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is a genus of foraminiferal protists included in the
Rotaliida with a stratigraphic range extending from the Eocene to recent and a cosmopolitan distribution. The test is an asymmetrically biconvex trochospiral that may be bi-involute or partially evolute on the spiral side. Chambers are numerous,
165:, and has a distinct umbilical plug. The wall is calcareous, optically radial; the surface finely perforate and smooth overall. The periphery angular to carinate (keeled); the aperture an interiomarginal slit on the umbilical side, bordered by a lip.
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prefers warm and shallow water (less than 30 m) and mainly inhabits the seafloor between the coastline and coral reefs. Also, the test is quite hard compared with many other more fragile foram tests which allows them to survive in wave agitated water.
282:; Koukousioura, Olga (April 2012). "Observations on the Life Cycle of the Symbiont-Bearing Foraminifer Amphistegina Lobifera Larsen, an Invasive Species in Coastal Ecosystems of the Aegean Sea".
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broad. and low, strongly curved back at the periphery to form chamber prolongations. The umbilical side is stellate, like that of
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Treatise on
Invertebrate Paleontology, Part C, Protista 2(2)
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190:; the Amphisteginidae at that time included in the
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278:Triantaphyllou, Maria; Dimiza, Margarita;
172:in the Amphisteginidae along with related
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397:45f7b5be-83ea-4ddf-ad9b-654c89c1d5ac
168:Loeblich and Tappan, 1964 included
225:Short Treatise on Foraminiferology
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284:Journal of Foraminiferal Research
16:Genus of single-celled organisms
464:Extant Eocene first appearances
263:The most common foram of Hawaii
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194:, the Asterigerinidae in the
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56:Scientific classification
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296:10.2113/gsjfr.42.2.143
418:Paleobiology Database
48:Amphistegina gibbosa
241:2012-06-16 at the
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405:Open Tree of Life
309:Taxon identifiers
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459:Rotaliida genera
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27:Temporal range:
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146:d'Orbigny, 1826
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361:Amphistegina
347:Amphistegina
317:Amphistegina
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202:Amphistegina
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192:Orbitoidacea
187:Tremastegina
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181:Eoconuloides
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170:Amphistegina
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162:Asterigerina
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155:Amphistegina
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140:Amphistegina
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91:Foraminifera
74:(unranked):
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24:Amphistegina
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341:Wikispecies
196:Discorbacea
453:Categories
212:References
175:Boreloides
332:Q20685875
103:Rotaliida
326:Wikidata
239:Archived
122:Family:
86:Phylum:
79:Rhizaria
31:- Recent
410:4803750
387:1062439
374:8106632
134:Genus:
98:Order:
436:112080
394:NZOR:
184:, and
29:Eocene
431:WoRMS
423:23878
382:IRMNG
369:GBIF
356:AFD
292:doi
67:SAR
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