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  • 1
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    Distribution of Recent Foraminifera from the Southern Coast of Puerto Rico (1973)
    American Museum of Natural History
    In:  Micropaleontology, 19 (4). pp. 385-416.
    Details
    Publication Date: 2020-06-30
    Description: An analsis of cluster patterns of recent foraminifera was determined based on Jaccard coefficients of association using presence/absence data. Six thanatotopes and eight thanatofacies were determined by using cluster analysis. The environmental parameters controlling the thanatotopes are salinity variations and wave agitation in the nearshore area, sidiment distribution and wave agitation on the shallow inner shelf, and cool temperatures and moderately quiet waters on the outer shelf. The thanatofacies patterns, do not completely correspond with the assemblages that characterize the thanatotopes.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Five New Eocene Radiolarian Species from the Norwegian Sea (1972)
    American Museum of Natural History
    In:  Micropaleontology, 18 (3). pp. 386-396.
    Details
    Publication Date: 2020-06-30
    Description: Five new species of Radiolaria, two spumellarians and three nassellarians, are described from an Eocene deep-sea sediment core from the Norwegian Sea. The vertical distribution of three of these five new species, Spongopyle spiralis, Lophocorys norvegiensis and Theocalyptra tetracantha, define two distinct faunal zones within the Late Eocene.
    Type: Article , PeerReviewed
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  • 3
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    Mid-Tertiary Evolution of the Radiolarian Genus Calocycletta (1972)
    American Museum of Natural History
    In:  Micropaleontology, 18 (2). pp. 144-152.
    Details
    Publication Date: 2020-06-30
    Description: During Leg 8 of the Deep Sea Drilling Project several almost complete Tertiary sections were collected in the equatorial Pacific. Examination of this material has led to great improvements in the radiolarian stratigraphy. An evolutionary lineage is proposed for a group of species belonging to the stratigraphically important genus Calocycletta. This group of six species ranged from the Late Oligocene to the Late Miocene in the equatorial fauna.
    Type: Article , PeerReviewed
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  • 4
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    Ecology of the Planktonic Foraminifera Living in the Surface Layer of Drake Passage (1971)
    American Museum of Natural History
    In:  Micropaleontology, 17 (1). pp. 53-68.
    Details
    Publication Date: 2020-06-30
    Description: The planktonic foraminiferal fauna was studied in 104 surface plankton samples collected by the author during the crossing in both directions of Drake Passage between Tierra del Fuego and Elephant Island off the Palmer Peninsula, Antarctica, during the months of January and February, 1969. Samples were gathered by means of a fire pump. This method is discussed and recommended for planktonic foraminiferal collection. Eight species were determined, and their horizontal distribution was established. The percentage abundance of each species, as well as the number of specimens per cubic meter of filtered water, were calculated for every station. Distribution patterns of foraminifers were compared with those obtained by previous authors and were related to the surface hydrology. Some discrepancies were found and discussed. The most simple means of separating Globigerina pachyderma from G. quinqueloba is proposed and the most simple means of locating the Antarctic Convergence by the use of foraminifers is discussed. Abnormal spinosity of foraminiferal tests is considered.
    Type: Article , PeerReviewed
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