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Two new epizoic Achnanthes species (Bacillariophyta) living on marine turtles from Costa Rica
Majewska, R.; De Stefano, M.; Ector, L.; Bolaños, F.; Frankovich, T.A.; Sullivan, M.J.; Ashworth, M.P.; Van de Vijver, B. (2017). Two new epizoic Achnanthes species (Bacillariophyta) living on marine turtles from Costa Rica. Bot. Mar. 60(3): 303-318. https://dx.doi.org/10.1515/bot-2016-0114
In: Botanica Marina. Walter de Gruyter & Co: Berlin; New York. ISSN 0006-8055; e-ISSN 1437-4323, more
Peer reviewed article  
Available in  Authors 
Keywords
    Achnanthes Bory, 1822 [WoRMS]; Bacillariophyceae [WoRMS]; Bacillariophyceae [WoRMS]; Lepidochelys olivacea (Eschscholtz, 1829) [WoRMS]
    Marine/Coastal
Author keywords
    Achnanthes; Bacillariophyta; Costa Rica; epizoic diatoms; marine turtles
Authors  Top 
  • Majewska, R.
  • De Stefano, M.
  • Ector, L., more
  • Bolaños, F.
  • Frankovich, T.A.
  • Sullivan, M.J.
  • Ashworth, M.P.
  • Van de Vijver, B., more
Abstract
    It has been known for a long time that marine mammals, such as whales and dolphins, host a very specific epizoic community on their skin. Whether or not a similar community exists on the carapaces of sea turtles is less studied. The present paper describes two new epizoic diatoms from the genus Achnanthes sensu stricto, Achnanthes elongata and Achnanthes squaliformis, found on the carapaces of nesting olive ridley sea turtles (Lepidochelys olivacea) in Ostional Beach on the Pacific coast of Costa Rica, based upon detailed scanning electron microscopy and comparison with the type material of Achnanthes groenlandica var. phinneyi and Achnanthes pseudogroenlandica. The two taxa appear to be closely related on the basis of their morphological features including long, slender valves, absence of terminal orbiculi, large cribrate areolae and absence of typical costae on the internal virgae of both valves. They can, however, be differentiated from each other by the number of areolae per stria, the position of the rapheless sternum and differences in their length/width ratio.
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