Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.3/3324
Título: Rhodolith forming coralline algae in the Upper Miocene of Santa Maria Island (Azores, NE Atlantic) : a critical evaluation
Autor: Rebelo, Ana C.
Rasser, Michael
Riosmena-Rodríguez, Rafael
Neto, Ana I.
Ávila, Sérgio P.
Palavras-chave: Fossil algae
Oceanic Islands
Rhodoliths
Corallinales (Rhodophyta)
Data: Dez-2014
Editora: Magnolia Press
Citação: Rebelo AC, Rasser MW, Riosmena-Rodríguez R, Neto AI & Ávila SP (2014). "Rhodolith forming coralline algae in the Upper Miocene of Santa Maria Island (Azores, NE Atlantic): a critical evaluation". Phytotaxa, 190(1): 370-381.
Resumo: The Late Miocene Malbusca outcrop is located in the southeastern coast of Santa Maria Island (Azores, NE Atlantic), interspersed in volcanic formations. At ~20 meters above present sea level, a prominent discontinuous layer of rhodoliths seizes with an extension of ~250 meters. This paper presents the first taxonomic record of fossil rhodolith forming coralline algae for the Miocene of the Azores. The preserved taxonomic features used were the following: (1) arrangement of basal filaments, (2) epithallial cells (when observable), (3) presence of cell fusions, (4) conceptacle type, (5) number of cells layers which conceptacle chamber floors are situated below the surrounding thallus surface and (6) for the sporangial pores, the orientation of the filaments around the conceptacle pores. Based on these characters, six taxa were identified encompassing three Corallinaceae (Lithophyllum prototypum, Lithophyllum sp., Spongites sp., Hydrolithon sp.) and one Hapalidaceae (Phymatolithon calcareum and cf. Phymatolithon sp.). An unidentified coaxial thallus was also present, the coaxial construction ascribing the specimens to the genus Mesophyllum or Neogoniolithon. Taxonomic accounts for the identified taxa are described, illustrated and an identification key is provided. The report of L prototypum represents the first Miocene record and the preservation of the specimens is very good. Miocene coralline algae seem very consistent among deposits but some species are relevant for particular areas, like in the Azores.
Peer review: yes
URI: http://hdl.handle.net/10400.3/3324
DOI: 10.11646/phytotaxa.190.1.22
ISSN: 1179-3155 (Print)
1179-3163 (Online)
Versão do Editor: http://dx.doi.org/10.11646/phytotaxa.190.1.22
Aparece nas colecções:DBIO - Artigos em Revistas Internacionais / Articles in International Journals

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