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Species Globigerinelloides blowi Bolli 1959


Diagnosis / Definition:
Leckie (1990):
Test small (0.10-0.15 mm), evolute. Five to six smooth, inflated, subspherical to ovoid chambers in the final whorl. Chambers increase gradually in size as added. Umbilicus wide. Aperture a low arch with thin lip; relict apertures not discernible.
Discussion / Comments:
Caron (1985):
Bolli (1959) distinguished two species on the basis of spherical as against laterally compressed chambers, as did Chevalier (1961) with his two species. G. blowi differs from G. subcarinata in the absence of an acute axial margin, from G. ultramicra in having fewer chambers.
Leckie (1990):
Typical specimens of Globigerinelloides blowi s.l. have four to five chambers in the final whorl (Masters, 1977; Leckie, 1984),although Longoria (1974, pl. 4, fig. 7) illustrates a specimen with as many as seven. Specimens from Hole 693A have five to six chambers in the final whorl. Six-chambered forms bear a strong resemblance to G. aptiense Longoria (see illustrations by Longoria, 1974, and Leckie, 1984). G. blowi s.l. is characterized by its distinctive small size, smooth surface, and inflated chambers. G. aptiense tends to be larger, up to 0.40 mm according to Longoria (1974). In addition, the overall chamber shape and arrangement differ from G. blowi s.l., and G. aptiense lacks the smooth surface of G. blowi s.l. Therefore, despite having as many as six chambers in the final whorl, the specimens from Hole 693A are assigned to the G. blowi group. Leckie (1984) noted that G. blowi s.l. is particularly common through the upper Aptian of DSDP Site 545 (eastern North Atlantic), and then becomes rare in lower and middle Albian strata.
Pflaumann & Krasheninnikov (1977):
Five to six chambers form the involute last coil. Umbilicus shallow, wide. This species had been recorded from Aptian strata of Trinidad, France, Bavaria, Mexico, and Spain. Longoria (1974) reported its range from early Aptian to Hedbergella gorbatchikae Zone (late Aptian).
Systematics:

5
 Classis Foraminifera
  Familia Planomalinidae
   Genus Globigerinelloides
    Species Globigerinelloides blowi

22
  Superfamilia Globigerinaceae
   Familia Schackoinidae
    Genus Globigerinelloides
     Species Globigerinelloides blowi
Synonym list:
Caron (1985):
1959 Planomalina blowi Bolli. - Bolli : p.260 pl 20 figs 2a-b
1959 Planomalina maridalensis Bolli. - Bolli : p.261 pl 20 figs 6a-b
1961 Globigerinella duboisi Chevalier. - Chevalier : p.205 pl 1 figs 15 a-b
1961 Globigerinella gottisi Chevalier. - Chevalier : p.205 pl 1 figs 9a-b
1985 Globigerinelloides blowi Bolli. - Caron : 66, 67 figs 29.10-11
Leckie (1990):
1959 Planomalina blowi Bolli. - Bolli : p. 260, pl. 20, figs. 2, 3.
1974 Globigerinelloides blowi Bolli. - Longoria : p. 82-83 pl. 4, figs. 4, 7, 11-13.
1984 Globigerinelloides blowi Bolli. - Leckie : p. 593 pl. 1, figs. 4-8
1990 Globigerinelloides blowi Bolli. - Leckie : Pl. 1, Figs. 8-13 as Globigerinelloides aff. blowi group
Pflaumann & Krasheninnikov (1977):
1959 Planomalina blowi Bolli. - Bolli : p.260 pl. 20; fig. 6
Was used in synonym list of:
Blowiella blowi Bolli 1959
Blowiella solida Kretchmar & Gorbatchik 1986
Blowiella maridalensis Bolli 1959
References:

Bolli,H.M. (1959):
Planktonic foraminifera from the Cretaceous of Trinidad, B.W.I. . Bulletins of American Paleontology Vol. 39 p. 257-277

Chevalier,J. (1961):
Quelques nouvelles espèces dans le Cretaceinférieur méditerranéen . Revue de Micropaléontologie Vol. 4 p. 30-36

Longoria,J.F. (1974):
Stratigraphic, morphologic and taxonomic studies of Aptian planktonic Foraminifera . Revista Espanola de MicropaleontologíaNo extraord p. 1-107

Pflaumann,U. and Krasheninnikov,V.. (1977):
Early Cretaceous planktonic foraminifers from eastern North Atlantic, DSDP Leg 41 .
In: Initial Reports of the Deep Sea Drilling Project 41 , Abidjan, Ivory Coast, to Malaga, Spain, February-April 1975 Eds: Gardner, J..Herring, J.. p. 539-564

Leckie,M.R. (1984):
Mid-Cretaceous planktonic foraminiferal biostratigraphy off Morocco, Deep Sea Drilling Project Leg 79, Sites 545 and 547 . Initial Reports of the Deep Sea Drilling Project Vol. 79 p. 579–620

Caron,M. (1985):
Cretaceous planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 17–86

Leckie,M.R. (1990):
Middle Cretaceous Planktonic Foraminifers of the Antarctic Margin: Hole 693A, ODP Leg 113.
In: Proceedings of the Ocean Drilling Programme Vol. 113 Eds: Parker, P.F..Kennett, J.P.O'Connell, S..Pisias, N.G. p. 319-324
Anonymous: Unedited TaxonConcept data
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