Sticta alpinotropica is a species of saxicolous (rock-dwelling) lichen in the family Peltigeraceae. Found in Papua New Guinea, it was formally described as a new species in 2008 by Dutch lichenologist André Aptroot. The type specimen was collected by the author from the alpine lichen zone on the southeast slope of Mount Wilhelm at an altitude of 4,200 m (13,800 ft). Although it is abundant locally, it is only known to occur at the type locality, where it grows on siliceous rocks and on soil.[1] Because of its small population and extremely limited geographical distribution, it is predicted to be quite vulnerable to potentially deleterious effects of climate change.[2]
The thallus of Sticta alpinotropica reaches 1–4 cm (0.4–1.6 in) in diameter and 1 cm (0.4 in) high, attached to the substrate by a central stalk. The thallus comprises irregularly branched lobes, which are mostly 0.7–2.4 mm wide and 0.1–0.3 mm thick. The upper surface of the thallus is dark chocolate to blackish brown, glossy, and often has shallow reticulations and pits. The lower surface is black and covered with a short felty layer of rhizinae, which are 50–150 μm long and mostly dichotomously branched. The lobes have much incised margins with pockets of isidia projecting upwards and sideways. The rhizines are made up of one row of isodiametric, thick-walled cells, which are about 10 μm in diameter, brown below, and tapering to about 5 μm in diameter. The cyphellae are ochraceous inside, 0.2–0.4 mm deep, and 0.2–0.8 mm wide, with a slightly raised margin that is glossy dark brown to black and 0.1 mm wide. Apothecia, which are occasionally present, are sessile on a small stipe at the tips of lobes, 0.5–5.0 mm wide, and 0.3–1.7 mm high. The chemistry of this lichen does not contain any lichen products, but it has a strong fish-like odour that persists even after 20 years.[1]
Referencesedit
^ abAptroot, André (2008). "Sticta alpinotropica, a new saxicolous lichen species from the alpine zone of Mt Wilhelm, Papua New Guinea". The Lichenologist. 40 (5): 419–422. doi:10.1017/s0024282908007834. S2CID 86179508.
^Aptroot, André; Stapper, Norbert J.; Košuthová, Alica; van Herk, Kok (C.M.) (2021). "Lichens as an indicator of climate and global change". In Letcher, Trevor M. (ed.). Climate Change. Observed Impacts on Planet Earth (3rd ed.). Elsevier B.V. pp. 483–497. doi:10.1016/b978-0-12-821575-3.00023-2. ISBN978-0-12-821575-3.
May 07, 2024
sticta, alpinotropica, species, saxicolous, rock, dwelling, lichen, family, peltigeraceae, found, papua, guinea, formally, described, species, 2008, dutch, lichenologist, andré, aptroot, type, specimen, collected, author, from, alpine, lichen, zone, southeast,. Sticta alpinotropica is a species of saxicolous rock dwelling lichen in the family Peltigeraceae Found in Papua New Guinea it was formally described as a new species in 2008 by Dutch lichenologist Andre Aptroot The type specimen was collected by the author from the alpine lichen zone on the southeast slope of Mount Wilhelm at an altitude of 4 200 m 13 800 ft Although it is abundant locally it is only known to occur at the type locality where it grows on siliceous rocks and on soil 1 Because of its small population and extremely limited geographical distribution it is predicted to be quite vulnerable to potentially deleterious effects of climate change 2 Sticta alpinotropica Scientific classification Domain Eukaryota Kingdom Fungi Division Ascomycota Class Lecanoromycetes Order Peltigerales Family Peltigeraceae Genus Sticta Species S alpinotropica Binomial name Sticta alpinotropicaAptroot 2008 Description editThe thallus of Sticta alpinotropica reaches 1 4 cm 0 4 1 6 in in diameter and 1 cm 0 4 in high attached to the substrate by a central stalk The thallus comprises irregularly branched lobes which are mostly 0 7 2 4 mm wide and 0 1 0 3 mm thick The upper surface of the thallus is dark chocolate to blackish brown glossy and often has shallow reticulations and pits The lower surface is black and covered with a short felty layer of rhizinae which are 50 150 mm long and mostly dichotomously branched The lobes have much incised margins with pockets of isidia projecting upwards and sideways The rhizines are made up of one row of isodiametric thick walled cells which are about 10 mm in diameter brown below and tapering to about 5 mm in diameter The cyphellae are ochraceous inside 0 2 0 4 mm deep and 0 2 0 8 mm wide with a slightly raised margin that is glossy dark brown to black and 0 1 mm wide Apothecia which are occasionally present are sessile on a small stipe at the tips of lobes 0 5 5 0 mm wide and 0 3 1 7 mm high The chemistry of this lichen does not contain any lichen products but it has a strong fish like odour that persists even after 20 years 1 References edit a b Aptroot Andre 2008 Sticta alpinotropica a new saxicolous lichen species from the alpine zone of Mt Wilhelm Papua New Guinea The Lichenologist 40 5 419 422 doi 10 1017 s0024282908007834 S2CID 86179508 Aptroot Andre Stapper Norbert J Kosuthova Alica van Herk Kok C M 2021 Lichens as an indicator of climate and global change In Letcher Trevor M ed Climate Change Observed Impacts on Planet Earth 3rd ed Elsevier B V pp 483 497 doi 10 1016 b978 0 12 821575 3 00023 2 ISBN 978 0 12 821575 3 Retrieved from https en wikipedia org w index php title Sticta alpinotropica amp oldid 1197267617, wikipedia, wiki, book, books, library,
