An Early Triassic (Dienerian) microgastropod assemblage from the Salt Range, Pakistan and its implication for gastropod recovery from the end-Permian mass extinction

Nützel, Alexander; Ware, David; Bucher, Hugo; Hautmann, Michael; Roohi, Ghazala; Ur‐Rehman, Khalil; Yaseen, Aamir

doi:10.3140/bull.geosci.1682

Cited by 6 publications

(4 citation statements)

References 31 publications

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“…However, C. conica has no pits on its shell. Coelostylina hydrobiformis Nützel & Ware in Nützel et al ., from the Early Triassic (Dienerian) of Pakistan also has tiny pits but is much smaller, has lower whorls and strongly opisthocyrt growth lines (Nützel et al . ).…”

Section: Coelostylina Micropunctata Sp Nov Figurementioning

confidence: 99%

“…Coelostylina hydrobiformis Nützel & Ware in Nützel et al ., from the Early Triassic (Dienerian) of Pakistan also has tiny pits but is much smaller, has lower whorls and strongly opisthocyrt growth lines (Nützel et al . ). Spirally arranged micro‐pits have been reported for C. brevissima (Kittl, ) from the Marmolada Limestone by Böhm () and for C. solida (Koken in Wöhrmann & Koken, ) from the Carnian of the South Alps by Broili ().…”

Section: Coelostylina Micropunctata Sp Nov Figurementioning

confidence: 99%

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Middle Triassic (Anisian, Bithynian) gastropods from North Dobrogea (Romania) and their significance for gastropod recovery from the end‐Permian mass extinction event

Nützel

Kaim

Grădinaru

2018

Papers in Palaeontology

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A new early middle Anisian (Bithynian) gastropod fauna is described from the Mahmudia quarry in North Dobrogea, Romania. At least 22 species are reported, nearly all of them from Tubiphytes-limestones which represent a microbial buildup. Twenty species from Tubiphytes-buildup limestones are characterized, ten of which in open nomenclature due to insufficient preservation. One genus (Murchisonietta gen. nov) and ten species are described as new. The new species are Euryalox applanatus, Rasatomaria multistriata, (Humiliworthenia) anisica, Marmolatella iordanae, Ladinaticella simionescui, Murchisonietta acuta and Coelostylina micropunctata. The present fauna is one of the most diverse Anisian gastropod faunas known to date and sheds light on the pattern of ongoing recovery from the end-Permian mass extinction event. It is dominated by Neritimorpha, Caenogastropoda and Pleurotomariida both in abundance and number of species. Diversity of Pleurotomariida strongly exceeds that of any known Early Triassic gastropod fauna and suggest a pronounced rebound of this group. High-spired smooth caenogastropods (Omphaloptycha and Polygyrina) are relatively abundant but for the most part not enough well preserved for species identification. The present gastropod fauna is part of a diverse invertebrate fauna probably comprising more than 50 species with gastropods being the most diverse followed by bivalves and brachiopods. They were microbialbuildup dwellers while metazoan frame-builders, especially corals, were still absent as consequence of the end-Permian mass extinction event. The Mahmudia fauna suggests that metazoan reefs recovered more slowly than benthic faunas.

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Section: Coelostylina Micropunctata Sp Nov Figurementioning

confidence: 99%

Section: Coelostylina Micropunctata Sp Nov Figurementioning

confidence: 99%

Middle Triassic (Anisian, Bithynian) gastropods from North Dobrogea (Romania) and their significance for gastropod recovery from the end‐Permian mass extinction event

Nützel

Kaim

Grădinaru

2018

Papers in Palaeontology

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“…This marine signature is also present in the Nammal Gorge Section ofIqbal et al (2014) placing it as Dienerian-Smithian boundary. Most recently, this transgression has also been described by Dienerian microgastropods ofNützel et al (2018), interpreting them as living under poor-oxygenated conditions. Ammonoids such as Prionolobus rotundatus, Flemingites bhargavai, Xenodiscoides perplicatus, and Flemingites nanus were reported from the CM of Nammal Gorge(Brühwiler et al, 2012) implying increased sea levels.…”

mentioning

confidence: 80%

“…This is in contrast with the Nammal Gorge Section of Iqbal et al (2014) where greenish shale of open marine environment is the dominant lithology with thin limestone intercalations at the base of the Mittiwali Member. Nützel et al (2018) have reported micro‐gastropods at 06 m from the base of the CM. The NW palaeocurrent flow determined by Iqbal et al (2014) indicates a fluvial‐dominated sandstone in the Nammal Gorge Section corresponding to tidal siltstones of the Zaluch Nala.…”

Section: Discussionmentioning

confidence: 99%

Insight to the geological character of the Early Triassic strata in the Western Salt Range, Pakistan: A comparative study

et al. 2021

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The sedimentary strata along the Permian–Triassic Boundary in the Western Salt Range of the sub‐Himalayas were analysed to gain an insight of its geological character regarding palaeoenvironments, palaeoclimate, and sequence stratigraphic attributes. The Early Triassic Mianwali Formation is dominated by shallow marine facies with transgressive phases, differentiation in facial character, and palaeowater depth among different sections. The study suggests that compared to the siliciclastic‐dominated Nammal Gorge Section, the Zaluch Nala Section is more carbonate‐dominated, representing algal‐laminated limestones, dolomitic marls, and siliciclastics – mainly restricted to the Mittiwali Member. There is a general decrease in ammonoids and increase in thickness from east to west, that is believed to be due to algal‐induced rapid sedimentation in the shallow marine environments as compared to deeper marine in the east. The Mianwali Formation has been deposited in two transgressive systems tracts, two highstand systems tracts, and one falling‐stage regressive systems tract. Two flooding surfaces, one each in the Mittiwali and Narmia members, have been recognized. The maximum regressive surfaces at the bottom (with the Chhidru Formation) and top (with the Tredian Formation) mark second‐order eustatic falls. The study also advocates for existence of a low‐energy platform in the temperate waters of the Palaeo‐Tethys. The sediments have similarities with various sections of Gondwanaland having the same trend of shallow marine facies and presence of algal‐laminated deposits. In the Middle Triassic, the gradual loss of sediment binding organisms shifted the low‐energy meandering patterns to high‐energy braided systems.

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Gigantic gastropods from the Middle Triassic Qingyan biota of Guizhou

Sun,

Tian,

Liu

et al. 2024

Palaeoworld

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An Early Triassic (Dienerian) microgastropod assemblage from the Salt Range, Pakistan and its implication for gastropod recovery from the end-Permian mass extinction

Cited by 6 publications

References 31 publications

Middle Triassic (Anisian, Bithynian) gastropods from North Dobrogea (Romania) and their significance for gastropod recovery from the end‐Permian mass extinction event

Middle Triassic (Anisian, Bithynian) gastropods from North Dobrogea (Romania) and their significance for gastropod recovery from the end‐Permian mass extinction event

Insight to the geological character of the Early Triassic strata in the Western Salt Range, Pakistan: A comparative study

Gigantic gastropods from the Middle Triassic Qingyan biota of Guizhou

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