New records of crustose seaweeds associated with subtidal maërl beds and gravel bottoms in Galicia (NW Spain)

Abstract

We studied crustose seaweeds associated with subtidal maërl beds and gravel bottoms in the Galician rías (NW Iberian Peninsula). Each species is described as well as its habitat and occurrence in maërl beds and gravel bottoms. We confirmed the great crustose species richness associated with European Atlantic maërl beds. We report a new species for the Atlantic Ocean (Contarinia peyssonneliaeformis) and six new records for the Iberian Peninsula (Atractophora hypnoides stage “Rhododiscus pulcherrimus”, Peyssonnelia immersa, Scytosiphon lomentaria stage “Microspongium gelatinosum”, Petroderma maculiforme, Pseudolithoderma roscoffense and Phycocelis foecunda). Peyssonnelia armorica is a new record for the Atlantic Iberian Peninsula and Peyssonnelia harveyana is a new record for the Galician coast. We provide for the first time observations on spermatangial structures in Cruoria cruoriaeformis occurring on the Atlantic Iberian Peninsula. The Galician crustose algal flora of subtidal maërl beds and gravel bottoms is increased up to 23 species (15 Rhodophyta and 8 Ochrophyta). Peyssonnelia rubra is excluded from the Galician flora.

First record of the genus Dudresnaya (Dumontiaceae, Rhodophyta) in New Zealand waters

“…Moreover Dudresnaya was collected from rhodolith beds in New Zealand. As found in other regions (Amado-Filho et al 2010;Pena & Bárbara 2010) research on the algal diversity associated with this fragile habitat has revealed a number of new taxa (Nelson et al 2012). Our morphological observations fit well with the original description although our samples were slightly smaller in height.…”

“…As found in other regions (Amado‐Filho et al . ; Pena & Bárbara ) research on the algal diversity associated with this fragile habitat has revealed a number of new taxa (Nelson et al . ).…”

Nuevas citas y registros corológicos para la flora bentónica marina del noroeste ibérico. New records and geographical additions for the benthic marine flora of the northwestern Iberia.

“…La colonización se produjo de Norte a Sur (Bárbara et al 2014), Desde las primeras citas de Mesophyllum expansum en el Atlántico ibérico (2010( -2012( , Peña et al 2015 se han detectado nuevas poblaciones en Galicia. Actualmente es una especie muy abundante en algunas localidades, cubriendo grandes extensiones de sustrato rocoso, así como epifita de partes apicales de Cystoseira baccata.…”

The order Corallinales <em>sensu lato</em> (Rhodophyta) in the Iberian Atlantic: current state of knowledge

“…En Galicia, diversos trabajos han ampliado esta información (Peña & Bárbara, 2004, 2008aCarro & al., 2014;Pardo & al., 2014a, b;, así como detectado nuevas especies formadoras de maërl, como por ejemplo Mesophyllum sphaericum o Phymatolithon lusitanicum . Otros trabajos, en cambio, han estado enfocados hacia la distribución, ecología y conservación de este hábitat en el Atlántico ibérico (Peña & Bárbara, 2006, 2008a, b, 2009, 2010aPeña, 2010).…”