Description of Bronnimannia
(
anglais
)
fourni par BioPedia
Sole member of BRONNIMANNIIDAE
Bronnimannia: Brief Summary
(
espagnol ; castillan
)
fourni par wikipedia ES
Bronnimannia es un género de foraminífero bentónico de la familia Bronnimanniidae, de la superfamilia Discorboidea, del suborden Rotaliina y del orden Rotaliida. Su especie tipo es Discorbis palmerae. Su rango cronoestratigráfico abarca desde el Mioceno hasta la Actualidad.
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Diagnosis
(
anglais
)
fourni par World Register of Marine Species
Test auriculate in outline, very low trochospiral to planispiral, whorls enlarging rapidly and test somewhat flared, bievolute and biconcave with broadly truncate periphery marked by a sharp angle at the spiral margin and by a distinct keel at the margin of the umbilical side, chambers increasing more rapidly in breadth than height, sutures curved and depressed on both sides, with a sinuate curve resulting from a proximally directed sutural bend at the peripheral angle; wall calcareous, hyaline, optically radial, umbilical side finely perforate, spiral side more coarsely perforate, surface smooth other than the elevated keel that remains as a continuous imperforate spiral suture visible on all whorls of the umbilical side; aperture a low, interiomarginal slit beneath the umbilical flap or folium, posterior margin of folium marked by a distinct notch, both folium and notch remaining evident on most chambers of the final whorl. ?Oligocene, Miocene to Holocene; Gulf of Mexico; Atlantic; Pacific. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification)
Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp.
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