174 IM'PER CRETACEOUS-LOWER TERTIARY FORAMINIFERA 



rectlinear spiral suture, and its surface texture is not as rough as that of the present 

 species. 



Globigerina nodosa sp. nov. probably evolved from G. chascanona Loeblich & 

 Tappan although no direct evidence was recorded. 



Holotype. P. 45581. 



Paratypes. P. 45582. 



Horizon and locality. Holo- and paratypes, from sample No. 49, Gebel 

 Owaina section. 



Stratigraphical range. Globigerina nodosa sp. nov. is a rather rare form 

 occuring only in the G. aequajG. esnaensis Subzone of upper Upper Paleocene age. 



Globigerina soldadoensis Bronnimann 



19526 Globigerina soldadoensis Bronnimann : 9-1 1, pi. I, figs. 1-9. 



1953 Acarinina interposita Subbotina : 231, pi. 23, figs. 6a-jc. 



19576 Globigerina soldadoensis Bronnimann ; Bolli (pars) : 71, pi. 16, figs. 7-9, non figs. 10-12. 



Remarks. Globigerina soldadoensis Bronnimann is distinguished by its medium 

 sized to large, low trochospiral test ; its granular, heavily papillose, nodose surface ; 

 its 4-5 large roughly quadrangular chambers in the last whorl which are elongated in 

 the direction of coiling ; its straight, radial, strongly depressed sutures on both sides, 

 and its wide umbilicus. 



G. soladoensis is very closely related to G. mckannai White from which it is believed 

 to have evolved by the reduction in size and in the number of chambers of test. 

 The form described by Bolli (1957&, pi. 16, figs. 10-12) as transitional between 

 G. soladoensis and G. gravelli Bronnimann, is most probably G. mckannai White. 

 Bolli stated that G. soldadoensis is closely related to G. primitiva Finlay ; however, 

 Bolli's G. primitiva (pi. 15, figs. 6-8) is actually G. stonei Weiss, which may be related 

 to the present species although it is much smaller. 



Gartner & Hay (1962) described as G. soldadoensis Bronnimann, a form which may 

 belong to G. esnaensis (Le Roy) as can be seen from their figures. 



Hypotype. P.45583. 



Horizon and locality. Hypotype from sample No. 63, Gebel Owaina section. 



Stratigraphical range. The species was first described from the Paleocene- 

 Eocene Lizard Springs, Soldado and Navet formations of Trinidad, and was recorded 

 from the same formations by Bolli (1957&). It was also recorded from the Paleocene 

 and Lower Eocene of the Caribbean region (Bermudez 1961) and from the " zone of 

 conical Globorotalias " of the northern Caucasus, (Subbotina 1953). 



In the Esna-Idfu region, G. soldadoensis occurs as a rare form in the G. aequaj 

 G. esnaensis Subzone of uppermost Paleocene age, and continues in the overlying 

 Lower Eocene G. wilcoxensis Zone. 



