Phylogenetic revision of the lichenized family Gomphillaceae (Ascomycota: Graphidales) suggests post-K–Pg boundary diversification and phylogenetic signal in asexual reproductive structures
- Author:
- Xavier-Leite A.B., Cáceres M.E.S., Aptroot A., Moncada B., Lücking R. & Goto B.T.
- Year:
- 2022
- Journal:
- Molecular Phylogenetics and Evolution
- Pages:
- 168: 107380 [23 p.]
- Url:
- https://doi.org/10.1016/j.ympev.2021.107380
We present the first broad molecular-phylogenetic revision of the lichenized family Gomphillaceae, based on 408
newly generated sequences of the mitochondrial SSU rDNA and nuclear LSU rDNA, representing 342 OTUs. The
phylogenetic analysis of 20 out of the 28 currently accepted genera resulted in 48 clades. Twelve genera were
resolved as monophyletic: Actinoplaca, Arthotheliopsis, Bullatina, Caleniopsis, Corticifraga, Gomphillus, Gyalectidium, Gyalidea, Jamesiella, Rolueckia, Rubrotricha, and Taitaia. Two genera resulted paraphyletic, namely
Aulaxina (including Caleniopsis) and Asterothyrium (including Linhartia). Six genera were in part highly polyphyletic: Aderkomyces, Calenia, Echinoplaca, Gyalideopsis, Psorotheciopsis, and Tricharia. While ascoma
morphology and anatomy has traditionally been considered as main character complex to distinguish genera, our
study supported the notion that the characteristic asexual anamorph of Gomphillaceae, the so-called hyphophores, are diagnostic for most of the newly recognized clades. As a result, we recognize 26 new genus-level
clades, three of which have names available (Microxyphiomyces, Psathyromyces, Spinomyces) and 23 that will
require formal description as new genera. We also tested monophyly for 53 species-level names for which two or
more specimens were sequenced: 27 were supported as monophyletic and representing a single species, 13 as
monophyletic but with an internal topology suggesting cryptic speciation, four as paraphyletic, and nine as
polyphyletic. These data suggest that species richness in the family is higher than indicated by the number of
accepted names (currently 425); they also confirm that recently refined species concepts reflect species richness
better than the broad concepts applied in Santesson’s monograph. A divergence time analysis revealed that
foliicolous Gomphillaceae diversified after the K–Pg-boundary and largely during the Miocene, a notion supported by limited data available for other common foliicolous lineages such as Chroodiscus (Graphidaceae),
Pilocarpaceae, and Porinaceae. This contradicts recent studies suggesting that only macrofoliose Lecanoromycetes exhibit increased diversification rates in the Cenozoic.
Keywords: Cretaceous; Foliicolous lichens; Jurassic; Mesozoic; Wet tropical forests.
- Id:
- 34296
- Submitter:
- zdenek
- Post_time:
- Sunday, 10 April 2022 01:44