68 UPPER CRETACEOUS-LOWER TERTIARY FORAMINIFERA 



Genus GLOBOTRUNCANA Cushman 1927 

 Type species: Pulvinulina area Cushman 1926 



19276 Globotruncana Cushman : 91 (Type species : Pulvinulina area Cushman 1926). 



1941 Rosalinella Marie : 237 (Type species : Rosalina linneiana d'Orbigny 1839). 



1956 Rugotruncana Bronnimann & Brosn : 546 (Type species Rugotruncana tilevi Bronnimann 



& Brown 1956). 

 1956 Bucherina Bronnimann & Brown : 557 (Type species : Bucherina sandidgei Bronnimann 



& Brown, 1956). 

 19566 Marginotruncana Hofker : 319 (Type species : Rosalina marginata Reuss 1845). 

 1957a Globotruncanella Reiss : 135 (Type species : Globotruncana citae Bolli 1951 = G/o6o- 



truncana havanensis Voorwijk 1937). 

 1957a Globotruncanita Reiss : 136 (Type species : Rosalina stuarti de Lapparent 1918). 

 1957a Helvetoglobotruncana Reiss : 137 (Type species Globotruncana helvetica Bolli 1943). 



Emended Diagnosis: Test free, trochospirally coiled, with wide range of 

 variation in size and shape, highly or moderately spiro-convex, biconvex plano- 

 convex (umbilico-convex) , concavo-convex, or even parallel-sided ; dorsal side 

 evolute, highly domed, convex, flat or even concave ; ventral side strongly umbilicate, 

 moderately or strongly protruding, convex, flat or even concave ; equatorial periph- 

 ery generally rounded or ovoid, sometimes polygonal, either entire or lobate, with 

 single or double keel ; in double keeled forms, the two keels may be parallel or diver- 

 gent, enclosing a narrow or wide peripheral band either at right angles or inclined to 

 plane or coiling ; axial periphery subrounded, subacute, acute, subtruncate or 

 truncate ; chambers generally arranged in 2-4 whorls, dextrally or sinistrally 

 coiled ; all chambers seen on dorsal side, only those of last whorl seen on ventral side ; 

 initial chambers generally globular, moderately or strongly inflated, later ones 

 variable in shape, being ovoid truncate, lenticular acute, hemispherical, angular 

 conical, angular truncate, angular rhomboid, etc. ; sutures on both sides curved or 

 radial, raised or depressed, sometimes thickened, limbate and beaded ; umbilicus 

 varies in shape and size, rounded, ovoid, stellate or polygonal, moderate or large, with 

 or without an umbilical flange ; primary apertures interiomarginal, umbilical, but 

 umbilicus covered by complex, imperforate cover-plate (tegilla) formed by fusion of 

 apertural flaps extending from each chamber ; these tegilla pierced centrally and at 

 their contacts with umbilical rim by a number of small accessory apertures along 

 which primary apertures and umbilical region in general communicate with outside of 

 test ; tegilla delicate with much thinner wall than rest of test and thus are rarely 

 preserved ; but even when broken they leave remnants along umbilical margin ; 

 wall calcareous perforate, except for imperforate keel or keels, peripheral band and 

 tegilla ; surface smooth or roughened, papillose, nodose, or even spinose ; keel or 

 keels, sutures and umbilical flange either thickened and limbate or strongly beaded ; 

 dorsal keel of each chamber reflected on dorsal side of test as inter-cameral dorsal 

 suture, dorsal keels of successive whorls constituting spiral suture ; ventral keel 

 (when present) reflected on ventral side of test as inter-cameral ventral suture (either 

 raised or depressed) ; it may continue along umbilical rim as raised, beaded, umbilical 

 flange ; i.e. dorsal keel of nepionic stage continuing on following chambers as dorsal 

 inter-cameral sutures, spiral suture and dorsal, marginal keel of last whorl, while 



