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  1. Zooplankton of the South Atlantic Ocean: Acantharia

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    Schewiakoff (1926) observed that Acanthoplegmidae can be found very deep, down to 1000 m, supporting the idea that this family could be represented by the clade Acanth II. Some of the deep acantharian sequences could also be linked to the complex and poorly understood life cycle of Acantharia.
    All of the shell-bearing species of clade E ( Fig. 3 G-L) belong to the sub-order Sphaenacantha (Arthracanthida), but there is no clear pattern at finer taxonomic levels among the sub-groups E1 to E4.
    Due to a rapid dissolution in seawater after death, there is no fossil record of Acantharia, and the evolution of the morphology is therefore enigmatic. The acantharian spicules are single crystals of strontium sulphate, radiating from the cell centre ( Schreiber et al., 1962, Wilcock et al., 1988 ).
    The Holacanthida (genera Acanthocyrtha, Acanthocolla, Staurolithium and Acanthoplegma) is spread over the four clades (A, B, C, and D). The genus Acanthoplegma (family Acanthoplegmidae), represented by a unique individual (Ei 59) forming clade A ( Figure 1, Figure 2 ), is the earliest diverging taxon.
  3. Zooplankton of the South Atlantic Ocean: Acanthocolla cruciata

  4. Molecular Phylogeny and Morphological Evolution of the …

  5. Acanthocolla cruciata - Encyclopedia of Life

  6. Department of Invertebrate Zoology / Protists Handbook …

  7. Acanthocolla cruciata data - Encyclopedia of Life

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