Some New and Revised Genera and Families of Hyaline Calcareous Foraminiferida (Protozoa)

Based on new information as to wall microstructure, morphology as indicated in thin sections, and other morphologic features, some foraminiferal genera are revised and additional new genera, families, and subfamilies are proposed in the order Foraminiferida. The genus Dentalina is restricted, the genus Enantiodentalina is reinstated, and Dentalinella is reinstated as validated by Loeblich and Tappan in 1964. Jenkinsina is placed in synonymy with Chiloguembelitria. Camagueyia is redescribed on the basis of new material, and shown not to be agglutinated, but to have a thick lamellar calcareous wall, and to be referrable to the family Rotaliidae. The type species of Turbinulina (a synonym of Ammonia) is discussed. New family group taxa in the suborder Lagenina are the new family Ichthyolariidae, subfamily Spirolingulininae (family Vaginulinidae), and subfamily Falsoguttulininae (family Polymorphinidae); the suborder Rotaliina includes the new family Heronalleniidae, and in the family Rotaliidae, the subfamily Ammoniinae is transferred from family status. The 11 new genera, and included new species, are Laevidentalina and L. aphelis n. sp. (subfamily Nodosariinae, family Nodosariidae), Percultazonaria, Reticulopalmula, Prismatomorphia, and Psilocitharella (all subfamily Lenticulininae, family Vaginulinidae), Strigialifusus and Mitrapolymorphina (subfamily Polymorphininae, family Polymorphinidae), Gallitellia (family Guembelitriidae), Drepaniota and D. pachutaense n. sp. (subfamily Pleurostomellinae, family Pleurostomellidae), Rhodanopeza (family Cibicididae), Cocoarota (family Gavelinellidae), and Loisthostomata and L. exiguum n. sp. (family Parrelloididae). Numerous foraminiferal genera and species, both living and fossil, are being restudied currently by us, as part of an on-going reclassification and revision of genera and higher taxonomic categories. We have prepared and examined numerous thin sections of the foraminiferal tests, and restudied and illustrated many species using scanning electron microscopy. The information thus obtained has resulted in redefinition of some genera, as well as suprageneric modifications. Other species have proven sufficiently distinct to require the proposal of new genera. Some of these revisions concerning foraminifers with proteinaceous or agglutinated tests have been published (Loeblich & Tappan, 1984a,b, 1985a,b); revisions and new taxa included here are of various hyaline calcareous genera and higher categories in the suborders Lagenina, Globigerinina, and Rotaliina. The classification of Loeblich & Tappan (1984a) is followed, with additions and changes as noted. References are given for all genera mentioned that have appeared since the compilation in Treatise on Invertebrate Paleontology (Loeblich & Tappan, 1964). 1 Research supported by National Science Foundation Grant EAR-8306170, jointly funded by the Earth Sciences Section Programs in Stratigraphy and Paleontology and by the Biological Sciences Program of Systematic Biology. TRANS. AM. MICROSC. Soc. , 105(3): 239-265. 1986. Copyright, 1986, by the American Microscopical Society, Inc. This content downloaded from 157.55. 39.92 on Wed, 22 Jun 2016 06:05:49 UTC All use subject to http://about.jstor. org/terms TRANS. AM. MICROSC. SOC.