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Sphaerocarpos muccilloi (Sphaerocarpaceae, Marchantiophyta) was described in 1981, being an endemic species and the only species of the family to Brazil. This species is considered as Critically Endangered (CR) according to “Red List of threatened species of the Rio Grande do Sul state”. Sphaerocarpos muccilloi was recorded in three places only in Rio Grande do Sul: Porto Alegre, São Leopoldo and Ivoti (collected from 1963 to 1977). These sites are highly anthropized and the last records being from more than 40 years. After a revision of herbarium specimens and several field trips we recollected S. muccilloi in the Pampa Biome, in Santana do Livramento municipality, at the Ibirapuitã Environmental Protection Area (APA do Ibaratuitã), Mata and Santa Vitória do Palmar municipalities. Another species (S. texanus), not reported to Brazil, was reported now to Paraná state. These new records provide important information about occurrence and distribution of the family to Brazil. Regarding to S. muccilloi, these new records show that the range of occurrence is wider than previous reported. This new data will help the next revision of the Red List of Threatened Species of Rio Grande do Sul and Brazil and will subsidize conservation strategies.

rodriguésia

Sphaerocarpos muccilloi (Sphaerocarpaceae, Marchantiophyta), a critically endangered species recollected in Rio Grande do Sul, Brazil, and Sphaerocarpos texanus, a new record to Brazil