Evolution and phylogeny of Mid-Cretaceous (Albian-Coniacian) biserial planktic Foraminifera

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doi: 10.2113/gsjfr.45.1.42
Author(s): Haynes, Shannon J.; Huber, Brian T.; MacLeod, Kenneth G.
Author Affiliation(s): Primary:
University of Missouri at Columbia, Department of Geological Sciences, Columbia, MO, United States
Smithsonian Institution National Museum of Natural History, United States
Volume Title: Journal of Foraminiferal Research
Source: Journal of Foraminiferal Research, 45(1), p.42-81. Publisher: Cushman Foundation for Foraminiferal Research, Ithaca, NY, United States. ISSN: 0096-1191 CODEN: JFARAH
Note: In English. Includes 5 appendices; NSF Grant EAR-0642993. 88 refs.; illus., incl. strat. col., geol. sketch map
Summary: In this paper we critically examine the biostratigraphy and systematics of late Albian-Coniacian biserial planktic foraminifera using measurements and qualitative observations from SEM and X-radiograph images of exquisitely preserved specimens from hemipelagic sediments of southeast Tanzania, augmented by analogous observations of selected Ocean Drilling Program samples and holotypes and paratypes of nearly all species. We document interspecific differences and intraspecific variability, and propose a revised phylogeny for Cretaceous biserial planktic foraminifera placed within a refined biostratigraphic framework. Taxonomic emendations are proposed for the genera Protoheterohelix Georgescu & Huber, 2009, and Planoheterohelix Georgescu & Huber, 2009, and for the species Pr. washitensis (Tappan, 1940), Pr. obscura Georgescu & Huber, 2009, Pl. moremani (Cushman, 1938), Pl. reussi (Cushman, 1938), and Laeviheterohelix reniformis (Marie, 1941). In addition, a neotype is designated for Pl. globulosa (Ehrenberg, 1840), and Pl. praenuttalli n. sp. is described. Biserial speciation events are recognized in the planktic foraminiferal Rotalipora cushmani Zone (latest Cenomanian), Helvetoglobotruncana helvetica Zone (early Turonian), and at the Helvetoglobotruncana helvetica-Marginotruncana schneegansi zonal boundary (middle Turonian).
Year of Publication: 2015
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 10 Paleontology, Invertebrate; Africa; Atlantic Ocean; Biologic evolution; Biometry; Blake Nose; Blake Plateau; C-13/C-12; Carbon; Cretaceous; DSDP Site 463; Deep Sea Drilling Project; East Africa; Electron microscopy data; Foraminifera; IPOD; Invertebrata; Isotope ratios; Isotopes; Leg 171B; Leg 62; Mesozoic; Microfossils; Mid-Pacific Mountains; Middle Cretaceous; Morphology; North Atlantic; North Pacific; Northwest Pacific; O-18/O-16; ODP Site 1050; Ocean Drilling Program; Oxygen; Pacific Ocean; Paleoecology; Phylogeny; Planktonic taxa; Planoheterohelix; Protista; Protoheterohelix; Revision; SEM data; Stable isotopes; Tanzania; Tanzania Drilling Program; Taxonomy; West Pacific; X-ray data
Coordinates: N212101 N212101 E1744004 E1744004
N300600 N300600 W0761406 W0761406
Record ID: 2015021874
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Abstract, Copyright, Cushman Foundation for Foraminiferal Research, Reference includes data from GeoScienceWorld, Alexandria, VA, United States