STUDIES IN FORAMINIFKRA 



Catapsydrax stainforthi Bolli, Loeblich, and Tappan, new species 



Plate 7, Figures lla-c 



Test free, small, trochospiral, chambers subglobular 

 to ovate, forming about two whorls, with four or rarely 

 five chambers in the final whorl ; sutures distinct, radial, 

 straight to curved, depressed ; wall calcareous, perforate, 

 surface pitted; primary aperture interiomarginal, um- 

 bilical, and covered by a single umbilical bulla with a 

 small infralaminal accessory aperture opening over each 

 suture of the final whorl. 



Greatest diameter of holotype 0.36 mm., thickness 

 0.26 mm. Paratypes range from 0.26 to 0.42 mm. in 

 diameter. 



Remarks: Catapsydrax stainforthi, new species, dif- 

 fers from C. dissimilis (Cushman and Bermudez) in 

 being about one-half as large, and in having a more 

 closely appressed bulla which may extend a short way 

 along the sutures and which has much smaller arched 

 accessory openings that are restricted to the area over 

 the sutm-es, instead of the relatively large arches of C. 

 dissimilis which may open over much of the umbilical 

 area of a chamber. It differs from C. parvulus, new 

 species, and C. unicamis, new species, in having the four 

 or more smaller accessory openings beneath the umbili- 

 cal bulla, rather than a single larger opening at one side 

 only. 



The specific name is given in honor of R. M. Stain- 

 forth, in recognition of his work on the planktonic 

 Foraminifera. 



Types and occurrence: Holotype (USNM P4840) 

 and unfigured paratype (USNM P4841) from the Cip- 

 ero formation, Catapsydrax stainforthi zone (Miocene), 

 Cipero Coast section, Trinidad, B. W. I. 



Unfigured paratypes (USNM P4842) from the Ste. 

 Croix member of the Brasso formation (basal Globiger- 

 inatella insueta zone, Miocene), Ste. Croix quarry, near 

 Broomage trigonometric station, south of Princes 

 Town, Naparima region, Trinidad, B. W. I. 



Catapsydrax unicavus Bolli, Loeblich, and Tappan, new species 

 [Plate 7, Figures 9ar-c 



Test free, small, trochospiral, low-spired, periphery 

 rounded; chambers subglobular, arranged in two 

 whorls, only a few chambers per whorl, ranging from 

 six in the first whorl to only four in the final whorl; 

 sutm-es distinct, depressed, slightly curved; wall cal- 

 careous, perforate, surface punctate or cancellate in 

 appearance, primary aperture interiomarginal, um- 

 bilical, and covered by a small subquadrate bulla which 

 is attached at three sides, with an arched infralaminal 

 accessory opening at the fourth side. 



Greatest diameter of holotype 0.31 mm., thickness 

 0.21 mm. Paratypes range from 0.26 to 0.36 mm. in 

 greatest diameter. 



Remarks: Catapsydrax unicavus, new species, differs 

 from C. dissimilis (Cushman and Bermudez) in being 

 somewhat smaller, with less inflated chambers and less 

 depressed sutures, and the umbilical bulla has a single 



37 



accessory opening rather than two to four as in C. 

 dissimilis. Catapsydrax parvulus, new species, also has 

 a single accessory opening, but differs in being much 

 smaller, with a nearly smooth surface, less globular 

 chambers and nearly flush sutures. 



Types AND occurrence: HolotjTie (USNM P4216) 

 and unfigured paratype (USNM P4217) from the 

 Cipero formation, Globigerina ciperoensis zone, exposure 

 on San Fernando By-pass road, Trinidad, B. W. I. 

 Collected by H. M. BoUi. 



Unfigured paratypes (USNM P4837) from the Cipero 

 formation, Olobigerinatella insueta zone (Miocene) 

 Cipero Coast section, Trmidad, B. W. I. Collected 

 by Hans G. Kugler. 



Genus Globigerinita Bromiiinann, 1951 



Plate 8, Figures la-2c 



Globigerinita Bronnimann, Contr. Cushman Found. Foram. 

 Res., vol. 2, pt. I, p. 18, 1951. 



Type species: Globigerinita naparimaensis Bronni- 

 mann, 1951. Fixed by original designation and 

 monotypy, 



Test free, trochospiral; chambers spherical to ovate; 

 sutures depressed, radial; wall calcareous, perforate, 

 radial in structure, surface smooth, pitted or hispid; 

 primary aperture interiomarginal, umbihcal, in the 

 final stage this aperture is completely covered by an 

 irregular bulla covering the umbilicus and expanding 

 along the earlier sutures, with numerous infralaminal 

 accessory apertures along the margins, both at the 

 jimction with the sutures of earlier chambers and along 

 the contact with the primary chambers. 



Remarks: Globigerinita differs from Globigerina d'Or- 

 bigny in the presence of the umbilical bulla with 

 multiple infralaminal accessory apertures. It differs 

 from Globigerinoita Bronnimann in having a single 

 globigerine primary aperture and a single umbUical- 

 sutural bulla. 



Catapsydrax, new genus, differs in having a more 

 restricted bulla, covering only the umbilical region, 

 and in the accessory apertures being only sutural in 

 position, rather than along the entire bulla margin. 



The specimen selected as holotype of the type species, 

 Globigerinita naparimaensis, is a rather atypical speci- 

 men. The transparent "supplementary chamber" of 

 this specimen is not typical in that it is more globular, 

 resembling a normal chamber which has expanded 

 somewhat on the umbilical side. It has only two small 

 accessory apertures instead of the typical numerous 

 openings along the margins of the bulla. However, 

 although it does not show the generic characters well, 

 this specimen is apparently conspecific with Bronni- 

 mann's paratypes. 



Originally described from the Miocene of Trinidad, 

 the genus has recently been recorded by Conato (1954) 

 from the Italian PUocene. It has also been recorded in 

 Recent sediments. 



Types and occurrence: Holotype of Globigerinita 

 naparimaensis (Cushman Coll. 64182), paratypes 



