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Cyrea szymborska gen. et sp. nov., a new textulariid foraminifer from the Mediterranean Sea

Maria Holzmann, Sylvain Rigaud, Shahrouz Amini, Ivan Voltski and Jan Pawlowski
Cyrea szymborska gen. et sp. nov., a new textulariid foraminifer from the Mediterranean Sea
Journal of Foraminiferal Research (April 2018) 48 (2): 156-163


Textulariid foraminifera are characterized by a multichambered test with an agglutinated wall structure. Recent molecular work has shown that the order Textulariida appears as a paraphyletic group within the class Globothalamea. While larger members of the textulariids are fairly well known, smaller forms like the ones described here are often overlooked or synonymized with known species. A new species and genus was isolated from algal samples collected on the French coast of the Mediterranean Sea. Cyrea szymborska gen. and sp. nov., has a trochospiral chamber arrangement, measuring 100-210 mu m in diameter. The organic wall is brownish, opaque, and sparsely agglutinated with diatom frustules and mineral grains, mostly 20 mu m or smaller in size. The proloculus is not agglutinated. The extra-umbilical aperture forms a low arch. It is smooth, not agglutinated, and located on the last chamber. The biochemistry of the organic wall was investigated using Raman spectroscopy, showing that it is made of a meshwork of proteoglycans. A combined analysis of SSU and LSU rDNA sequences confirms the position of Cyrea among textulariids, distantly from all other genera. Molecular analyses revealed two phylotypes belonging to the new genus, one of which is formally described here.

ISSN: 0096-1191
EISSN: 1943-264X
Serial Title: Journal of Foraminiferal Research
Serial Volume: 48
Serial Issue: 2
Title: Cyrea szymborska gen. et sp. nov., a new textulariid foraminifer from the Mediterranean Sea
Affiliation: University of Geneva, Department of Genetics and Evolution, Geneva, Switzerland
Pages: 156-163
Published: 201804
Text Language: English
Publisher: Cushman Foundation for Foraminiferal Research, Ithaca, NY, United States
References: 34
Accession Number: 2018-059536
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, 1 plate
N43°07'60" - N43°07'60", E06°22'00" - E06°22'00"
Secondary Affiliation: Nanyang Technological University, SGP, Singapore
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Abstract, Copyright, Cushman Foundation for Foraminiferal Research. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2018
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