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runs along the edge of the spiral side while the periphery on the umbilical side may have an incompletely developed keel formed by pustules. Early chambers are globular, later ones rhomboidal in section. The wall is calcareous, perforate and pustulate, especially on the umbilical side. The primary aperture is interiomarginal, bordered by a wide porticus (flap).
214:
is coiled in a low to flat trochospiral. The spiral side is flat, with curved, raised and oblique sutures. The umbilical side is convex with radial depressed sutures and a wide umbilicus containing portici (asymmetrical apertural flaps) and tegilla (umbilical coverings). A distinct peripheral keel
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2003. Characterization of late
Campanian and Maastrichtian planktonic foraminiferal depth habitats and vital activities based on stable isotopes. Palaeogeography, Palaeoclimatology, Palaeoecology 202 (2003)
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Loeblich, A.R and H. Tappan, 1988. Forminiferal Genera and their
Classification
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248:, World Foraminifera Database, accessed 3 December 2018
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195:, that had a fairly wide distribution in the
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265:Treatise on Invertebrate Paleontology
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221:, based on stable isotope study (C
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16:Genus of single-celled organisms
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427:Fossil taxa described in 1951
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183:is a genus of planktonic
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42:Scientific classification
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203:). The type species is
376:Paleobiology Database
257:Alfred R. Loeblich Jr
27:Temporal range: Late
219:Gansserina gansseri
205:Gansserina gansseri
275:Sigal Abramovich,
187:, included in the
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290:Taxon identifiers
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417:Rotaliida genera
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189:globigerinid
185:foraminifera
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163:Type species
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101:Foraminifera
72:(unranked):
60:(unranked):
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322:Wikispecies
170:G. gansseri
411:Categories
328:Gansserina
298:Gansserina
246:Gansserina
233:References
212:Gansserina
180:Gansserina
156:Bolli 1951
150:Gansserina
120:Suborder:
29:Cretaceous
24:Gansserina
113:Rotaliida
53:Eukaryota
313:Q6438554
307:Wikidata
132:Family:
84:Phylum:
77:Rhizaria
48:Domain:
368:1204200
355:7606383
191:family
144:Genus:
108:Order:
96:Class:
89:Retaria
394:722179
389:WoRMS
363:IRMNG
342:7ZV7Z
277:et al
225:and O
381:1473
350:GBIF
280:1-29
259:and
337:CoL
65:SAR
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31:(
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