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Species Globanomalina planoconica Subbotina 1953


Discussion / Comments:
Pearson et al. (2006):
DISCUSSION.- Blow (1979) regarded Globorotalia pseudochapmani Gohrbandt, described from the lower Eocene of Austria, as a junior synonym of Globanomalina planoconica. Blow's illustrations of G. planoconica from an Atlantic Ocean piston core match Gohrbandt's illustrations of the holotype and paratype of his species, which show an additional chamber in the ultimate whorl and a broader apertural lip than the holotype. Blow regarded his and Gohrbandt's specimens as advanced morphotypes of planoconica. Additional study may or may not show the validity of Gohrbandt's species, but for the sake of taxonomic stability we follow Blow's concept of planoconica. See the Atlas of Paleocene Planktonic Foraminifera (Olsson and others, 1999) for further discussion of this species. STRATIGRAPHIC RANGE.- Zone P4c to Zone E6.
Systematics:

17
 Genus Globanomalina
  Species Globanomalina planoconica

35
  Ordo Foraminiferida
   Superfamilia Globigerinaceae
    Familia Hedbergellidae
     Genus Globanomalina
      Species Globanomalina planoconica
Synonym list:
Olsson et al. (1999):
1953 Globorotalia planoconica Subbotina. - Subbotina : p. 263 holotype: pl. 17, figs. 4a-c; paratypes, figs. 5a-c, 6a-c (Caucasus, Kheu River, ser. F1, Zone of conical globorotaliids, lower to middle Eocene (probably upper Paleocene)
References:

Subbotina,N.N. (1953):
Iskopaemye foraminifery SSSR (Globigerinidy, Khantkenininidy i Globorotaliidy) . Trudy Vsesoyznogo Nauchno-Issledovatel'skogo Geologo-razvedochnogo Instituta (VNIGRI) Vol. 76 p. 296

Olsson,R.K.; Berggren,W.A.; Hemleben,C. and Huber,B.T. (1999):
Atlas of Paleocene planktonic foraminifera - online version. , Smithsonian Contributions to Paleobiology Vol. 85 p. 1-252

Pearson,P.N.; Olsson,R.K.; Hemleben,C.; Huber,B.T. and Berggren,W.A. (2006):
Atlas of Eocene Planktonic Foraminifera. p. 1-513
Anonymous: Unedited TaxonConcept data
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