Leptomaria phacoides Zittel 1873

Leptomaria phacoides Zittel, 1873? Plate 2: fig. 6 Material. A single shell fragment, SNSB – BSPG 2016 XXI 1631. Remarks. The fragment of ca. four whorls shows a well preserved ornament. It possibly belongs to Leptomaria phacoides but it has a higher and more slender spire than the specimen described above as L. phacoides. Both have the selenizone below mid-whorl on the last whorl and in a suprasutural position in spire whorls. The whorl face including selenizone is covered with numerous spiral cords which are broader than the furrows separating them. The growth lines are prosocline and prosocyrt between the adapical suture and selenizone and prosocyrt between selenizone and abapical suture. The base is not preserved.

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2024-12-11
DOI
https://doi.org/10.5281/zenodo.14392179
Primary Topic
Diatoms and Algae Research
Type
article
Field-Weighted Citation Impact
0.00
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article

Leptomaria phacoides Zittel 1873

Zenodo (CERN European Organization for Nuclear Research)
Diatoms and Algae Research
article

Leptomaria phacoides Zittel 1873

article en

Abstract

Leptomaria phacoides Zittel, 1873? Plate 2: fig. 6 Material. A single shell fragment, SNSB – BSPG 2016 XXI 1631. Remarks. The fragment of ca. four whorls shows a well preserved ornament. It possibly belongs to Leptomaria phacoides but it has a higher and more slender spire than the specimen described above as L. phacoides. Both have the selenizone below mid-whorl on the last whorl and in a suprasutural position in spire whorls. The whorl face including selenizone is covered with numerous spiral cords which are broader than the furrows separating them. The growth lines are prosocline and prosocyrt between the adapical suture and selenizone and prosocyrt between selenizone and abapical suture. The base is not preserved.

Zenodo (CERN European Organization for Nuclear Research)
Bayerische Staatssammlung für Paläontologie und Geologie (DE), Freie Universität Berlin (DE), Ludwig-Maximilians-Universität München (DE)
Openalex Percentile: Top 79%
Diatoms and Algae Research
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