A Study On Delimetation Of Umbilicariales Group Based On Comprehensive Data

Umbilicariales is classified into Lecanoromycetes,under Ascomycota. It contains four families:Umbilicariaceae Chevall., Ophioparmaceae R.W.Rogers & Hafellner, Fuscideaceae Hafellner, Elixiaceae Lumbsch.Five hundred and forty-seven specimens of lichens were collected from 10 regions belonging to 6 provinces in China during the research. The studies of Umbilicariales from China are performed using the methods of morphology anatomy on the basis of identification. All the specimens examined by the author are deposited in the following herbaria:HMAS-L,HKAS,and SDNU.The phylogenetic position of the lichen families are investigated using molecular and morphological data. Nucleotide sequences of the nuclear SSU rDNA and ITS region were obtained in this study and aligned to those of other lichenized and non-lichenized fungal species from GenBank. The result indicates that the Fuscideaceae cannot be form a good group with Teloschistales so it's cannot be included in the order Teloschistales was logical. And it's more related with Umbilicariales. Ascus type Is the important basis for classification of lichens. we found umbilicaria-type lichen fundamental construction of the tholus is the same. Presence of an amyloid ascus with a tholus exhibiting a strongly amyloid dome tholus. But Fuscideaceae is diffrent it is with an inner and an outer heavily amyloid zone, and a less amyloid zone in between. It's different from others. Based on molecular and morphological data, The result indicates that the Fuscideaceae will be include in the order Umbilicariales maybe more data to support.This study first reported the order umbilicariales which contains four families' molecular data and anatomical features. It's provide strong evidence for the purpose of umbilicariales' system position defined theoretical basis.