Diversity of thalloid liverworts in Brazilian Savanna of Parque Nacional da Chapada das Mesas, Maranhão, Brazil Author Fernandes, Rozijane Santos Author Silva, José Augusto dos Santos Author Ottoni, Felipe Polivanov Author Pinheiro Costa, Denise text Check List 2021 2021-01-07 17 1 45 58 http://dx.doi.org/10.15560/17.1.45 journal article 10.15560/17.1.45 1809-127X Monoclea gottschei Lindb. Figure 5A–D Material examined. BRAZIL Maranhão • Carolina, Complexo Pedra Caída , cachoeira do Santuário ; 07°02′ 44″S , 047°27′01″W ; alt. 128 m ; 07 Feb. 2020 ; J . A . S Silva 552 col.; CCAA 2578 . • ibid., J . A . S Silva 557 col.; CCAA 2697 . Identification. Plants rupicolous. Thallus dark green, 20– 30 × 5–10 mm wide, dichotomous, without central midrib, homogeneous; dorsal surface with chlorophyllose cells and without epidermal pores, densely spotted by whitish or darkish dots (observed in fresh material); air chambers absent; ventral surface with chlorophyllose cells; margins usually crispate-undulate. Sporophyte not seen. Monoclea gottschei is a large plant, 2–3 cm long, with crispate-undulate margins. This species is sometimes misidentified as Dumortiera hirsuta (Sw.) Nees because it has a green, flattened thallus, without pores and air chambers, and often occurs in the same habitat. Otherwise, M. gottschei differs from D. hirsuta by having whitish dots on the thallus in fresh material and no ventral bundle of the rhizoid ( Gradstein et al. 2001 ). Distribution and ecology. Neotropical ( Gradstein and Costa 2003 ; Gradstein 2017 ; Flora do Brasil 2020 ; GBIF. org 2020). Brazilian biomes and states: Amazonia (Amazonas), Atlantic Forest ( Espírito Santo , Minas Gerais , Paraná , Pernambuco , Rio de Janeiro , and São Paulo ), and Pampas ( Rio Grande do Sul ) ( Gradstein and Costa 2003 ; Flora do Brasil 2020 ); and Cerrado ( Maranhão ; new data). We collected this species on shaded rocks near a waterfall.