Aspectos taxonômicos de três espécies de CORALINÁCEAS não geniculadas do litoral do estado da Bahia, Brasil

Abstract

RESUMO As algas calcárias não articuladas, representadas pela ordem Corallinales são amplamente distribuídas pelos oceanos, ocorrem desde a zona das marés até regiões profundas e apresentam extrema importância ecológica e econômica. Apesar destes aspectos, as algas calcárias não articuladas ainda são pouco conhecidas no Brasil. Com o intuito de contribuir para o conhecimento taxonômico desse grupo, neste trabalho são apresentadas descrições de três espécies algas de calcárias não articuladas encontradas no litoral do estado da Bahia: Sporolithon episporum, Mesophyllum erubescens e Lithophyllum stictaeforme.

New records of rhodolith-forming species (Corallinales, Rhodophyta) from deep water in Espírito Santo State, Brazil

“…Based on the published literature, until now, 28 species of non-geniculate coralline red algae from Brazilian waters have been reported (Taylor 1960;Figueiredo and Steneck 2002;Figueiredo 2005, 2007;Villas-Boas and Figueiredo 2005;Rocha et al 2006;Nunes et al 2008;Villas-Boas et al 2009;Farias et al 2010;Amado-Filho et al 2010;Bahia et al 2011). This study presents two new records for Brazil, increasing the number to 30 species.…”

Nongeniculate coralline red algae (Rhodophyta: Corallinales) in coral reefs from Northeastern Brazil and a description of Neogoniolithon atlanticum sp. nov.

“…The herein described specimens show close similarities with those reported previously for the species at the same study site (Figueiredo & Steneck 2002, Tâmega & Figueiredo 2007 and in the Caribbean (Steneck & Adey 1976). The vegetative and reproductive features of L. stictaeforme identified in this study were compared to samples of (1) L. congestum from previous studies carried out in Abrolhos (Figueiredo & Steneck 2002) and descriptions of samples from the Caribbean (Taylor 1960, Steneck & Adey 1976, Littler & Littler 2000, to (2) L. stictaeforme from the Brazilian reefs at Cumuruxatiba (Nunes et al 2008) and from rhodolith beds (Villas Bôas et al 2009), to (3) Lithophyllum kotschyanum Unger from Hawaii (Adey et al 1982) and the Sulawesi Islands (Verheij 1994) and to (4) Lithophyllum tamiense (Heydrich 1897: 1) Verheij (1994 from Australia (Ringeltube & Harvey 2000) ( Table 1). The comparison showed similarities in the vegetative organisation of the thallus, the epithallial and perithallial cells and the reproductive structures (shape, size and number of cells on the roof of the tetrasporangial conceptacles; Table 1).…”

“…In fact, L. kotschyanum in the Pacific Ocean is considered to be L. congestum in the Atlantic Ocean, occupying the same habitats as this species in shallow waters (Adey et al 1982). Similarly, L. stictaeforme in coastal reefs occupies the same habitats as L. congestum in the Abrolhos reefs in Brazil (Nunes et al 2008). The information on the type material of L. congestum shows that both have the same conceptacle anatomy and sizes as similar to L. kotschyanum and L. stictaeforme (Table 1), however the type samples of L. kotschyanum have incomplete conceptacles, which makes this older name unusable.…”

“…In tropical and subtropical regions of the Atlantic, a few studies have described these algae, such as Steneck & Adey (1976), Littler & Littler (2000), Figueiredo & Steneck (2002), Tâmega & Figueiredo (2005, 2007, Nunes et al (2008) and Villas Bôas et al (2009). Two species are commonly described in Brazilian coral reef habitats: Lithophyllum congestum (Foslie 1898: 13) Foslie (1900: 20) and Porolithon pachydermum (Foslie 1904: 4) Foslie (1909: 57) neither species has been studied in a modern context based on the detailed anatomical analysis of the type with respect to modern collections.…”

Three deep water species of Sporolithon (Sporolithales, Rhodophyta) from the Brazilian continental shelf, with the description of Sporolithon elevatum sp. nov.

“…She reported eight species for this genus but only a few of them have been confirmed in the literature (Wynne 1986). Recently, Amado-Filho et al (2007) stated that Sporolithon is one of the dominant genera in Espírito Santo state and Nunes et al (2008) reported Sporolithon episporum (M.A.Howe) E.Y. Dawson (1960: 40) as a new record on the northeastern coast of Brazil.…”