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Species Hastigerinella bermudezi Bolli 1957


Diagnosis / Definition:
Bolli (1957):
Shape of test very low trochospiral; equatorial periphery very strongly lobate. Wall calcareous, perforate, surface finely pitted. Chambers: early ones spherical to ovate, the ultimate ones becoming club shaped; 12-15, arranged in about 2 1/2 whorls; the 4-5 chambers of the last whorl increase rapidly in size. Sutures on spiral side slightly curved to radial, depressed; on umbilical side radial, depressed. Umbilicus fairly wide, shallow. Aperture a low arch or slit; interiomarginal, umbilical extraumbilical; a faint lip is visible in well preserved specimens. Coiling trends slightly to dextral in specimens counted from the type locality. Largest diameter of holotype 0.7 mm.
Discussion / Comments:
Bolli (1957):
Hastigerinella bermudezi, new species, differs from H. digitata Rhumbler (=H. rhumbleri Galloway) in its lower trochospiral form and less elongate chambers. The Hastigerinella species of similar aspect described from the Eocene (H. eocena Nuttall, H. colombiana Petters) are not fully preserved specimens and the position of the aperture of the ultimate chamber is not clearly visible. It appears likely that these Eocene forms belong to Clavigerinella which possesses an interiomarginal, symmetrical aperture. No typical species of Hastigerinella are known from the Cretaceous; those described from the Cretaceous belong largely to Hastigerinoides or Praeglobotruncana (see Bolli, Loeblich, and Tappan, 1957). It seems probable that true Hastigerinella does not appear before the Miocene. The species is named for Dr. Pedro J. Bermudez in recognition of his contributions to the micropaleontology of the Caribbean region.
Synonym list:
Bolli (1957):
1945 Hastigerinella eocanica Nuttall. - Cushman & Stainforth : p. 69 pl 13, figs 11a-b
1949 Hastigerinella eocanica Nuttall. - Bermudez : p. 282 pl 22, figs 1-2
1957 Hastigerinella bermudezi Bolli. - Bolli : pl. 25, figs. 1a-c new species
Was used in synonym list of:
Clavatorella bermudezi Bolli 1957
Potentella (Clavotorella) bermudezi Bolli 1957
References:

Cushman,J.A. and Stainforth,R.M. (1945):
The foraminifers of the Cipero Marl Formation of Trinidad, British West Indies . Journal of Foraminiferal Research Vol. 14 p. 1-75

Bermudez,P.J. (1949):
Tertiary smaller foraminifers of the Dominican Republic . Spec. Publ.Cushman Lab. Foraminiferal Res., Vol. 25 p. 1-322

Bolli,H.M. (1957):
Planktonic foraminifera from the Oligocene-Miocene Cipero and Lengua formations of Trinidad, B.W.I..
In: Studies in Foraminifery, Bulletin of the U.S. National Museum Vol. 215 Eds: Loeblich, A.R.Tappan, H.Beckmann, J.P.Bolli, H.M.Gallitelli, E.M.Troelsen, J.C. p. 97-123
Anonymous: Unedited TaxonConcept data
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