Georgescu, Marius D. and Huber, Brian T. (2007): Taxonomic revision of the late Campanian-Maastrichtian (Late Cretaceous) planktonic foraminiferal genus Rugotruncana Broennimann and Brown, 1956, and a new paleontological species concept for planktonic Foraminifera
Leg/Site/Hole:
Related Expeditions:
ODP 113
Identifier:
ID:
2007-037439
Type:
georefid
ID:
10.2113/gsjfr.37.2.150
Type:
doi
Creator:
Name:
Georgescu, Marius D.
Affiliation:
University of Saskatchewan, Department of Geological Sciences, Saskatoon, SK, Canada
Role:
author
Name:
Huber, Brian T.
Affiliation:
Smithsonian Institution National Museum of Natural History, United States
Role:
author
Identification:
Title:
Taxonomic revision of the late Campanian-Maastrichtian (Late Cretaceous) planktonic foraminiferal genus Rugotruncana Broennimann and Brown, 1956, and a new paleontological species concept for planktonic Foraminifera
Year:
2007
Source:
Journal of Foraminiferal Research
Publisher:
Cushman Foundation for Foraminiferal Research, Ithaca, NY, United States
Volume:
37
Issue:
2
Pages:
150-159
Abstract:
The Late Cretaceous (late Campanian-Maastrichtian) planktonic foraminiferal genus Rugotruncana Bronnimann and Brown, 1956 is thoroughly revised. The genus is monospecific, with Rugotruncana circumnodifer (Finlay, 1940) being the only species included within it. Taxonomic revision of the genus was made by examination of type specimens of all species assigned to Rugotruncana in the past. The genus is characterized by the presence of an imperforate band and a weakly to strongly developed double keel along the test periphery. In addition, detailed scanning electron microscope observations reveal that the test ornamentation is asymmetrical, with variably developed rugae and costellae being parallel to the periphery on the spiral side and meridional on the umbilical side. These features serve to distinguish Rugotruncana from Rugoglobigerina and GLOBOTRUNCANA: Based on the morphological features revealed by the detailed test ultrastructure and ornamentation observations, Rugotruncana is included within Family Rugoglobigerinidae. A new paleontological species concept is proposed to accommodate Rugotruncana circumnodifer and other species of Cretaceous planktonic foraminifera.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:-16.4413 West:-33.0558 East:
178.1300 South:-65.0938
Keywords: Invertebrate paleontology; Atlantic Ocean; Australasia; Cretaceous; Exmouth Plateau; Foraminifera; holotypes; Indian Ocean; Invertebrata; Kerguelen Plateau; Leg 113; Leg 114; Leg 119; Leg 122; Maud Rise; Mesozoic; microfossils; morphology; New Zealand; North Island; Ocean Drilling Program; ODP Site 689; ODP Site 690; ODP Site 698; ODP Site 700; ODP Site 738; ODP Site 761; ODP Site 762; ornamentation; paratypes; phylogeny; planktonic taxa; Protista; Ruboglobigerinidae; Rugotruncana circumnodifer; SEM data; South Atlantic; Southern Ocean; taxonomy; Upper Cretaceous; Weddell Sea; Whangara New Zealand;
.