i2o UPPER CRETACEOUS-LOWER TERTIARY FORAMINIFERA 



gansseri Bolli, and may possibly represent a transitional stage between the latter and 

 G. lugeoni Tilev, although no direct evidence was recorded. 



Hypotype. P.45544. 



Horizon and locality. Figured specimen from sample No. 16, Gebel Owaina 

 section. 



Stratigraphical range. Gandolfi (1955) described G. gansseri subgansseri 

 from the Colon shale of northeastern Colombia where its range was described as 

 fairly rare in the uppermost Siphogenerinoides bramlettei Zone which he considered to 

 be of Maestrichtian age. 



In the Esna-Infu region, G. gansseri subgansseri appears as a rare to common form 

 in the Middle Maestrichtian G. gansseri Zone. It increases gradually upwards in 

 the section to flood the basal part of the overlying G. esnehensis Zone and then dies 

 out completely near the middle part of this zone. 



Globotrunana havanensis Voorwijk 



1937 Globotruncana havanensis Voorwijk : 195, pi. 1, figs. 25, 26, 29. 



? 1946 Globorotalia pshadae Keller : 99, pi. 2, figs. 4-6. 



1951 Globotruncana citae Bolli : 197, pi. 35, figs. 4-6. 



? 1953 Globotruncana citae Bolli ; Papp & Kiipper : 38, pi. 1, figs. ^a-c. 



? 1953 Globorotalia pshadae Keller ; Subbotina : 204, pi. 16, figs. ia-6c. 



1954 Globotruncana citae Bolli ; Ayala : 387, pi. 3, figs. la-c. 



1954 Globotruncana havanensis Voorwijk ; Ayala : 396, pi. 6, figs. "za-c. 



1955 Globotruncana citae Bolli : Gandolfi : 51, pi. 3, figs. na-c. 



1956 Globotruncana citae Bolli ; Knipscheer (in Ganss & Knipscheer) : 624, pi. 2, figs. $a-c. 

 1956 Rugotruncana havanensis (Voorwijk) Bronnimann & Brown : 552, pi. 22, figs. 4-6, 



pi. 24, fig. 5. 

 19566 Marginotruncana citae (Bolli) Hofker : 334, text-fig. 25. 

 1956c Marginotruncana citae (Bolli) ; Hofker : 79, text-fig. 72. 

 J957 Globotruncana {Globotruncana) citae Bolli ; Edgell : 111, pi. 1, figs. 13-15. 

 1960a Globotruncana citae Bolli ; Hofker : 225, text-figs. 2oa-c. 

 i960 Globorotalia pshadae Keller ; Vinogradov : 307, pi. 2, figs. I5a-i66. 

 1962 Praeglobolruncana (Praeglobotruncana) havanensis (Voorwijk) Berggren : 26-30, pi. 7, 

 figs. la-c. 



Remarks. The taxonomic position of this species has been very much confused ; 

 it was defined as a Globotruncana by Voorwijk (1937), as a Globorotalia by Keller 

 (1946), Subbotina (1953) and Vinogradov (i960), as a Rugotruncana by Bronnimann 

 & Brown (1956) and Pessango (i960), as Marginotruncana by Hofker (19566, c) and 

 as Praeglobotruncana by Bolli (1957a) and Berggren (1962). However, the few 

 specimens recorded in the present study clearly show that the aperture is interio- 

 marginal, umbilical, covered by complex tegilla of which remnants are still preserved, 

 and thus prove that the species should be assigned to the genus Globotruncana. 



Hypotypes. P.45657-58. 



Horizon and locality. Hypotypes from sample 23, Gebel Owaina section. 



