Gastropods from the Late Triassic Nayband Formation (Iran), their relationships to other Tethyan faunas and remarks on the Triassic gastropod body size problem

Nützel, Alexander; Mannani, Maryam; Senowbari‐Daryan, Baba; Yazdi, Mehdi

doi:10.1127/0077-7749/2010/0049

Cited by 22 publications

(21 citation statements)

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“…About 40 gastropod species were reported from the Nayband Formation, most of them from the Tabas/Nayband area (Douglas 1929, Nützel & Senowbari-Daryan 1999. Gastropods from the Isfahan area were reported by Fallahi et al (1983) and Nützel et al (2003Nützel et al ( , 2010. Here, a new collection of gastropods is reported from the Nayband Formation in the vicinity of Natanz.…”

mentioning

confidence: 90%

“…Protorcula iranica sp. nov. also resembles Anulifera binodosa (Fallahi et al 1983) from the Nayband Formation and A. variabilis Zapfe, 1962 from the latest Triassic of the N Alps in shape and in having a fine spiral striation (see Nützel et al 2010). However, Anulifera is characterized by one or two suprasutural rows of nodules and its whorls are not concave.…”

Section: Protorcula Iranica Sp Novmentioning

confidence: 99%

“…Coelostylina conica was also reported from the Nayband Formation at Ali Abad (Howz-e Khan Member) by Nützel & Senowbari-Daryan (1999). Douglas (1929) and Nützel et al (2010) mentioned poorly preserved specimens of Coelostylina from the Isfahan area.…”

Section: Coelostylina Conica (Münster 1841)mentioning

confidence: 99%

“…Cryptaulax? hautmanni Nützel et al, 2010 from the Nayband Formation near Isfahan (location Dizlu) differs from T.? natanzensis in having a median nodular main spiral which angulates the whorls and in having a subsutural row of fine nodes which are more numerous than the nodes on the median spiral rib.…”

Section: Katosira? Lateplicata (Klipstein 1843)mentioning

confidence: 99%

“…Gastropods of the Nayband Formation were studied by Douglas (1929), Fallahi et al (1983), Nützel & Senowbari-Daryan (1999) and Nützel et al (2003Nützel et al ( , 2010. About 40 gastropod species were reported from the Nayband Formation, most of them from the Tabas/Nayband area (Douglas 1929, Nützel & Senowbari-Daryan 1999.…”

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confidence: 99%

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Gastropods from the Norian (Late Triassic) Nayband Formation near Natanz (Iran)

Nützel¹,

Aghababalou²,

Senowbari‐Daryan³

2011

Bull. Geosci.

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A collection of marine gastropods from the Late Triassic (Norian) Nayband Formation of Iran near Isfahan consists of 207 specimens representing 9 species (3 species are new). Rarefaction analyses and diversity indices indicate that the diversity of the studied fauna is much lower than that from the vicinity of Ali Abad (Tabas region) and somewhat less diverse than that of Dizlu (Isfahan region). All known gastropod faunas from the Nayband Formation are dominated by more or less high-spired caenogastropods. However, species composition and rank abundance of the most common taxa differ strongly in all three gastropod collections. The new species are Acilia? basistriata, Teutonica? natanzensis and Protorcula iranica. The present gastropod fauna is dominated by the caenogastropods Coelostylina conica, Protorcula iranica and Teutonica? natanzensis.•

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mentioning

confidence: 90%

Section: Protorcula Iranica Sp Novmentioning

confidence: 99%

Section: Coelostylina Conica (Münster 1841)mentioning

confidence: 99%

Section: Katosira? Lateplicata (Klipstein 1843)mentioning

confidence: 99%

mentioning

confidence: 99%

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Gastropods from the Norian (Late Triassic) Nayband Formation near Natanz (Iran)

Nützel¹,

Aghababalou²,

Senowbari‐Daryan³

2011

Bull. Geosci.

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A Middle Triassic Cassian‐type fauna (Pelsa‐Vazzoler Lagerstätte) and the adaptive radiation of the Modern evolutionary fauna

Dominici,

Danise,

Tintori

2024

Papers in Palaeontology

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We describe a high‐diversity silicified assemblage of marine molluscs (Pelsa‐Vazzoler Lagerstätte) from the upper Ladinian of the Agordo Dolomites (northeastern Italy). New data on the Triassic rebound, after the end‐Permian mass extinction, constrain it to an interval of relatively stable climatic conditions. This Lagerstätte, in the Sciliar Formation, yields a structure comparable to the famous lower Carnian San Cassiano Lagerstätte and suggests that the radiation of benthic molluscs may have occurred as early as the late Middle Triassic. We classified more than 4800 Cassian‐type molluscs, measuring abundance distributions of 109 species, including one new family (Rhaetidiidae), three new genera (Pelsia, Gaetania, Agordozyga) and 21 new species: Grammatodon egortinus, Modiolus friesenbichlerae, Myoconcha busattae, Schizogonium letiziae, Predazzella? monarii, Eucycloscala nitida, Tricolnaticopsis elongatus, Cortinella stricta, Triadoskenea alpicornu, Trachynerita tenuicostata, Coelostylina civettae, Gaetania coronata, Agordozyga caprina, Euthystylus dincae, Zygopleura elongata, Diatrypesis agordina, Cryptaulax pelsae, Pseudoscalites karapunari, Promathildia gracile, Camponaxis ladinica and Striactaeonina ingens. In this fauna, associated with tropical carbonate platforms, epifaunal filter‐feeding bivalves adopted new antipredatory features and gastropods conquered new ecospace, including parasitism and microcarnivory on sponges and scleractinian corals. Small size was an advantage in an ecosystem of small, isolated patch reefs. This is how, where and when caenogastropod and heterobranch snails (groups that today dominate global marine diversity) began their rise in the marine benthos. The origins of some evolutionary innovations that are key to our understanding of the time and place of the Mesozoic Marine Revolution, are therefore pushed back to the Middle Triassic.

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