Hedbergella Mitra
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Angularica
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Kuznetsovae
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Kuhryi
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Infracretacea
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Hispaniae
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Hiltermanni
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Hexacamerata
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Handousi
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Hagni
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Gorbachickae
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Hedbergella Excelsa
''Hedbergella'' is an extinct genus of planktonic foraminifera from the Cretaceous, described by Loeblich and Tappan, 1961, as: Test free, trochospiral, biconvex, umbilicate, periphery rounded with no indication of keel or poreless margin; chambers globular to ovate; sutures depressed, radial, straight or curved; wall calcareous, finely perforate, radial in structure, surface smooth to hispid or rugose; aperture an interiomarginal, extraumbilical-umbilical arch commonly bordered above by a narrow lip or spatulate flap, ... Includes species otherwise similar to ''Praeglobotruncana'' but which lack a keel or poreless margin, hence is regarded as a separate genus rather than as a subgenus of ''Praeglobotruncana'' as by Banner and Blow (1959). ''Hedbergella'' was named by Brönnimann and Brown in 1958, and is included in the family Hedbergellidae and the suborder Globigerinina. ''Hedbergella'' ranges through most of the Cretaceous, from the Hauterivian to the Maastrichtian at the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |