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  1. Paracalanus aculeatus - Wikipedia

  2. WoRMS - World Register of Marine Species - Paracalanus …

  3. Paracalanus aculeatus - Species Card - Marine Planktonic Copepods

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    The division of Paracalanus agrees with the species groups established by Sewell (1929; Paracalanus aculeatus group, Paracalanus parvus group; Fig. 1 ). One aspect of the separation was the different structure of the genital segment in ventral view. The two species were not separated in the present morphological phylogenetic analysis.
    The genus Paracalanus was polyphyletic: one clade comprised species of the Paracalanus aculeatus group; a second clade proved to be not closely related and included species of the Paracalanus parvus group. The genus Mecynocera (Clade 1) formed the sister-group to all other paracalanid genera in all phylogenetic analyses.
    The genus Parvocalanus (Clade 2) was sister to Clade 3, which contained the remaining genera. Clade 3 was again divided in three clades (Clades 4–6); Clade 4 contained the genera Acrocalanus and Bestiolina, as well as species of the Paracalanus aculeatus group ( P. aculeatus and P. denudatus ).
    Despite their ecological importance, the evolutionary and systematic relationships within the family remain largely unknown, with contradictory results from numerous studies since Giesbrecht (1893) erected the family Paracalanidae, which included the genera Acrocalanus, Calocalanus and Paracalanus ( Fig. 1 ). Fig. 1.
  5. Paracalanus Boeck, 1865 - World Register of Marine Species

  6. WoRMS - World Register of Marine Species - Paracalanus …

  7. Paracalanus aculeatus - Search SeaLifeBase

  8. Paracalanus aculeatus minor - Species Card - Marine Planktonic …

  9. Paracalanus aculeatus, female. A. habitus, dorsal; B. habitus, lateral ...

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