Tardunautilus Korn & Ghaderi, 2025
publication ID |
https://doi.org/10.5852/ejt.2025.1019.3071 |
publication LSID |
lsid:zoobank.org:pub:E24EBF4A-9FE2-47E4-A656-E1698F88BB41 |
DOI |
https://doi.org/10.5281/zenodo.17227719 |
persistent identifier |
https://treatment.plazi.org/id/03E487D4-FFF8-4923-FDD4-5D3886B6F875 |
treatment provided by |
Plazi |
scientific name |
Tardunautilus Korn & Ghaderi, 2025 |
status |
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Genus Tardunautilus Korn & Ghaderi, 2025
Diagnosis
Genus of the family Foordiceratidae with evolute conch; whorl profile rounded triangular or rounded trapezoidal, depressed with broadly rounded venter. Sculpture with one or two rows of conical ribs near the ventrolateral shoulder. Suture line with very shallow external lobe and broadly rounded lateral lobe; without annular process (from Korn & Ghaderi 2025).
Type species
Tardunautilus nimius Korn & Ghaderi, 2025 ; by original designation.
Included species
NW Iran ( Korn & Ghaderi 2025): Tardunautilus nimius Korn & Ghaderi, 2025 , Wuchiapingian; Tardunautilus minor Korn & Ghaderi, 2025 , Wuchiapingian.
Central Iran (this paper): Tardunautilus aperimos sp. nov., Wuchiapingian.
Remarks
The new genus can be easily distinguished from all other genera in the assemblage from Baghuk Mountain because of its combination of a conch shape with a wide umbilicus, a rounded triangular or rounded trapezoidal whorl profile and a sculpture consisting of conical nodes. A genus with a similar morphology is Pseudotemnocheilus , but this is mostly known from much smaller specimens of about 40–60 mm in diameter. These smaller specimens have a much narrower umbilicus (uw/dm ~0.40) compared to Tardunautilus (uw/dm ~ 0.47) and a less depressed whorl profile (ww/wh ~ 1.30) than Tardunautilus (ww/wh ~1.40–1.80). The coiling rate is much lower in Tardunautilus (WER below 2.00) when compared to Pseudotemnocheilus (WER greater than 2.25).
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.
Kingdom |
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Phylum |
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Class |
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SubClass |
Nautiloidea |
Order |
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SubOrder |
Tainoceratina |
SuperFamily |
Pleuronautiloidea |
Family |