[22 IPPER CRETACEOUS-LOWER TERTIARY FORAMINIFERA 



(1941) as Globotruncana linnet stuarti Vogler and G. linnet marginata (Reuss) to belong 

 to G. letipoldi. 



Reichel (1950) considered G. leupoldi as a junior synonym of G. area (Cushman) 

 while Papp & Kiipper included it in the synonymy of G. fomicata Plummer, and 

 Bronnimann & Brown (1956) followed by Berggren (1962) in that of G. rosetta 

 (Carsey). However, Globotruncana leupoldi is too remote to be related to either 

 G. fomicata or G. rosetta. It is distinguished from typical G. area, from which it is 

 thought to have evolved, by its smaller, slightly compressed test, fewer chambers, 

 less beaded keels and sutures, sharply acute axial periphery on the last chamber and 

 truncate one on the early chambers, its flattened petaloid last chambers on the 

 dorsal side, its single keel on the last one or two chambers and its perfectly smooth 

 surface. 



The form described by Olsson (i960) as G. leupoldi is probably G. area or is tran- 

 sitional to it. 



Hypotype. P.45545. 



Horizon and locality. Figured specimen, from sample No. 18, W. El-Sharaw- 

 na section. 



Stratigraphical range. Globotruncana leupoldi was described by Bolli (1945) 

 from the Wangschichten limestone of Switzerland where it was found to range 

 throughout the Upper Campanian-Maestrichtian. 



In the Esna-Idfu region G. leupoldi ranges throughout the G. fomicata and the 

 G. gansseri Zones. It fades out gradually towards the top part of the latter zone 

 and dies out completely in the basal part of the overlying G. esnehensis Zone. 



Globotruncana lugeoni Tilev 

 (PI. 6, figs. la-d ; PL n, fig. 2) 



1951 Globotruncana lugeoni Tilev : 41-46, pi. 1, figs. 5, 6, text-figs, xoa-c, na-d, ? i2a-e. 

 (See also Tilev 1952 where figures are repeated.) 



Description. Test large, planoconvex, coiled in a very low trochospire ; dorsal 

 side almost flat and slightly imbricate although the chambers are slightly inflated 

 and moderately overlapping ; ventral side strongly inflated and distinctly protruding ; 

 equatorial periphery roughly ovoid, elongate, slightly lobate, with a single well- 

 developed, heavily beaded marginal keel which is slightly shifted towards the dorsal 

 side ; axial periphery subangular ; chambers on the dorsal side about 18, arranged in 

 3.I dextrally coiled whorls, increasing very slowly in size ; initial chambers small 

 subglobular, weakly inflated and almost masked by the surface rugosity ; they are 

 followed by slightly larger subglobular chambers ; the last whorl is composed of 6 

 subcircular, weakly inflated chambers ; on the ventral side the chambers are 6, 

 subglobular, strongly inflated, distinctly protruding and increase so slowly in size 

 that they all appear to be roughly equal except for the last ; sutures on the dorsal side 

 slightly curved, depressed in the early part, strongly curved, raised, thickened and 

 heavily beaded in the later part, although the slight inflation of the chambers makes 



