Foraminifera taxon details
From editor or global species database
Diagnosis Test of moderate size, commonly 2 mm to 5 mm in diameter and may be up to 8 mm, asymmetrical, subconical, large protoconch at the apex of the cone followed by trochospiral early stage and very thin equatorial layer of arcuate chambers situated in a plane below that of the protoconch, equatorial chambers becoming hexagonal toward the test periphery, equatorial layer flanked by numerous lateral chambers on both sides but the more elevated side of the test with a thick protruding central pillar that begins at the protoconch and widens rapidly toward the exterior, lateral chambers adjacent to the pillar larger than other lateral chambers and appear to have a spiral arrangement; wall calcareous, perforate, surface may have pustules on both sides. U. Cretaceous (U. Maastrichtian); S. France; N. Spain. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
From editor or global species database
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