Abstract: Multilocus phylogenetic studies revealed a high level of cryptic diversity within the lichen-forming fungal genus Maronina (Protoparmelioideae, Parmeliaceae). Coalescent-based species delimitation suggested that most of the cryptic molecular lineages warranted recognition as separate species. Here we study the morphology and chemistry of these taxa and formally describe eight new species based on phenotypical and molecular characters. Further, we evaluate the use of ITS rDNA as a DNA barcode for identifying species in this genus. For the first time, we obtained an ITS sequence of Maronina australiensis, the type species of the genus and showed that it is phylogenetically not closely related to species currently placed in Maronina or Protoparmelia. We assembled a dataset of 66 ITS sequences to assess the interspecies genetic distances amongst the twelve Maronina species using ITS as DNA barcode. We found that Maronina and Protoparmelia form a supported monophyletic group whereas M. australiensis is sister to both. We therefore propose a new genus Neoprotoparmelia to accommodate the tropical-subtropical species within Protoparmelioideae, with Neoprotoparmelia corallifera as the type, N. amerisidiata, N. australisidiata, N. brasilisidiata, N. capensis, N. crassa, N. pauli, N. plurisporibadia and N. siamisidiata as new species and N. capitata, N. isidiata, N. multifera, N. orientalis and N. pulchra as new proposed combinations. We provide a key to Neoprotoparmelia and confirm the use of ITS for accurately identifying species in this group.
Notes: New: Neoprotoparmelia Garima Singh, Lumbsch & I.Schmitt (type N. corallifera), N. amerisidiata Garima Singh & Aptroot (from U.S.A.), N. australisidiata Garima Singh & Aptroot (from Australia), N. brasilisidiata Garima Singh, M.Cáceres & Aptroot (from Brazil, Costa Rica, El Salvador), N capensis V.J.Rico, A.Crespo & Garima Singh (from South Africa), N. capitata (Lendemer) Garima Singh, Lumbsch & I.Schmitt (≡ P. capitata Lendemer), N. corallifera (Kantvilas & Papong) Garima Singh, Lumbsch & I.Schmitt (≡ Maronina orientalis var. corallifera Kantvilas & Papong), N. crassa Garima Singh & Aptroot (from Australia), N. isidiata (Diederich, Aptroot & Sérus.) Garima Singh, Lumbsch & I.Schmitt (≡ P. isidiata Diederich, Aptroot & Sérus.), N. multifera (Nyl.) Garima Singh, Lumbsch & I.Schmitt (≡ Lecanora multifera Nyl.), N. orientalis (Kantvilas & Papong) Garima Singh, Lumbsch & I.Schmitt (≡ Maronina orientalis Kantvilas & Papong), N. pauli V.J.Rico, Lumbsch & Garima Singh (from Kenya), N. plurisporibadia Garima Singh, M.Cáceres & Aptroot (from Brazil), N. pulchra (Diederich, Aptroot & Sérus.) Garima Singh, Lumbsch & I.Schmitt (≡ P. pulchra Diederich, Aptroot & Sérus.), N. siamisidiata Garima Singh & Aptroot (from Thailand).
URL: 10.3897/mycokeys.44.29904
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Current date: 2024.04.24.OK