Hyalinea marmarica, a new species of benthic Foraminifera from the Sea of Marmara (Turkey)

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doi: 10.2113/gsjfr.37.4.309
Author(s): Spezzaferri, Silvia; Yanko-Hombach, Valentina
Author Affiliation(s): Primary:
University of Fribourg, Department of Geosciences, Geology and Paleontology, Fribourg, Switzerland
Other:
Avalon Institute of Applied Science, Canada
Volume Title: Journal of Foraminiferal Research
Source: Journal of Foraminiferal Research, 37(4), p.309-317. Publisher: Cushman Foundation for Foraminiferal Research, Ithaca, NY, United States. ISSN: 0096-1191 CODEN: JFARAH
Note: In English. 48 refs.; 2 plates, 4 tables, sketch map
Summary: Traditionally, the benthic foraminifera Hyalinea balthica (Schroter) has been considered a species with high intraspecific variability, possibly related to climatic changes, and, therefore, a potential indicator of paleoclimate in the Mediterranean Sea. However, a stable and characteristic morphology very different from the syntype of the species can be observed in specimens from the Sea of Marmara. By identification and documentation of this morphology and a subsequent comparison to specimens similar to the type species, clear differences between the two groups have been established. Hyalinea marmarica n. sp. is proposed as an example of possible environment-related speciation in benthic foraminifera. It differs from H. balthica in having less numerous chambers in the last whorl (maximum of eight), depressed sutures at least in the last four chambers, a moderate increase in chamber size as added, a subacute profile and accessory apertures on the peripheral margin. Speciation could have occurred between 14 and 12 ka. At this time, increasingly efficient connections were progressively established between the Sea of Marmara and the Eastern Mediterranean Sea, allowing Hyalinea balthica to migrate into the Sea of Marmara. Here this species might have modified its morphology in response to the extreme environmental conditions.
Year of Publication: 2007
Research Program: ODP Ocean Drilling Program
Key Words: 03 Geochronology; 10 Paleontology, Invertebrate; Absolute age; Asia; Benthic taxa; C-14; Carbon; Cenozoic; Cores; East Mediterranean; Europe; Foraminifera; Holocene; Hyalinea balthica; Invertebrata; Isotopes; Israel; Italy; Leg 160; Marine sediments; Mediterranean Sea; Microfossils; Middle East; Middle Holocene; Morphology; New taxa; ODP Site 963; Ocean Drilling Program; Protista; Quaternary; Radioactive isotopes; SEM data; Sea of Marmara; Sediments; Sicily Italy; Southern Europe; Taxonomy; Turkey
Coordinates: N370202 N370202 E0131046 E0131046
N403000 N410000 E0290000 E0270000
Record ID: 2007128495
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Abstract, Copyright, Cushman Foundation for Foraminiferal Research, Reference includes data from GeoScienceWorld, Alexandria, VA, United States