Cyptendoceras undefined-a
Creators
- 1. Finnish Museum of Natural History, University of Helsinki, PO Box 44, FI- 00014 Helsinki, Finland.
- 2. Paläontologisches Institut und Museum, University of Zurich, Zurich, Switzerland.
Description
Cyptendoceras sp. A
Fig. 9F–G
Material examinedSpecimen FMNH-P30426, from Profilstranda section, adjacent to Hinlopenstretet, Spitsbergen, bed PO 07, 4 m above base of Olenidsletta Member, V1 a trilobite zone, Blackhillsian, Floian.
DescriptionThe specimen is a fragment of a slightly crushed 30 mm long portion of a body chamber with the last septum preserved. The conch is smooth, straight and slender and has an elliptically depressed cross section with a height of 18 mm and a width of 22 mm (rW = 1.22). The preserved septum forms a suture that is slightly oblique across the flanks of the conch shifted toward the aperture at the antisiphuncular side of the conch; it forms shallow lateral saddles, is almost transverse dorsally, and forms a deep, broad u-shaped ventral lobe. The siphuncle is marginally positioned and elliptically depressed with a septal perforation 8 mm in height and 9 mm in width (rSD = 0.4). No details of the septal necks or the connecting ring are preserved.
RemarksThe specimen is assigned to Cyptendoceras because of the presence of the characteristic u-shaped ventral lobe. However, neither the septal spacing, nor the details of the septal necks and connecting ring are known, which precludes a species level determination of the specimen.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Cyptendoceratidae
- Genus
- Cyptendoceras
- Kingdom
- Animalia
- Material sample ID
- FMNH-P30426
- Order
- Tetrabranchia
- Phylum
- Mollusca
- Species
- undefined-a
- Taxon rank
- species