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REVISION OF SOME RECENT FORAMINIFERAL 



GENERA 



By ALFRED R. LOEBLICH, Jr. 

 U. S. National Museum 



AND 



HELEN TAPPAN 

 Research Associate, Smithsonian Institution 



(With 4 Plates) 



INTRODUCTION 



For the past few years we have been restudying the genotype 

 species of Foraminifera, with the aim of estabHshing a firmer basis 

 for the taxonomy and classification of Foraminifera. As some of the 

 early illustrations were quite generalized or inaccurate and the type 

 specimens had not since been restudied, this reexamination is of ex- 

 treme importance. As a result of it, some supposedly well-known 

 genera are found to be synonymous with others and quite unlike what 

 was commonly referred to them. 



We are therefore here redescribing various genera of Recent Foram- 

 inifera, basing these diagnoses upon the type species, so that they 

 may be better understood. Twenty-three Recent genera of Foraminif- 

 era are here described, for which ten generic diagnoses are emended, 

 three genera are suppressed as being synonymous, and four new gen- 

 era, one new species, and one new family are proposed. 



Under each generic description which follows we have given the 

 original reference, listed the type species, and how and when it was 

 designated, given a generic diagnosis, as based upon the type species 

 and in some cases an emendation of the original diagnosis, the location 

 of the types (here again referring only to the type species), and a 

 discussion of the various problems in taxonomy and morphology of 

 the particular genus concerned, and in certain instances the reasons 

 for the suppression of the generic name. 



In the descriptive section of this paper and in the plate explanations 



SMITHSONIAN MISCELLAIMEOUS COLLECTIONS, VOL. 128, NO. 5 



