Flavopunctelia y Punctelia (Ascomycetes liquenizados) de Nueva Galicia, México

the lichens flavopunctelia and punctelia (parmeliaceae) are characterized by the presence of pseudocyphella in the upper surface. the first one has a yellowish-green upper surface, usnic acid in the cortex and bifusiform picnidiospores. the second one has whitish-grayish to yellowish-brown upper surface, lecanoric acid in the cortex and filiform or unciform picnidiospores. 219 specimens were recollected in 102 localities from the nueva galicia region (aguascalientes, colima and jalisco, and part of durango, guanajuato, michoacán, nayarit and zacatecas). the studied specimens correspond to seven species: flavopunctelia flaventior, f. praesignis, f. soredica, punctelia hypoleucites, p. perreticulata, p. rudecta and p. subrudecta; from them, p. perreticulata is a new record to mexico; three are new reports to jalisco, three to zacatecas, two to nayarit and one to colima. a dichotomic key is presented for the species found in nueva galicia.