Praeglobotruncana delrioensis Plummer 1931 (TaxonConcept

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Species Praeglobotruncana delrioensis Plummer 1931

Discussion / Comments:

Caron (1985):
This species is the oldest representative of the genus Praeglobotruncana, evolving from Hedbergella delrioensis by acquisition of numerous pustules along the periphery, at least on early chambers of the last whorl. It differs from P. stephani in its lower trochospire and acute pustulose equatorial ridge.
Pflaumann & Krasheninnikov (1977):
According to Loeblich and Tappan (1961, p. 282), the species differs from the similar Praeglobotruncana stephani by its nearly biconvex shape and rounded chambers, while P. stephani is planoconvex and has angular to rhomboidal chambers. Additional P. stephani has somewhat larger sizes. The species is known from late Albian and Cenomanian of Southern USA, Trinidad, Switzerland, and Bavaria.

Systematics:

5
Classis Foraminifera
  Familia Globotruncanidae
   Genus Praeglobotruncana
    Species Praeglobotruncana delrioensis

22
  Genus Praeglobotruncana
   Species Praeglobotruncana delrioensis

52
  Familia Rotaliporidae
   Subfamilia Hedbergellinae
    Genus Praeglobotruncana
     Species Praeglobotruncana delrioensis

Synonym list:

Caron (1985):

1931 Globorotalia delrioensis Plummer. - Plummer : 199-200 pl 13 fig 2

1985 Praeglobotruncana delrioensis Plummer. - Caron : 68, 69 figs 30.1-2

Loeblich & Tappan (1961):

1931 Globorotalia delrioensis Plummer. - Plummer : p.199 pl. 13; fig. 2

non 1940 Globorotalia delrioensis Plummer. - Tappan : p.123 pl. 19; fig. 14

1946 Globorotalia marginaculeata Loeblich & Tappan. - Loeblich & Tappan : p.257 pl. 37, fig. 19-21; text-fig. 4A

non 1946 Globorotalia delrioensis Plummer. - Loeblich & Tappan : p.257 text-fig. 4B

1950 Globotruncana stephani Gandolfi. - Mornod : p.587 pl. 15, fig. 9a-r, 10-17; text-fig. 10 (1-3)

1952 Praeglobotruncana delrioensis Plummer. - Bermudez : p.52 pl. 7; fig. 1

1954 Globorotalia delrioensis Plummer. - Frizzell : p.129 pl. 20; fig. 27

1954 Globorotalia marginaculeata Loeblich & Tappan. - Frizzell : p.129 pl. 20; fig. 29

1954 Globotruncana stephani Gandolfi. - Hagn & Zeil : p.33 pl. 2, fig. 7; pl. 5, fig. 7-8

p 1956 Praeglobotruncana delrioensis Plummer. - Brönnimann & Brown : p.53 pl. 21, fig. 8-10; pl. 24, fig. 16, 17; text-fig. 9, 11, 13a-b, d, 15c-f, 16b [non fig. 16c-e]

1957 Praeglobotruncana delrioensis Plummer. - Bolli et al. : p.39 pl. 9; fig. 1

1957 Praeglobotruncana cf. delrioensis Plummer. - Bolli : p.55 pl. 12; fig. 4

1959 Praeglobotruncana (Praeglobotruncana) cf. stephani Gandolfi. - Banner & Blow : pl. 3; fig. 4

1961 Praeglobotruncana delrioensis Plummer. - Loeblich & Tappan : p.291 pl. 6; fig. 9-12

non 1983 Praeglobotruncana delrioensis Plummer. - ZIEGLER : p.199

Pflaumann & Krasheninnikov (1977):

1931 Globorotalia delrioensis Plummer. - Plummer : p.199 pl. 13; fig. 2

1977 Praeglobotruncana delrioensis Plummer. - Pflaumann & Krasheninnikov : p.559 pl. 4; fig. 1-3

Was used in synonym list of:

Praeglobotruncana stephani Gandolfi 1942

References:

Plummer,H.J. (1931):
Some Cretaceous foraminifera in Texas . University of Texas Bulletin Vol. 3101 p. 109-203

Tappan,H. (1940):
Foraminifera from the Grayson Formation of northern Texas . Journal of Paleontology Vol. 14 p. 93-126

Loeblich,A.R. and Tappan,H. (1946):
New Washita foraminifera . Journal of Paleontology Vol. 20 p. 238-258

Mornod,L. (1950):
Les Globorotalides du Cretace superieur du Montsalvens, (Prealpes fribourgeoises) . Eclogae Geol. Helv. Vol. 42(2) p. 573-596

Bermudez,P.J. (1952):
Estudio sistematico de los Foraminiferos rotaliformes . Venezuela Minist. Minas e Hidrocarb., Bol. Geol. Vol. 2(4) p. 1-230(pls.1-35)

Frizzell,D.L. (1954):
Handbook of Cretaceous foraminifera of Texas . Texas Univ., Bur. Econ. Geol., Rept. Invest. Vol. 22 p. 1-232(pls.1-21)

Hagn,H. and Zeil,W.. (1954):
Globotruncanen aus dem Ober-Cenoman und Unter-Turon der Bayrischen Alpen . Eclogae Geol. Helv. Vol. 47(1) p. 1-60(pls.1-7)

Brönnimann,P. and Brown,N.K. (1956):
Taxonomy of the Globotruncanidae . Ecoglae geologicae Helvetiae Vol. 48 p. 503-561

Bolli,H.M. (1957):
The genera Praeglobotruncana, Rolatipora, Globotruncana and Abanthomphalus in the Upper Cretaceous of Trinidad. . Bull. U.S. natl. Mus. Vol. 215 p. 51-60

Bolli,H.M.; Loeblich,A.R. and Tappan,H. (1957):
Planktonic foraminifera families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae . United States National Museum Bulletin Vol. 215 p. 3-50

Banner,F.T. and Blow,W.H. (1959):
The classification and stratigraphical distribution of the Globigerinaceae . Paleontology Vol. 1(2) p. 1-27

Loeblich,A.R. and Tappan,H. (1961):
Cretaceous planktonic foraminifera: Part I-Cenomanian . Micropaleontology Vol. 7 p. 257-304

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

ZIEGLER,B.. (1983):
Einführung in die Paläobiologie, Teil 2. Spezielle Paläontologie: Protisten, Spongien und Coelenderaten, Mollusken. p. 409 pp.

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

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