112 



TnsriTED STATES NATIONAL MUSEUM BULLETIN 215 



Catapsydrax dissimilis zone, Trinidad, sample Bo 267 

 (TTOC 201216). 



Remarks: Globoguadrina aitispira globosa, new sub- 

 species, is distinguished from G. aitispira aitispira (Cush- 

 man and Jarvis) by having more globular chambers. 



Genus Hastigerinella Cushman, 1927 

 Hastigerinella bermudezi Bolli, new species 



Plate 25, Figures la-c 



Hastigerinella eocanica Nuttall, Cushman and Stainfobth, 

 Cushman Lab. Foram. Res., Spec. Publ. 14, p. 69, pi. 13, 

 figs, lla-b, 1945. — Bermudez, Cushman Lab. Foram. Res., 

 Spec. Publ. 25, p. 282, pi. 22, figs. 1-2, 1949. 



Shape of test very low trochospiral ; equatorial pe- 

 riphery very strongly lobate. Wall calcareous, perfo- 

 rate, surface finely pitted. Chambers: early ones spheri- 

 cal to ovate, the ultimate ones becoming club-shaped; 

 12-15, arranged in about 2^ whorls; the 4-5 chambers 

 of the last whorl increase rapidly in size. Sutures on 

 spiral side slightly curved to radial, depressed; on um- 

 bilical 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. 



Stratigraphic range {in Cipero formation): Globo- 

 rotalia JoJisi barisanensis zone. 



Locality: Holotype (USNM P5628) from the type 

 locality of the Globorotalia fohsi barisanensis zone, 

 Trinidad, sample Bo 202 (TTOC 193125). 



Remarks: 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 sim- 

 ilar aspect described from the Eocene (H. eocena 

 Nuttall, H. colombiana Fetters) are not fully preserved 

 specimens and the position of the aperture of the ulti- 

 mate 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 micropaleon- 

 tology of the Caribbean region. 



Genus Globigeriaoides Cushman, 1927 

 Globigerinoides triloba (Reuss) 



Globigerinoides sacculifera (Brady) and G. saceulifera 

 immatura Le Roy are closely related to G. triloba 

 (Reuss) . Forms transitional between those species are 

 often difficult to place with certainty. The members 

 of the group appear almost simultaneously in the Cipero 

 formation towards the top of the Globorotalia kugleri 



zone. For these reasons Globigerinoides sacculifera and 

 G. sacculifera immatura are here treated as subspecies 

 of G. triloba which has priority as a specific name. A 

 fourth subspecies, G. triloba altiapertura, is here de- 

 scribed as new. Spiral and umbilical views of the sub- 

 species of G. triloba, G. rubra (d'Orbigny) and G. obliqua, 

 new species, are shown in text-figure 21. G. triloba 



Figure 21. — Shape of test and position of apertures in some species and 

 subspecies of Globigerinoides (a, umbilical view; b, spiral view): 

 No. 1, Globigerinoides triloba triloba (Reuss); No. 2, Globigerinoides 

 triloba immatura Le Roy; No. 3, Globigerinoides triloba altiapertura 

 Bolli, new subspecies; No. 4, Globigerinoides triloba sacculifera 

 (Brady) ; No. S, Globigerinoides obliqua Bolli, new species; No. 6, 

 Globigerinoides rubra (d'Orbigny). 



triloba differs from G. triloba immatura in havirg a final 

 chamber that is larger than all the earlier chambers 

 combined. G. triloba sacculifera differs from G. triloba 

 immatura in having a terminal, elongate, sacklike 

 chamber. G. triloba altiapertura differs from G. triloba 

 immatura in having a high arched, primary aperture. 

 Globigerinoides rubra (d'Orbigny) differs from the G. 

 triloba group and G. obliqua, new species, in the position 

 of the primary interiomarginal, umbilical aperture and 

 supplementary sutural apertmes. In G. rubra each 

 apertiu-e is a fairly high arch symmetrically placed above 

 the suture between two earlier chambers (see text-fig. 

 21, Nos. 6a,b); in the subspecies of G. triloba and G. 

 obliqua each aperture is placed above the two sutures 

 between three earlier chambers (see text-fig. 21, Nos. 

 4a,b, 5a,b) or distinctly asymmetrical above the suture 

 between two earlier chambers (see text-fig. 21, No. la). 



Globigerinoides triloba triloba (Reuss) 



Plate 25, Figures 2a-c; Text-figure 21, No. 1 



Globigerina triloba Reuss, Denkschr. Akad. Wiss. Wien, Math.- 

 Nat. Classe, vol. 1, p. 374, pi. 47, figs, lla-d, 1850. 



Stratigraphic range (in Cipero and Lengua forma- 



