Undetermined undetermined-D Flower 1950
Year: 2025
Type: article
Abstract: Discosorida fam., gen. et sp. indet. D Fig. 46E–F Material examined ESTONIA • 1 spec.; Sutlema old quarry; Kõrgessaare Formation, Vormsi Regional Stage; TUG 1827- 162. Description The specimen is a 50 mm long, fragment of a mature body chamber; it is slightly endogastrically curved with a circular conch cross section.At its base, the conch diameter is 40 mm. The suture, as reconstructed from the base of the body chamber, is straight and transverse with a distinct narrow saddle at the position of the siphuncle. The septal foramen is almost marginal with a width of 5 mm (RSH = 0.125). No traces of the outer shell are preserved. Remarks This relatively incomplete fragment of a mature body chamber (likely from a cyrtogomphoceratid) is documented herein, because it cannot be assigned to any of the known genera or species known from Estonia or from the literature. It differs from species of Kiaeroceras in being more strongly curved and in lacking the characteristic narrowly rounded prosiphuncular margin. It differs from species of Strandoceras in having a circular conch cross section.
Author: Kröger, Björn
Institutions: University of Helsinki, Finnish Museum of Natural History
Language: English
Subfield: Paleontology
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W6949870461
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