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Six new epibiotic Proschkinia (Bacillariophyta) species and new insights into the genus phylogeny
Majewska, R.; Bosak, S.; Frankovich, T.A.; Ashworth, M.P.; Sullivan, M.J.; Robinson, N.J.; Lazo-Wasem, E.A.; Pinou, T.; Nel, R.; Manning, S.R.; Van de Vijver, B. (2019). Six new epibiotic Proschkinia (Bacillariophyta) species and new insights into the genus phylogeny. Eur. J. Phycol. 54(4): 609-631. https://dx.doi.org/10.1080/09670262.2019.1628307
In: European Journal of Phycology. Cambridge University Press/Taylor & Francis: Cambridge. ISSN 0967-0262; e-ISSN 1469-4433, more
Peer reviewed article  
Available in  Authors 
Keywords
    Bacillariophyceae [WoRMS]
    Marine/Coastal
Author keywords
    Barnacle; epiphyte; epizoic; marine diatom; museum specimen; seagrass;sea turtle
Authors  Top 
  • Majewska, R.
  • Bosak, S.
  • Frankovich, T.A.
  • Ashworth, M.P.
  • Sullivan, M.J.
  • Robinson, N.J.
  • Lazo-Wasem, E.A.
  • Pinou, T.
  • Nel, R.
  • Manning, S.R.
  • Van de Vijver, B., more
Abstract
    The diatom genus Proschkinia is a common element of biofilms covering diverse substrata in saline inland or shallow coastal environments. It can be distinguished from other naviculoid taxa by its lanceolate valves with a fistula located within the central area and numerous open girdle bands with a U-shaped cross-section and a single row of perforations on the internal side of the fold. Despite this distinct morphology, frustules of Proschkinia are typically weakly silicified and often overlooked when cleaned diatom material is analysed. The current paper describes six new species of Proschkinia: P. browderiana sp. nov., P. lacrimula sp. nov., P. maluszekiana sp. nov., P. sulcata sp. nov., P. torquata sp. nov. and P. vergostriata sp. nov., found in numerous samples of marine organisms, such as sea turtles (including sea turtle museum specimens), sea turtle-associated barnacles and seagrass from across the three oceans. Some of the newly described taxa were found on multiple individuals belonging to different sea turtle species, whereas others were in samples collected from different continents. Molecular phylogenetic analysis indicated that examined Proschkinia strains formed a monophyletic clade, sister to Fistulifera.
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