Paraliroceras Barskov & Shilovsky, 2014

Korn, Dieter & Hairapetian, Vachik, 2025, Late Permian nautiloids from Baghuk Mountain (Central Iran), European Journal of Taxonomy 1019, pp. 1-76 : 56

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.17227791

persistent identifier

https://treatment.plazi.org/id/03E487D4-FFEC-4937-FE55-5A19817FF919

treatment provided by

Plazi

scientific name

Paraliroceras Barskov & Shilovsky
status

 

Genus Paraliroceras Barskov & Shilovsky in Barskov et al., 2014

Type species

Paraliroceras kazanicum Barskov & Shilovsky in Barskov et al., 2014; original designation.

Diagnosis

Genus of the family Liroceratidae with pachyconic, subinvolute conch. The conch is rapidly increasing in height with a high coiling rate (WER = 2.30–2.90). Whorls moderately embracing, whorl profile reniform; umbilical margin pronounced, narrowly rounded. Adult ornament with fine growth lines with a fairly deep ventral sinus. Septa without inflexions, slightly concave. Suture line simple, nearly straight to straight with a shallow, broadly rounded internal lobe. The siphuncle has a position between the centre of the septum and the venter.

Included species

Western Russia ( Barskov et al. 2014): Paraliroceras kazanicum Barskov & Shilovsky in Barskov et al., 2014, Roadian.

Central Iran (this paper): Paraliroceras macrogaster sp. nov., Wuchiapingian.

Remarks

Paraliroceras is similar to Liroceras and differs mainly in the pronounced umbilical margin, which is narrowly rounded in Paraliroceras but usually broad and evenly rounded in Liroceras . The species of Paraliroceras are more widely umbilicate than most known species of Liroceras .

Kingdom

Animalia

Phylum

Mollusca

Class

Cephalopoda

SubClass

Nautiloidea

Order

Nautilida

SubOrder

Liroceratina

SuperFamily

Liroceratoidea

Family

Liroceratidae

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