Cretaceous Planktonic Foraminifera: Part I. Cenomanian

Loeblich, Alfred R.; Tappan, Helen

doi:10.2307/1484364

Cited by 66 publications

(40 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Only new and emended genera and species are discussed below; concepts for the remaining species are based on information presented in the Mesozoic Planktonic Foraminiferal Taxonomic Dictionary (see http://portal.chronos.org/gridsphere/gridsphere?cid5res -foram). The suprageneric classification scheme follows that of Loeblich and Tappan (1987) as modified by Lee (1989), and includes designation of the Paraticinellinae n. subfam. Supergroup RHIZARIA Cavalier-Smith, 2002 Class FORAMINIFERA d'Orbigny, 1826 Order GLOBIGERININA Delage and Hérouard, 1896 Superfamily ROTALIPORACEA Sigal, 1958 Family HEDBERGELLIDAE Loeblich andTappan, 1961 Genus Pseudoguembelitria Huber and Leckie, n. gen.…”

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

“…The suprageneric classification scheme follows that of Loeblich and Tappan (1987) as modified by Lee (1989), and includes designation of the Paraticinellinae n. subfam. Supergroup RHIZARIA Cavalier-Smith, 2002 Class FORAMINIFERA d'Orbigny, 1826 Order GLOBIGERININA Delage and Hérouard, 1896 Superfamily ROTALIPORACEA Sigal, 1958 Family HEDBERGELLIDAE Loeblich andTappan, 1961 Genus Pseudoguembelitria Huber and Leckie, n. gen. Type species: Pseudoguembelitria blakenosensis Huber and Leckie, n. sp.…”

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

“…Named for Blake Nose, a promontory on Blake Plateau, which is the only location where the species has been identified. Family Hedbergellidae Loeblich andTappan, 1961 Subfamily Hedbergellinae Loeblich andTappan, 1961 Genus Hedbergella Brö nnimann and Brown, 1958 Type species: Anomalina lorneiana d'Orbigny var. trocoidea Gandolfi, 1942.…”

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

“…These authors considered Praehedbergella to be a thinner-walled, more finely perforate homologue of Hedbergella. However, Loeblich and Tappan (1987) did not consider wall microstructure as an important distinguishing feature for the hedbergellids and, as a result, they synonymized Praehedbergella under Hedbergella. Banner and Desai (1988) resurrected Praehedbergella by implicitly limiting its definition to include only FIGURE 7.…”

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

See 3 more Smart Citations

Planktic Foraminiferal Species Turnover Across Deep-Sea Aptian/ Albian Boundary Sections

Huber

Leckie

2010

The Journal of Foraminiferal Research

145

137

View full text Add to dashboard Cite

A major planktic foraminiferal species turnover accompanied by a dramatic reduction in shell size, a fundamental change in shell architecture, and a precipitous drop in the abundance of planktic relative to benthic species occurs across the Aptian/Albian boundary interval (AABI) at globally distributed deep-sea sections. Extinction of the large and distinctive planktic foraminifer Paraticinella eubejaouaensis, used to denote a level at or near the Aptian/ Albian boundary, coincides with the extinctions of relatively long-ranging

show abstract

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

Section: Taxonomic Notes and Phylogenetic Classification Of The Aptiamentioning

confidence: 99%

See 2 more Smart Citations

Planktic Foraminiferal Species Turnover Across Deep-Sea Aptian/ Albian Boundary Sections

Huber

Leckie

2010

The Journal of Foraminiferal Research

145

137

View full text Add to dashboard Cite

show abstract

“…We have encountered the same variability of the species from subelongate to clavate chambers as figured by Loeblich and Tappan (1961) sub Hedbergella amabilis. As Hedbergella simplicissima falls into the same spectrum it has priority in nomenclature (see Caron, 1966).…”

Section: Hedbergella Similis Longoriamentioning

confidence: 52%

Early Cretaceous Planktonic Foraminifers from Eastern North Atlantic, DSDP Leg 41

Plfaumann¹,

Krasheninnikov²

1978

Initial Reports of the Deep Sea Drilling Project

View full text Add to dashboard Cite

Early Cretaceous (including the early Cenomanian) sediments were recovered at four sites. Age determinations by the planktonic foraminifers are controlled by the nannofossil record.At Site 367 (Cape Verde Basin), planktonic foraminifers occur only in variegated claystones and black shales of late Aptian to Cenomanian age. Low species diversity, small individual growth, scattered occurrences, and 0 the absence of keeled forms in the higher cores point to a special paleoenvironment.At Site 368 (Cape Verde Rise) black shales with rare occurrences of tiny, poorly preserved planktonic foraminifers of AlbianTuronian age were recovered. Coring ceased within this facies.Site 369 (continental slope off Spanish Sahara), olive-black nannofossil marls, containing partly rich and well-preserved planktonic foraminifers of Aptian and Albian age, were recovered. The Tethyan zonation by planktonic foraminifers could be used, and nearly all zones recorded. Nearly continuous high abundances of planktonic foraminifers point to a paleoenvironment on a quiet slope with accumulation rates lower than today.At Site 370 (deep basin off Morocco) Paleogene sediments overlie nanno-bearing claystones with numerous well-preserved planktonic foraminifers of uppermost Albian and early Cenomanian age, and dark silty claystones and coarse-grained sediments with only reduced amounts of planktonic foraminifers of Hauterivian to early Albian age. The lower section is influenced by mainly terrigenous input, while during the Albian a revolution in paleoenvironmental conditions is indicated by high productivity of the surface water masses and an invasion of a normal°Tethys fauna.Biostratigraphical correlations of Leg 41 holes yielded the separation of 15 time intervals between late Hauterivian and early Cenomanian. In summarizing the results of previous DSDP sites the Early Cretaceous paleogeography of the North Atlantic has to be reconstructed within three main sections: earliest Cretaceous to Valanginian with no planktonic foraminifers, Hauterivian to Albian with scattered and poor record, and Albian to Cenomanian with rich record of planktonic foraminifers. With the planktonic foraminifers we may assume, that during Hauterivian-Albian the North Atlantic had been a relatively small sea, adjacent to the Tethys, divided by the mid-oceanic ridge or ridges into several basins.Planktonic foraminifer fauna is influenced by separation, isolation, and/or dissolution. The Albian/Cenomanian time had open ocean conditions with good faunal exchange to the Tethys, which may be due to a generally higher sea level or due to a subsidence of the ocean floor, while black shale conditions continue in some regions.

show abstract

Late Albian–Coniacian planktic foraminifera and biostratigraphy of the northeastern Caucasus

Tur

Smirnov²,

Huber

2001

Cretaceous Research

View full text Add to dashboard Cite

Cretaceous Planktonic Foraminifera: Part I. Cenomanian

Cited by 66 publications

References 0 publications

Planktic Foraminiferal Species Turnover Across Deep-Sea Aptian/ Albian Boundary Sections

Planktic Foraminiferal Species Turnover Across Deep-Sea Aptian/ Albian Boundary Sections

Early Cretaceous Planktonic Foraminifers from Eastern North Atlantic, DSDP Leg 41

Late Albian–Coniacian planktic foraminifera and biostratigraphy of the northeastern Caucasus

Contact Info

Product

Resources

About