Baghuknautilus, Korn & Hairapetian, 2025

Korn, Dieter & Hairapetian, Vachik, 2025, Late Permian nautiloids from Baghuk Mountain (Central Iran), European Journal of Taxonomy 1019, pp. 1-76 : 63-64

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.17227815

persistent identifier

https://treatment.plazi.org/id/03E487D4-FFE5-493F-FD90-5D068101FE5B

treatment provided by

Plazi

scientific name

Baghuknautilus
status

gen. nov.

Genus Baghuknautilus gen. nov.

urn:lsid:zoobank.org:act:

New genus F – Korn 2025: 69. — Korn & Ghaderi 2025: 8, 98, 102–103.

Type species

Baghuknautilus aplomorphus gen. et sp. nov.

Diagnosis

Genus of the family Julfanautilidae with discoidal, involute conch. The conch rapidly increases in height with a very high to extremely high coiling rate (WER usually higher than 2.50). Whorls moderately strongly embracing, their profile ranges from compressed to weakly depressed. Adult ornament with extremely fine growth lines. Septa without inflexions, slightly concave. Suture line simple, nearly straight to straight with a low external saddle, broadly rounded internal lobe. The siphuncle has a dorsocentral position.

Etymology

Named after the type locality of the type species.

Included species

Central Iran (this paper): Baghuknautilus aplomorphus gen. et sp. nov., Wuchiapingian.

Remarks

In terms of conch morphology, Baghuknautilus gen. nov. shows some similarities to the genera Julfanautilus and Shahrezanautilus gen. nov. This is particularly true for the shape of the whorl profile with slightly flattened, converging flanks and the slightly flattened umbilical wall. However, the other two genera show a much higher coiling rate (WER above 3.00) than Baghuknautilus (WER around 2.50) and a much more pronounced subangular to angular umbilical margin.

Baghuknautilus gen. nov. also has similarity to the Triassic genus Paranautilus ( Kummel 1953; Sobolev 1989), but this differs in the more dorsal position of the siphuncle and the presence of an annular process. In addition, most species of Paranautilus have a convex umbilical wall.

Kingdom

Animalia

Phylum

Mollusca

Class

Cephalopoda

SubClass

Nautiloidea

Order

Nautilida

SubOrder

Liroceratina

SuperFamily

Liroceratoidea

Family

Permonautilidae

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