Topic
Graphidaceae
About: Graphidaceae is a research topic. Over the lifetime, 228 publications have been published within this topic receiving 3243 citations.
Papers published on a yearly basis
Papers
TL;DR: The results indicate that Graphidaceae and Thelotremataceae cannot be separated, but form several lineages within one strongly supported monophyletic lineage.
Abstract: Family concepts in lichen-forming fungi are poorly understood and were traditionally based on easily observable characters. An example is the family Thelotremataceae, a species-rich group ofcrustose, predominantly tropical lichens with over 1,000 described species. Its distinction from Graphidaceae is largely based on ascoma shape (round vs. lirelliform). Previous studies already indicated that the distinction of these families is doubtful. However, these studies only included a few taxa of Thelotremataceae. Hence we obtained 96 new partial sequences of nuclear and mitochondrial ribosomal DNA, mostly of Thelotremataceae. We performed maximum parsimony and Bayesian phylogenetic analyses of a combined dataset of 105 samples, representing 97 species. Our results indicate that Graphidaceae and Thelotremataceae cannot be separated, but form several lineages within one strongly supported monophyletic lineage. Monophyly of Graphidaceae and Thelotremataceae each in their present circumscription was rejected significantly using two independent alternative topology tests. Consequently, Thelotremataceae is reduced to synonymy with Graphidaceae. Further, numerous genera in Graphidaceae and Thelotremataceae were found to be para- or polyphyletic, including all genera currently placed in Thelotremataceae, with the sole exception of Diploschistes. In Graphidaceae, Graphis and Sarcographa are polyphyletic as currently circumscribed. However, since the topology within Graphidaceae s.1. largely lacks support and given the large number of species not yet studied, a thorough evaluation of the generic concept requires a larger dataset, including additional genes and taxa.
130 citations
1 Jan 2002
124 citations
23 Apr 2013
TL;DR: A comprehensive molecular phylogeny of the lichen family Graphidaceae (subfamilies Graphidoideae and Fissurinoideae) based on partial sequences of the mtSSU, nuLSU rDNA, and RPB2 loci confirms that rounded and lirellate ascomata evolved multiple times in unrelated clades within the family.
Abstract: We present a comprehensive molecular phylogeny of the lichen family Graphidaceae (subfamilies Graphidoideae and Fissurinoideae) based on partial sequences of the mtSSU, nuLSU rDNA, and RPB2 loci. The phylogeny includes all currently available sequences in Genbank plus 897 newly generated sequences, from a total of 908 ingroup OTUs representing 428 species. The phylogeny supports the synomymy of Graphidaceae and Thelotremataceae and confirms that rounded and lirellate ascomata evolved multiple times in unrelated clades within the family. The phylogenetic distinctiveness of Fissurinoideae versus Copyright Eimy Rivas Plata et al. This is an open access article distributed under the terms of the Creative Commons Attribution License 3.0 (CC-BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. MycoKeys 6: 55–94 (2013) doi: 10.3897/mycokeys.6.3482 www.pensoft.net/journals/mycokeys A peer-reviewed open-access journal
95 citations
3 May 2006
90 citations
TL;DR: Contrary to previous views, the most important character complex characterizing potentially natural groups in the genus Graphis is lirellae morphology, whereas labia striation, excipulum carbonization, ascospore features, and secondary chemistry, vary greatly even in closely related species.
Abstract: The species-level taxonomy of the genus Graphis sensu Staiger was revised using numerical taxonomy and cladistic techniques. In its current circumscription, Graphis includes more than 300 species and is characterized by lirellae with well-developed, carbonized labia usually concealing the disc and usually hyaline, I+ blue-violet, transversely septate to muriform ascospores. The study analyzed the importance of morphological, anatomical, and chemical characters for taxonomic purposes in the genus, both at species level and at the level of species groups and lineages. A phenotype-based cladistic analysis, combined with a novel method to estimate the degree of character state homoplasies prior to a cladogram, as well as a species ordination using non-metric multidimensional scaling (NMS), was performed to assess the delimitation of potentially natural groups within the genus. Contrary to previous views, the most important character complex characterizing potentially natural groups in the genus Graphis is lirellae morphology, whereas labia striation, excipulum carbonization, ascospore features, and secondary chemistry, vary greatly even in closely related species. Based on these findings, Wirth and Hale's concept of ‘sporomorphs’ is emended to generally characterize morphologically similar species that differ in a single character, such as labia striation (‘labiomorph’), excipulum carbonization (‘excipulomorph’), hymenium inspersion (‘inspersomorph’), ascospore size and septation (‘sporomorph’) and secondary chemistry (‘chemomorph’).
79 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 6 |
| 2019 | 7 |
| 2018 | 8 |
| 2017 | 9 |
| 2016 | 13 |