Menkia celleneuva
| Menkia celleneuva | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temporal occurrence | ||||||||||||
| MN 14, Ruscinium , Middle Pliocene | ||||||||||||
| 4.7 to 4.2 million years | ||||||||||||
| Locations | ||||||||||||
| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Menkia celleneuva | ||||||||||||
| Boeters , Gittenberger & Subai , 1985 |
Menkia celleneuva is an extinct snail - kind from the family of aciculidae (Aciculidae) in the order of architaenioglossa ( "Alt-Bandzüngler"). So far, the species has only been known from a single location in the Pliocene Age in southern France.
features
The very slim-cone-shaped to almost cylindrical housing measures 1.85 to 2.2 mm in height and 0.6 to 0.7 m in width. It has 5¾ to 6 turns with a deep seam. However, the passageways have neither an edge nor a suture thread below the seam. The mouth rises very little on the penultimate passage. The surface of the Protoconch is smooth. The following passageways have weak radial grooves, which give the impression of irregular growth sections at irregular intervals. They are crossed by fine spiral lines. On the penultimate gallery there are about 25 spiral lines that are clearly visible in angled light. The mouth is rounded rhombic in the frontal view. The edge of the mouth is very slightly convex in the center in the side view. But there is no sinulus near the seam. The parietal callus is thin and barely visible, an angularis is missing. The inside of the mouth is only slightly thickened; it is widened towards the navel and turned narrow in the navel area. It lies over the navel as a narrow umbilical callus. A bulge in the neck is missing.
Similar species
In Menkia celleneuva the spiral lines are closer together than in the recent species Menkia horsti . In addition, the radial grooves in Menkia celleneuva are somewhat weaker than in Menkia horsti .
Geographical distribution and age
Menkia celleneuva is only known from the Celleneuve site , Département Hérault , France . The age was given by the first descriptors quite roughly with Pliocene . The age of the site is now more precisely dated by mammalian fossils. They come from zone MN 14 of the Lower Ruscinium . The Ruscinium is a regional level from the terrestrial Neogene of Europe and is today correlated with the global levels of the Zancleum and the lowest Piacenzium . The MN14 zone corresponds roughly to the period 4.7 to 4.2 million years ago in absolute terms.
Taxonomy
The taxon was first described in 1985 by Hans D. Boeters , Edmund Gittenberger and Péter Subai . No new finds have been made since then.
supporting documents
literature
- Hans D. Boeters, Edmund Gittenberger, Péter Subai: The Aciculidae (Mollusca, Gastropoda, Prosobranchia) . Zoologische Verhandelingen, 252: 1–234, Leiden 1989. PDF
- Michael P. Kerney, RAD Cameron & Jürgen H. Jungbluth: The land snails of Northern and Central Europe. 384 pp., Paul Parey, Hamburg & Berlin 1983 ISBN 3-490-17918-8 (p. 90)
- Francisco W. Welter-Schultes: European non-marine molluscs, a guide for species identification = identification book for European land and freshwater mollusks. A1-A3 S., 679 S., Q1-Q78 S., Göttingen, Planet Poster Ed., 2012 ISBN 3-933922-75-5 , ISBN 978-3-933922-75-5
Individual evidence
- ^ Maria Rita Palombo, Andrea Maria Francesco Valli: Remarks on the biochronology of mammalian faunal complexes from the Pliocene to the Middle Pleistocene in France. Geologica Romana, 37: 145–163, 2004 PDF ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Hans D. Boeters, Edmund Gittenberger, Péter Subai: A new genus of Aciculidae (Gastropoda: Prosobranchia) with two new species. Basteria, 49 (1-3): 59-64, Leiden 1985.
