pyxine in China.
... Initially Rogers (1986) studied Pyxine from Australia but this treatment was later updated by Kalb (1994) and Elix (2009), where 26 species were reported. Amtoft (2002) studied Pyxine from the eastern United States, Imshaug (1957) from North and Middle America, Kalb (2001) from the Greater Sonoran Desert Region, Hu & Chen (2003) from China, Moberg (1983) from Europe and Kashiwadani (1977a, b, c) from Japan. Obermayer & Kalb (2010) studied three species of Pyxine found in Tibet and adjacent regions. ...
Two new species of Pyxine with yellow medulla from saxicolous habitats are described as new to science. The new species P. punensis has an isidiate, UV+ yellow thallus with 0·3–0·6 mm wide lobes. Pyxine yercaudensis has smaller ascospores (13–16×6–7 µm), lacks vegetative propagules and lacks lichexanthone.
... and P. subcinerea Stirt. have a relatively broad distribution extending to temperate Europe (Moberg 1983). This genus is characterized by a foliose thallus, the pigmented hypothecium, the epihymenium reacting K+ purple, asci with two-to rarely three-celled brown Dirinaria-type ascospores, and 3 to 4 mm long bacillary to sublageniform conidia. ...
The Pyxine pungens complex comprises species producing atranorin in the upper cortex, lacking vegetative propagules and reacting K+ blackish purple in the pigmented medulla. Based mainly on the development of apothecia, pigmentation and development of the internal stipe and chemistry, three new species morphologically similar to P. pungens are described. Pyxine rhodesiaca and P. schechingeri are also treated and compared to this complex of species. © 2011 by the American Bryological and Lichenological Society, Inc.
... • Puy-de-Dôme : mention ancienne de Nylander (voir Moberg, 1983 ...
... Pyxine subcinerea has a mainly tropical to subtropical distribution. In Italy it has a distinctly western range and seems to be distributed along the Tyrrenian coasts (Moberg 1983;Nimis 1993). In Liguria, where the lichen flora is characterized by a high incidence of sub-oceanic and oceanic species (Giordani & Brunialti 2000), it is locally common predominantly along the coastal belt, as a corticolous lichen mainly on Olea. ...
... It grows in rather shaded and wind-protected habitats near the sea (Jørgensen pers. comm. in Moberg 1983) and in the humid valleys of the Ligurian hinterland. According to Jørgensen (Moberg 1983), it is often associated in Liguria with Heterodermia obscurata, Hyperphyscia adglutinata, Parmelia crozalsiana, Phaeophyscia hirsuta, Parmelia perreticulata and other suboceanic or oceanic species occurring in warm and humid situations, such as Parmotrema reticulatum, P. chinense, Normandina pulchella and Leprocaulon microscopicum. ...
... comm. in Moberg 1983) and in the humid valleys of the Ligurian hinterland. According to Jørgensen (Moberg 1983), it is often associated in Liguria with Heterodermia obscurata, Hyperphyscia adglutinata, Parmelia crozalsiana, Phaeophyscia hirsuta, Parmelia perreticulata and other suboceanic or oceanic species occurring in warm and humid situations, such as Parmotrema reticulatum, P. chinense, Normandina pulchella and Leprocaulon microscopicum. Manganelli del Fa' et al. (1989) described the dissolution of weddellite crystals in high thermo-hygrometric conditions. ...
On the thalline lobes of Pyxine subcinerea there are delimited patches of pruina consisting of bipyramidal prisms, bipyramids and druses of weddellite, i.e. calcium oxalate dihydrate (COD), as revealed by X-ray analysis and SEM observations. The disappearance of the crystals from older thalline areas is preceded by an increase in the frequency of corrosion figures, in the form of etch square pits, and a decrease in the number of crystals occurring on the thalline surface. These features follow a dissolution gradient from the lobe apex towards the proximal edges of the patches. The corrosion figures are linked to the thermodynamic metastability of COD. Partial dissolution of the crystals, performed in water and in EDTA, has confirmed this latter assumption. It is thought that the disappearance of pruina, which interferes with the transmission of light to the algal layer, may allow the formation of soredia in mature thalline portions.
... Species are reported as being new to the Azores if no published records were found in Jergensen (1974) or Tavares (1952Tavares ( ,1958Tavares ( ,1964. For the Canary Is the following references were checked: Arvidsson & Wall (1985), Champion (1976), Follmann (1976), Follman & Mies (1986, Klement (1965), Krog & 0sthagen (1980a^), Moberg (1983), 0sthagen & Krog (1976, Topham & Walker (1982). ...
Fifty-five new lichen taxa from the Azores are discussed. Of these, 30 taxa are new records for Macaronesia and 15 are new records for Europe.
