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A new species of Lucanicum (Cyclophorales, Bacillariophyta) associated with loggerhead sea turtles from South Africa
Majewska, R.; Robert, K.; Van de Vijver, B.; Nel, R. (2020). A new species of Lucanicum (Cyclophorales, Bacillariophyta) associated with loggerhead sea turtles from South Africa. Botany Letters 167(1): 7-14. https://dx.doi.org/10.1080/23818107.2019.1691648
In: Botany Letters. Taylor & Francis: London. ISSN 2381-8107; e-ISSN 2381-8115, more
Peer reviewed article  

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Keywords
    Bacillariophyceae [WoRMS]; Caretta caretta (Linnaeus, 1758) [WoRMS]
    Marine/Coastal
Author keywords
    Barnacle; biofilm; epibiosis; epizoic diatom; Indian Ocean; loggerhead;marine; South Africa

Authors  Top 
  • Majewska, R.
  • Robert, K., more
  • Van de Vijver, B., more
  • Nel, R.

Abstract
    A new Lucanicum species, L. ashworthianum Majewska, K.Robert & Van de Vijver sp. nov., was found in multiple samples of biofilm growing on loggerhead sea turtles Caretta caretta and their symbiotic barnacles Chelonibia testudinaria collected on the beaches of Kosi Bay, eastern coast of South Africa, during the two nesting seasons (the austral summers of 2017/2018 and 2018/2019). The new species possesses several features typical of the genus Lucanicum, including the uniseriate striae composed of one large macroareola, the presence of large apical slit fields and transapically elongated rimoportulae at both poles, and a cingulum composed of numerous open, doubly perforated copulae. It differs from the only other Lucanicum species known to date, the coral-associated L. concatenatum, in having considerably smaller cells with clearly rostrate or sub-capitate apices and internal rimoportula opening composed of a C-shaped inner lip and an oval, flap-like outer lip – a feature not observed previously in Lucanicum. Based on these new observations, an amendment of the genus description is proposed.

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