215
In spite of the name, referring to Rhizophora mangle, where the first specimens were
found, this species can be found also in rocks.
Pyxine endolutea is morphologically similar, differing in the convex laciniae and the
marginal to laminal and more abundant maculae.
Pyxine primaria has plane to convex laciniae, maculae mainly laminal and the medulla
cream K+ faint reddish or negative.
Until the moment, P. rhizophorae was found only in littoral zone.
SPECIMENS EXAMINED. Brazil, São Paulo State, Municipality of Bertioga, in small island in
front of the Prainha Branca beach, 23°52ʹ18ʹʹS, 46°08ʹ05ʹʹW, 15 m alt., in tree between rocks,
21-VIII-1979, leg. M.P. Marcelli 16423 (SP); idem, Municipality of Cananéia, next to the
rafts, in the continent side, 24°59ʹS, 47°52ʹW, 5 m alt., tree in mangrove, 18-XII-1979, leg.
M.P. Marcelli 18209 (SP), idem, Municipality of Iguape, Barra do Ribeira, between Suamirin
River and the ocean, on mangrove, 24°42ʹS, 47°33ʹW, 1 m alt., corticolous in the shadow, 18-
VII-1989, leg. M.P. Marcelli 6676 (SP); idem, on restinga Forest after dune, 24°42ʹS,
47°33ʹW, 1 m alt., on branch, 19-VII-1989, leg. M.P. Marcelli 6807, 6841 (SP); idem,
vegetation in dune next to the river mouth, 24°42ʹS, 47°33ʹW, 1 m alt., corticolous in branch,
21-VII-1989, leg. M.P. Marcelli 6934 (SP); idem, Itanhaém Municipality, Bairro Cibratel,
Itanhaém Beach, in street with palms and Terminalia sp. perpendicular to the beach, 24°11ʹS,
46°47ʹW, 1 m alt., corticolous in direct sun, 10-I-1989, leg. M.P. Marcelli 4122 (SP); idem,
Municipality of Mongaguá, hills from the Serra do Mar next to the city, 24°05ʹS, 46°47ʹW,
100 m alt., corticolous, 11-VIII-1980, leg. M.P. Marcelli 16032 (SP); idem, Municipality of
Peruíbe, Guaraú River margin, next to the mouth, 24°19ʹS, 47°59ʹW, 1 m. alt., on palm, 19-V-
1990, leg. M.P. Marcelli 8558 (SP); idem, Reserva Ecológica Juréia-Itatins, Núcleo
Guarauzinho, next to the entrance to the Núcleo Guarauzinho, 24°19ʹS, 47°59ʹW, 5 m. alt.,
saxicolous, 26-07-1993, leg. M.P. Marcelli 23684, 23688; idem, corticicolous, 26-VII-1993,
leg. M.P. Marcelli 23693, 23694 (SP); idem, Reserva Ecológica Juréia-Itatins, Núcleo
Guarauzinho, Arpoador Beach, 24°19ʹS, 47°59ʹW, 1 m. alt., rocks and trees on the south face
and Center of the beach, saxicolous, 27-VII-1993, leg. M.P. Marcelli 23078, 23717 (SP);
idem, on rocks in the North side, with herbs, bromeliads and Cladonia, saxicolous, 29-VII-
1993, leg. M.P. Marcelli 23777 (SP); idem, Ubatuba Municipality, Parque Estadual da Serra
do Mar, Núcleo Picinguaba, Praia da Fazenda, 23º21‘25‖ S, 44º51‘55‖ W; 1 m alt., rocks on
the Praia da Fazenda, 18-III-2006, leg. P. Jungbluth & M.F.N. Martins 1243 (SP); idem, Praia
da Fazenda, 23º21‘41‖ S, 44º50‘53‖ W, 1 m alt., on tree in the border of restinga Forest, in
front of the sea, 18-III-2006, leg. P. Jungbluth, & M.F.N. Martins 1268 (SP);idem, Praia da