“Rediscovery” of Encyonema ratpanati sp. nov. (Bacillariophyta, Cymbellaceae) in Victoria Falls, Namibia

  1. Adrián Llamazares 1
  2. Eloy Bécares 1
  3. Saúl Blanco 1
  1. 1 Universidad de León
    info

    Universidad de León

    León, España

    ROR https://ror.org/02tzt0b78

Zeitschrift:
Boletín de la Real Sociedad Española de Historia Natural. Actas

Datum der Publikation: 2021

Nummer: 115

Seiten: 51-55

Art: Artikel

DIALNET GOOGLE SCHOLAR lock_openOpen Access editor

Zusammenfassung

An Encyonema population collected in the Zambeze River near the Victoria Falls, Namibia, is here described and illustrated in detail with the aid of LM and SEM microscopy. This taxon had already been presented in the literature under the name E. volkii, the reasons leading to treat this species as a new, independent taxon are here discussed. Encyonema ratpanati sp. nov. can be easily distinguished from E. volkii by its more linear outline (length-to-width ratio up to 4.3 vs. up to 3.5 in E. volkii), its lower degree of dorsiventrality, lack of rostrate apices throughout the whole diminution series, wider axial area and denser areolation (>26 lineolae per 10 μm and not 20–22 as in E. volkii).

Bibliographische Referenzen

  • Bruder, K. & Medlin, L. K. 2007. Molecular assessment of phylogenetic relationships in selected species/genera in the naviculoid diatoms (Bacillariophyta). I. The genus Placoneis. Nova Hedwigia, 85: 331–352.
  • Chastain, S. & Pfaffman, J. 2006. GIMP: GNU Image Manipulation Program.
  • Cholnoky, B. J. 1954. Neue und seltene Diatomeen aus Afrika. Österreichische Botanische Zeitschrift, 101: 407–427.
  • Guiry, M. D. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.www.algaebase.org.
  • Hancock, F. D. 1979. Diatom associations and succession in Lake Kariba, South Central Africa. Hydrobiologia, 67: 33–50.
  • Kermarrec, L., Ector, L., Bouchez, A., Rimet, F. & Hoffmann, L. 2011. A preliminary phylogenetic analysis of the cymbellales based on 18s rdna gene sequencing. Diatom Research, 26: 305–315.
  • Krammer, K. 1997a. Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 1. Allgemeines und Encyonema Part. Bibliotheca Diatomologica, 36: 1–382.
  • Kützing, F.T. 1833. Synopsis Diatomacearum oder Versuch einer systematischen Zusammenstellung der Diatomeen. Linnaea, 8: 529–620.
  • Lange-Bertalot, H. 1993. 85 Neue Taxa und uber 100 weitere neu definierte Taxa erganzend zur Susswasserflora von Mitteleuropa Vol.2/1-4. Bibliotheca Diatomologica, 27: 1–454.
  • Liu, Q., LI, J., Wang, Q., Kociolek, J. P. & Xie, S. 2021. Encyonema oblonga (Bacillariophyta, Cymbellaceae), a new species from Shanxi Province, China. Phytotaxa, 480: 284–290.
  • Nakov, T., Ruck, E. C., Galachyants, Y., Spa ulding, S. A. & Theriot, E. C. 2014. Molecular phylogeny of the Cymbellales (Bacillariophyceae, Heterokontophyta) with a comparison of models for accommodating rate variation across sites. Phycologia, 53: 359–373.
  • Reichardt, E. 2007. Neue und wenig bekannte Gomphonema-Arten (Bacillariophyceae) mit Areolen in Doppelreihen. Nova Hedwigia, 85: 103–137.
  • Rich, F. 1937. Contributions to our knowledge of the freshwater algae of africa. Transactions of the Royal Society of South Africa, 24: 207–220.
  • Round, F. E., Crawford, R. M. & Mann, D. G. 1990. Diatoms: biology and morphology of the genera. Cambridge university press, Cambridge.
  • Shinohara, K., Maruyama, A., Rusuwa, B. & Ohtsuka, T. 2014. Taxonomic revision of three diatoms found in Lake Malawi: Afrocymbella brunii (Fricke) comb. nov., Afrocymbella rossii (Kociolek & Stoermer) comb. nov., and Aulacoseira euareolata (O.Müller) comb. nov. et nom. nov. Phycological Research, 62: 9–15.
  • Silva, W. J., Jahn, R., Ludwig, T. A. V & Menezes, M. 2013. Typification of seven species of Encyonema and characterization of Encyonema leibleinii comb. nov. Fottea, 13: 119–132.
  • Silva, W.J.& Souza, M. G. M. 2015. New species of the genus Encyonema (Cymbellales, Bacillariophyta) from the Descoberto River Basin, Central-western Brazil. Phytotaxa, 195: 154–162.
  • Taylor, J., Pope, N. & van Rensburg, L. 2009. Community participation in river monitoring using diatoms: A case study from the Buffelspoort Valley Conservancy. African Journal of Aquatic Sciences, 34: 173–182.
Fuente de los datos: Dialnet