@article {960846, title = {A molecular and morphological re-examination of the generic limits of truffles in the tarzetta-geopyxis lineage - Densocarapa, Hydnocystis and Paurocotylis}, journal = {Fungal Biology}, year = {2017}, pages = {1-21}, abstract = {

Truffle species within the /tarzetta-geopyxis lineage share smooth, globose, hyaline spores, but differ in the amount of convolution of hymenia in ascomata. The relation- ships among truffle species in this lineage have historically been confused. Phylogenetic analyses of the ITS and 28S nuclear ribosomal DNA from recently collected members of the /tarzetta-geopyxis lineage from Asia, Austral Asia, North America, and South America prompted a reinvestigation of species and generic limits in the truffle genera\ Hydnocystis, Paurocotylis, and\ Stephensia. Our analyses support emendations of\ Hydnocystis\ and\ Pauro- cotylis, abandonment of\ Stephensia\ and the resurrection of the genus\ Densocarpa. Nomen- clatural changes include the transfer of\ Stephensia bombycina\ to\ Hydnocystis, the transfer of\ Hydnocystis singeri\ and\ Stephensia bynumii\ to\ Paurocotylis, the reinstatement of\ Denso- carpa\ for\ Stephensia shanori\ and transfer of\ Stephensia crocea\ to\ Densocarpa. This is the first detection of the genus\ Paurocotylis\ in the Americas. We describe three new species,\ Hyd- nocystis transitoria\ from North America,\ Paurocotylis patagonica\ from South America, andPaurocotylis watlingii\ from Australia. Our work highlights the unexplored diversity, mor- phological plasticity, and remaining taxonomic problems among truffles in the /tarzetta- geopyxis lineage.

}, author = {Kumar, Leticia M. and Matthew E. Smith and Nouhra, Eduardo R. and Orihara, Takamichi and Sandoval LEiva, Pablo and Donald H. Pfister and McLaughlin, David J. and Trappe, James M. and Rosanne A. Healy} }