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@ARTICLE{Krienitz:32070,
      author       = {Krienitz, L. and Hegewald, E. and Hepperle, D. and Wolf,
                      M.},
      title        = {{T}he systematics of coccoid green algae:18{S} r{RNA} gene
                      sequence data versus morphology},
      journal      = {Biologia},
      volume       = {58},
      issn         = {0006-3088},
      address      = {Warsaw},
      publisher    = {Versita},
      reportid     = {PreJuSER-32070},
      pages        = {437 - 446},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The systematics of coccoid green algae is going through a
                      dramatic phase of change. Classical approaches using
                      morphological characters for the circumscription of taxa do
                      not adequately reflect the phylogenetic relationships.
                      Molecular data provide new insights into the phylogeny of
                      coccoid Chlorophyta. Whereas the content of the orders
                      Chlorococcales and Chlorellales needs to be reduced, the
                      order Sphaeropleales comprises more families than in the
                      traditional circumscription. According to molecular
                      biological investigations the Neochloridaceae,
                      Selenastraceae and Scenedesmaceae, formerly classified
                      within the Chlorococcales and later within the Chlorellales,
                      belong to the Sphaeropleales. The Hydrodictyaceae, formerly
                      a member of the Protosiphonales, axe also to be classified
                      in the Sphaeropleales. Some former members of the
                      Ulotrichales, which propagate by binary fission, cluster
                      together with autosporine coccoid taxa within the
                      Chlorellales, Trebouxiophyceae. In this study, by presenting
                      six new 18S rRNA gene sequences of chlorophytes we scroll
                      through a phylogenetic tree that contains the main
                      evolutionary lineages of the Chlorophyta, and we take up
                      different topics of current interest for green algal
                      systematists. (1) Chlorococcum robustum, formerly a member
                      of the Chlorococcales s. str. is shown to be closely related
                      to Chlamydopodium vacuolata; both belong to the
                      Chlamydomonadales. (2) Pectodictyon pyramidale, formerly
                      grouped with the Radiococcaceae, is closely related to
                      Coelastrum reticulatum and both, like other coelastracean
                      taxa, belong to the Scenedesmaceae, Sphaeropleales. (3)
                      Pseudodietyosphaerium jurisii is a member of the Mychonastes
                      clade containing picoplanktonic taxa. This clade is sister
                      group to the Oedogoniales at the base of the Chlorophyceae.
                      A new order will need to be established eventually to
                      accommodate this clade. Whereas the position of (4)
                      Lagerheimia genevensis within the Oocystaceae was confirmed,
                      the former crucigenoid species (5) Cracigeniella
                      rectangularis is to be transferred to this family. The
                      latter two taxa demonstrate that the morphological diversity
                      in the Oocystaceae is wider than expected. This observation
                      is discussed in comparison to the family Chlorellaceae. (6)
                      Catena viridis a former member of the Ulotrichales belongs
                      to the Chlorellales, Trebouxiophyceae.},
      keywords     = {J (WoSType)},
      cin          = {ICG-III},
      ddc          = {570},
      cid          = {I:(DE-Juel1)VDB49},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Biology},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000185878500005},
      url          = {https://juser.fz-juelich.de/record/32070},
}