Description of<i>Conticribra tricircularis</i>, a new genus and species of Thalassiosirales, with a discussion on its relationship to other continuous cribra species of<i>Thalassiosira</i>Cleve (Bacillariophyta) and its freshwater origin

Stachura-Suchoples, Katarzyna; Williams, David M.

doi:10.1080/09670260903225431

Cited by 50 publications

(21 citation statements)

References 19 publications

(14 reference statements)

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“…Although there are approximately 100 living Thalassiosira species, some of these are better thought of as belonging to Thalassiosira sensu lato. For example, some are characterised by valve face undulation that may not correspond to a broad concept of Thalassiosira (Julius & Tanimura 2001;, and others were recently transferred to genera such as Roundia Makarova and Takanoa Makarova (Makarova 1994) and Shionodiscus Alverson, Kang & Theriot and Conticribra Stachura-Suchoples & Williams (Alverson et al 2006;Stachura-Suchoples & Williams 2009). Nevertheless, many Thalassiosira species still have an ambiguous status, as it is difficult to recognise the problematic taxa from over 100 species.…”

Section: Introductionmentioning

confidence: 99%

Species diversity of the genusThalassiosira(Thalassiosirales, Bacillariophyta) in South Korea and its biogeographical distribution in the world

et al. 2016

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Thalassiosira species are an important component of phytoplankton populations, and most species are considered cosmopolitan. Many authors have investigated the diversity of Thalassiosira species in order to understand their ecological roles in local areas. Our regional taxonomic study revealed the presence of 44 Thalassiosira species at 124 sites in Korean coastal waters. Of these, 14 species are newly reported in Korean waters and are described in detail with external and internal valve illustrations. Some morphologically confused taxa, such as the Thalassiosira s.s. group, T. curviseriata/T. tealata, T. simonsenii/Planktoniella blanda and T. proschkinae/T. spinulata, are clearly distinguished using additional morphological criteria. In addition, the full biogeographical distribution of Thalassiosira is described and compared with the Korean species. Korean waters seem to be the 'Maginot Line' for the cold-and warm-water Thalassiosira species. Knowledge of Thalassiosira species diversity will increase with more intensive work in relatively little-studied regions, such as the Indo-Pacific and tropical Atlantic Oceans.

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Section: Introductionmentioning

confidence: 99%

Species diversity of the genusThalassiosira(Thalassiosirales, Bacillariophyta) in South Korea and its biogeographical distribution in the world

et al. 2016

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“…The fultoportula-bearing genus Conticribra Stachura-Suchoples et Williams (2009: 482) was recently established to accommodate C. tricircularis Stachura-Suchoples et Williams (2009: 479) and three species of Thalassiosira (Stachura-Suchoples & Williams 2009). The genus is characterized by the presence of loculate areolae with (semi-) continuous cribra; a non-plicate valve face; and the rimoportula located on the valve mantle, replacing a fultoportula The presence of valve face fultoportulae constitutes the distinguishing character between living Conticribra species and fossil Conticribra species.…”

Section: Introductionmentioning

confidence: 99%

“…(Stachura-Suchoples & Williams 2009). The genus Conticribra comprises four species, namely, two fossil species-C.tricircularis and C. nevadica (Khursevich et VanLandingham) Stachura-Suchoples et Williams (2009: 482; basionym: Thalassiosira nevadica Khursevich & VanLandingham 1993: 3902)-and two extant species-C. guillardii (Hasle) Stachura-Suchoples et Williams (2009: 482; basionym: Thalassiosira guillardii Hasle 1978: 274) and C. weissflogii (Grunow) Stachura-Suchoples et Williams (2009: 482; basionym: Micropodiscus weissflogii Grunow in Van Heurck 1885: 210 1 ).…”

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confidence: 99%

Description of the pseudocryptic species Conticribra weissflogiopsis sp. nov. (Thalassiosirales, Bacillariophyta) isolated from brackish waters in Korea, based on its cingulum structure and molecular analysis

Park

Lee

2014

Phytotaxa

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We describe the new fultoportulate diatom species, Conticribra weissflogiopsis, isolated from brackish waters in Korea, based on morphological characters and molecular data. The new species is characterized by having areolae venation with internal (semi-) continuous cribra, a flat valve face, a single marginal rimoportula replacing a marginal fultoportula, a subcentral ring of the valve face fultoportulae, and a dextral pattern of cingulum structure. The overall valve structure of C. weissflogiopsis resembles that of C. weissflogii; however, the cingulum structure differs between the two species—C. weissflogiopsis has a dextral offset of band opening in the cingulum, whereas C. weissflogii has a sinistral offset. Phylogenetic analysis of the nuclear small subunit ribosomal DNA (SSU rDNA) revealed that C. weissflogiopsis is located in the Conticribra clade. Further, the pairwise genetic distance based on the SSU rDNA and the internal transcribed spacer 2 (ITS2) indicated that C. weissflogiopsis is a distinct Conticribra species. On the basis of the morphology and molecular phylogeny, we expand the hypothesis regarding the morphological evolution of Conticribra species.

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“…4 F). The species was described by HASLE (1978) from a brackish water locality (Helsinki, Gulf of Finland) and was transferred to the Conticribra genus by STACHURA-SUCHOPLES and WILLIAMS (2009). Additional data were published about its morphology by MAKAROVA et al (1979), KISS et al (1984), GENKAL (1992), TRIGUEROS et al (2000).…”

Section: Introductionmentioning

confidence: 99%

Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution

Kiss

Klee²,

Éctor

et al. 2012

Acta Botanica Croatica

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Centric diatoms of 107 different Hungarian running waters were investigated. Among them the largest was the River Danube, from which more than one hundred plankton samples were analysed by scanning electron microscopy (SEM). Only one sample was analysed from creeks, which were the smallest running waters analysed in this study. There were also channels with slow currents flowing out of rivers or connecting different rivers. In total, 41 centric taxa belonging to 11 genera were found during this study. The average number of taxa found in a single watercourse was 7, the maximum 40 and the minimum 1. Cyclotella meneghiniana was the most frequently encountered species (present in 60% of sites). Twelve taxa were found in more than 20% of sites, 7 taxa between 5-10% and 6 taxa only in one site.

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Description ofConticribra tricircularis, a new genus and species of Thalassiosirales, with a discussion on its relationship to other continuous cribra species ofThalassiosiraCleve (Bacillariophyta) and its freshwater origin

Cited by 50 publications

References 19 publications

Species diversity of the genusThalassiosira(Thalassiosirales, Bacillariophyta) in South Korea and its biogeographical distribution in the world

Species diversity of the genusThalassiosira(Thalassiosirales, Bacillariophyta) in South Korea and its biogeographical distribution in the world

Description of the pseudocryptic species Conticribra weissflogiopsis sp. nov. (Thalassiosirales, Bacillariophyta) isolated from brackish waters in Korea, based on its cingulum structure and molecular analysis

Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution

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