Pleistocene epilithic foraminifera from the Arctic Ocean

Area of Science:

• Paleontology
• Oceanography
• Marine Biology

Background:

• Benthic foraminifera are crucial indicators of marine environments.
• Epilithic foraminifera, which attach to surfaces, are often overlooked in Arctic studies.
• Pleistocene glacial sediments in the Arctic Ocean contain a unique record of past marine life.

Purpose of the Study:

• To identify and characterize attached epilithic foraminifera in Pleistocene Arctic Ocean sediments.
• To understand the ecological role and adaptations of these foraminifera in extreme environments.
• To expand the known diversity of epilithic foraminifera in high-latitude regions.

Main Methods:

• Analysis of sediment cores from the central Arctic Ocean.
• Microscopic examination and identification of foraminiferal specimens.
• Taxonomic classification of attached epilithic foraminifera based on morphological characteristics.

Main Results:

• Twelve types of epilithic foraminifera were identified, colonizing lithic and biogenic grains.
• Genera identified include *Rhizammina, Hemisphaerammina, Ammopemphix, Diffusilina, Subreophax, Placopsilina, Placopsilinella, Hormosinelloides,* and *Tholosina*.
• The presence of mat-like and ribbon-like forms of uncertain taxonomic affinity was also noted.

Conclusions:

• Attached epilithic foraminifera are an important component of Pleistocene Arctic benthic assemblages.
• These agglutinated foraminifera are adapted to colonize substrates in extremely oligotrophic conditions.
• Further research is needed to clarify the taxonomic status of unusual forms and their ecological significance.