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| Wolseley, P.A.; Hawksworth, D.L.. |
| Lichens are fungi with a specialized nutritional mode involving algae, or cyanobacteria, or both. Classification is based on the fungal partner, and around 13 500 species are known. The association is ancient, and the first ascomycete fungi with fruit bodies may have been lichenized. Adaptations to tropical habitats include extensive utilization of trentepohlioid algae, the production of large multi-celled spores capable of forming numerous germ tubes, and water-repellant hydophobins coating internal cell walls. Many tropical groups lack modern monographs and numerous new species are discovered in detailed studies. Lichens merit more attention in the tropics as bioindicators of habitat disturbance. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Algae; Ascomycota; Bioindication; Coevolution; Symbiosis. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/525176 |
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| Boluda, C.G.; Rico, V.J.; Divakar, P.K.; Nadyeina, O.; Myllys, L.; McMullin, R.T.; Zamora, J.C.; Scheidegger, C.; Hawksworth, D.L.. |
| In many lichen-forming fungi, molecular phylogenetic analyses lead to the discovery of cryptic species within traditional morphospecies. However, in some cases, molecular sequence data also questions the separation of phenotypically characterised species. Here we apply an integrative taxonomy approach ‒ including morphological, chemical, molecular, and distributional characters ‒ to re-assess species boundaries in a traditionally speciose group of hair lichens, Bryoria sect. Implexae. We sampled multilocus sequence and microsatellite data from 142 specimens from a broad intercontinental distribution. Molecular data included DNA sequences of the standard fungal markers ITS, IGS, GAPDH, two newly tested loci (FRBi15 and FRBi16), and SSR frequencies from 18... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Chemotypes; Cryptic species; Haplotypes; Incomplete lineage sorting; Integrative taxonomy; Microsatellites; Speciation; Species concepts. |
| Ano: 2019 |
URL: http://www.repository.naturalis.nl/record/660277 |
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| Hawksworth, D.L.. |
| The new genus Farrowia D. Hawksw. is described to accommodate Chaetomium longicolleum Krzem. & Badura and C. longirostre (Farrow) L. Ames, species formerly incorrectly referred to Chaetoceratostoma Turc. & Maffei. These two species are united under the name F. longicollea (Krzem. & Badura) D. Hawksw. comb, nov., the type species of Farrowia. The genus is also considered to include two further species, F. malaysiensis D. Hawksw. sp. nov. and F. seminuda (L. Ames) D. Hawksw. comb. nov. (syn. Chaetomium seminudum L. Ames). The separation of the genus from Chaetomium Kunze ex Fr. and Scopinella Lév. is discussed and conidial states reported in the family Chaetomiaceae Wint. reviewed. A key to the species of the Chaetomiaceae with... |
| Tipo: Article / Letter to the editor |
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| Ano: 1975 |
URL: http://www.repository.naturalis.nl/record/531758 |
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| Hawksworth, D.L.. |
| A revision of the genus Lichenoconium Petr. & Syd. (Sphaeropsidales) is presented. Ten species are accepted including L. echinosporum D. Hawksw., L. erodens M.S. Christ. & D. Hawksw. and L. parasiticum D. Hawksw. sp. nov. and L. cargillianum (Linds.) D. Hawksw. and L. usneae (Anzi) D. Hawksw. combs. nov. All species apart from L. boreale (Karst.) Petr. & Syd. are exclusively lichenicolous and species of the genus certainly occur on 58 host lichens (with unconfirmed reports for a further 11). Up to three Lichenoconium species can occur on a single host but when this arises different symptoms often result. Descriptions of the accepted species and details of the reactions of various hosts to them are presented; a key and table summarising their... |
| Tipo: Article / Letter to the editor |
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| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/532269 |
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