Danoceras sp. A
publication ID |
https://doi.org/10.5852/ejt.2025.978.2801 |
publication LSID |
lsid:zoobank.org:pub:422E6F06-B4C8-4840-854C-811145D88B32 |
persistent identifier |
https://treatment.plazi.org/id/93268783-9637-7067-FD48-FBF9FCB7F870 |
treatment provided by |
Plazi (2025-03-07 10:46:31, last updated 2025-03-07 11:32:00) |
scientific name |
Danoceras sp. A |
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Fig. 27D
Material examined
ESTONIA • Vormsi Island, Hosholm shore (tower locality); Adila Formation, Pirgu Regional Stage; GIT 878-269.
Description
The specimen comprises parts of a nearly complete mature body chamber and four chambers of the phragmocone, lacking the outer shell. At the base of the body chamber, the conch height and width are 34 mm and 29 mm respectively (CHI = 1.12). The conch cross section is oval, compressed with narrow dorsal and ventral margins, the ventral (prosiphuncular) margin is narrower. The body chamber is 28 mm long, very slightly exogastrically curved. At its base, a narrow band of oncomyarian, buttressed muscle scars occur. A wide, inconspicuous constriction occurs ca 5 mm adapically from the peristome. The peristome is incompletely preserved, and the hyponomic sinus is not seen. At the peristome, the conch height is 32 mm. The sutures form shallow lateral lobes. The adoralmost two sutures are crowded. Adapically, the sutures are 5 mm apart, where the conch height is 33 mm. The siphuncle is preserved near the conch margin. The septal foramen is ca 2 mm wide and the siphuncular segments apparently are relatively narrow, Danoceras -like.
Remarks
This single specimen differs from all known species of Danoceras in its small mature size in combination with a relatively long and tubular body chamber. However, based on this single, fragmentary preserved specimen the erection of a new species is not possible.
GIT |
Institute of Geology at Tallinn University of Technology |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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