Work

Bactroptyxis subcochlearis

Year: 2024

Type: other

Abstract: Bactroptyxis? subcochlearis (Münster in Goldfuss, 1844) Plate 13: figs 16–18 2022 – Bactroptyxis? subcochlearis (Münster in Goldfuss, 1844) – Gründel, Keupp, Lang and Nützel: 199, pl. 13, figs 6–8 (here more chresonymy and synonymy). Material. 6 specimens and fragments, illustrated specimen SNSB-BSPG 2016 XXI 1921. Remarks. The illustrated specimen is 69 mm high. What was suspected in 2022 can now be proven: The early whorls have only 2 strong spiral cords, one directly subsutural, the other well above the abapical suture. Only gradually a weaker spiral cord is formed between the primary spiral cords. The secondary spiral cord remains significantly weaker than the other two throughout ontogeny. Aptyxis kehlheimensis Schlosser, 1882 (pl. 11: figs 3, 5–7; non fig. 4 in Schlosser) has weaker spiral cords and lacks a secondary third spiral cord.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.14395672

Authors: Gründel, Joachim, Nützel, Alexander

Institutions: Freie Universität Berlin, Bayerische Staatssammlung für Paläontologie und Geologie, Bavarian Natural History Collections, Ludwig-Maximilians-Universität München

Language: English

Topic: Paleontology and Stratigraphy of Fossils

Subfield: Paleontology

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W6912045968

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