Two species of the genus Acinetospora (Ectocarpales, Phaeophyceae) from Japan: A. filamentosa comb. nov. and A. asiatica sp. nov.

Abstract

The brown algal genus

Taxonomic reassessment of the Indo-Pacific Scytosiphonaceae (Phaeophyceae): Hydroclathrus rapanuii sp. nov. and Chnoospora minima from Easter Island, with proposal of Dactylosiphon gen. nov. and Pseudochnoospora gen. nov.

“…Our current understanding of global algal biodiversity and the phylogenetic relationships of macroalgae has been reshaped by the advent of DNA phylogenies. Using molecular phylogenetic tools, reports of high levels of cryptic and/or pseudo-cryptic diversity are common, especially among widespread species, such as Acinetospora crinita (Carmichael) Sauvageau (Yaegashi et al 2015), Centroceras clavatum C. Agardh (Schneider et al 2015), Gibsmithia hawaiiensis Doty (Gabriel et al 2016), Lobophora variegata (J.V. Lamouroux) Womersley ex E.C.…”

New records of two filamentous brown algae, <i>Acinetospora filamentosa</i> and <i>Microspongium stilophorae</i> from Korea

“…In addition, it revealed that Acinetospora filamentosa differs from A. asiatica by 4.4-4.7% and from A. crinita by 3.0% gene sequence divergence respectively. Remarks: Acinetospora filamentosa was a new combination with Ectocarpus filamentosus as the basionym (Yaegashi et al 2015 (Fig. 3A) formed by prostrate filaments of irregular cells in shape and size (Fig.…”

“…It is characterized by having sparsely branched uniseriate filaments forming entangled tufts, scattered meristematic zones, crampons, plurilocular sporangia (acinetosporangia), and monosporangia (Bornet 1892;Sauvageau 1899). Currently, four Acinetospora species are recognized from worldwide: A. crinita (Carmichael in Harvey) Sauvageau from Scotland (Womersley 1987), A. nicholsoniae Hollenberg from California, U.S.A. (Hollenberg 1971), A. filamentosa (Noda) Yaegashi from Japan (Noda 1970;Yaegashi et al 2015), and A. asiatica Yaegashi, Yamagishi et Kogame from Japan (Yaegashi et al 2015). Of them, A. crinita and A. asiatica have been reported in Korea (Kim 2010;Oteng'o et al 2018).…”

Benthic Marine Algae on Japanese Tsunami Marine Debris – a morphological documentation of the species. Part 2 – The brown algae

“…• Similar species: Acinetospora filamentosa (Noda) Yaegashi et al (2015, fig. 2), a species originally described with ellipsoidal (not globose) unangia (Noda, 1970(Noda, , fig.…”