Fissidens inaequalis Mitt., J. Linn. Soc., Bot.

Gomes do Nascimento, Géssica Maria, Mendes da Conceição, Gonçalo, Fernandes Peralta, Denilson & Oliveira, Hermeson Cassiano de, 2019, Bryophytes of Serra da Capivara National Park, Piauí, Brazil, Check List 15 (5), pp. 833-845 : 840

Fissidens inaequalis Mitt., J. Linn. Soc., Bot. 12: 569.

1869.

Materials examined. Table 1. Fig. 17.

Identification. Recognized by the reduced size of the gametophytes; leaves with dimorphic cells; large, guttu- late, clear, rhomboidal-hexagonal lamina cells; reduced and isodiametric marginal cells forming a margin with 1–3 rows of differentiated cells; limbidium absent. It dif- fers from Fissidens ornatus Herzog because this species has a serrated margin, never smooth or crenulate and an acute apex. Habitat: rupicolous and terricolous.

Brazilian range. AM, BA, GO, MA, MG, MT, PB, PE, RJ, RO, RR, SE, SP.

Fissidens leptophyllus Mont., Ann. Sci. Nat., Bot. 2 14: 344. 1840.

Materials examined. Table 1. Fig. 18.

Identification. Recognized by oblong-ovoid leaves with very acute apex; costa up to 2–4 cells below the apex; unipapillose cells; limbidium in vaginate lamina of all leaves. Easily confused with F. submarginatus Bruch , but this species has oblong leaves and the limbidium occupies the full extent of the vagnate lamina. Habitat: rupicolous, terricolous and termitocolous.

Brazilian range. AC, AM, BA, GO, MA, MG, SP. New record for Caatinga.

Fissidens palmatus Hedw., Sp. Musc. Frond. 154. 1801.

Materials examined. Table 1

Identification. Diagnosed by non-sinuous walls of the cells of the leaves lamina and differentiated cells in the mid-region.

Brazilian range. AC, BA, CE, GO, MA, PB, PE, SP. New record for Caatinga.

Fissidens perfalcatus Broth., Bih. Kongl. Svenska Vetensk. -Akad. Handl. 26, Afd. 3(7): 13. 1900.

Materials examined. Table 1. Fig. 19.

Identification. Characterized by oblong-ovoid leaves with vaginate lamina that covers the entire stem and usually surpasses it; limbidium occupying the entire extension or until the vaginate lamina of all the leaves; unipapillose cells. It differs from F. submarginatus Bruch , which has oblong-lanceolate leaves; vaginate lamina covering part of the stem, never surpassing it; limbidium occupying the full extent of the vaginate lamina. Habitat: rupicolous, terricolous and termitocolous.

Brazilian range. BA, ES, GO, MT, PB, PE, TO. New record for Caatinga.