A high resolution Middle Triassic ammonoid standard scale in the Tethys realm; a preliminary report

Mietto, Paolo; Manfrin, Stefano

doi:10.2113/gssgfbull.166.5.539

Cited by 68 publications

(47 citation statements)

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“…, p.141, fig. 11.5; Shevyrev ; Mietto & Manfrin ) of both gastropod assemblages is documented by a rich and diverse ammonoid fauna (Forel & Grădinaru ; E. Grădinaru, in prep. )…”

Section: Methodsmentioning

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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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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“…, p.141, fig. 11.5; Shevyrev ; Mietto & Manfrin ) of both gastropod assemblages is documented by a rich and diverse ammonoid fauna (Forel & Grădinaru ; E. Grădinaru, in prep. )…”

Section: Methodsmentioning

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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“…Berdasarkan himpunan spesies ammonoid yang ditemui, kedua-dua lokaliti fosil QZ480 dan QZ467 merupakan dua lokaliti penting di Malaysia yang mewakili dua zon ammonoid berusia Trias Tengah iaitu yang mewakili usia Anisian (QZ480) dan Ladinian (QZ467). Himpunan ammonoid Anisian didapati mempunyai genus Balatonites yang boleh dikorelasikan dengan Zon Balatonites manakala himpunan ammonoid Ladinian pula mempunyai genus Frankites yang boleh dikorelasikan dengan Zon Protrachyceras berdasarkan korelasi dengan skala piawai ammonoid rantau Tethys yang dibina oleh Mietto & Manfrin (1995). Kedudukan kedua-dua himpunan ammonoid ini digambarkan dalam Rajah 4.…”

Section: Biostratigrafi Dan Usiaunclassified

“…Pada tahun 1971, Tozer telah mengkaji semula genus Paratrachyceras dan menamakannya sebagai Frankites. Berdasarkan skala piawai ammonoid yang disediakan oleh Mietto & Manfrin (1995) dan disokong oleh Konstantinov (2008) (Mietto & Manfrin 1995). Dari segi korelasi biostratigrafi pula, kedua-dua spesies ammonoid indeks yang dikenalpasti iaitu Balatonites cf.…”

Section: Zon Protrachyceras (Subzon Regoledanus)unclassified

“…Dari segi korelasi biostratigrafi pula, kedua-dua spesies ammonoid indeks yang dikenalpasti iaitu Balatonites cf. balatonicus (Mojsisovics) dan Frankites regoledanus (Mojsisovics) menunjukkan korelasi yang sangat baik dengan spesies-spesies indeks dalam skala piawai ammonoid rantau Tethys yang dibangunkan oleh Mietto & Manfrin (1995) seperti ditunjukkan dalam Rajah 5. Korelasi sebegini belum pernah dilakukan bagi negara-negara Asia Tenggara.…”

Section: Zon Protrachyceras (Subzon Regoledanus)unclassified

“…Skala piawai ammonoid rantau paleogeografi Tethys yang dibangunkan oleh Mietto & Manfrin (1995) adalah berdasarkan persampelan lapisan demi lapisan fosil ammonoid di beberapa bahagian pada singkapan batuan di Southern Alps, Itali dan hasil pengkorelasian dengan beberapa buah negara yang mempunyai singkapan batuan dari lembangan pengenapan sedimen rantau Tethys seperti Iran, China, Austria, Hungary, Greece dan Turki. Skala piawai ammonoid ini telah dibina oleh Mietto dan Manfrin (1995) berasaskan peraturan hirarki yang ketat.…”

Section: Zon Protrachyceras (Subzon Regoledanus)unclassified

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Middle Triassic ammonoid fossils from Aring, Kelantan, Malaysia

Othman¹,

Malaysia²,

Leman³

2010

BGSM

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Abstrak-Sebanyak 13 spesies fosil ammonoid berusia Trias Tengah telah ditemui dari dua singkapan batuan sedimen Formasi Telong. Singkapan-singkapan ini terletak dalam Felda Aring 5, di sepanjang jalanraya yang menghubungi Bandar Gua Musang dan Kuala Berang. Lokaliti-lokaliti ini mengandungi dua himpunan ammonoid yang boleh dikorelasikan dengan Zon Ammonoid Piawai bagi rantau Tethys. Lokaliti QZ480 mengandungi empat spesies ammonoid iaitu Balatonites cf. B. balatonicus, Danubites kansa, Kellnerites samneuensis, Hollandites sp. dan Acrocordiceras sp., manakala lokaliti QZ467 pula mengandungi lapan spesies iaitu Frankites regoledanus, Frankites apertus, Celtites epolensis, Clionitites sp., Protrachyceras costulatum, Anolcites sp., Joannites sp. dan Megaphyllites jarbas. Secara biostratigrafinya, himpunan ammonoid lokaliti QZ480 mencirikan Subzon Balatonicus bagi Zon Balatonites yang berusia Anisian tengah manakala himpunan ammonoid lokaliti QZ467 pula mencirikan Subzon Regoledanus bagi Zon Protrachyceras yang berusia akhir Ladinian. Berdasarkan korelasi, kajian ini menyokong idea yang menyatakan bahawa kawasan kajian yang boleh dikorelasikan dengan Lembangan Trias Lampang-Phrae terletak dalam Terain Sukhothai dalam Blok Shan-Thai kepunyaan mandala Cathaysian. Himpunan-himpunan fosil ammonoid ini mempunyai nilai warisan saintifik yang tinggi khususnya dalam peranannya sebagai penanda usia yang baik pada zaman Trias.Abstract-Some 13 species of Middle Triassic ammonoid fossils were discovered from two outcrops of sedimentary rocks belonging to the Telong Formation. The outcrops are located within the Felda Aring 5, along the road connecting Gua Musang Town and Kuala Berang. These two localities contained two ammonoid assemblages that are correlatable with the Standard Ammonoid Zone of the Tethyan region. Locality QZ480 contains four ammonoid species i.e. Balatonites cf.

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Reply to comments on: A review of the evolution, biostratigraphy, provincialism and diversity of Middle and early Late Triassic conodonts

Chen¹,

Krystyn

Orchard

et al. 2016

Papers in Palaeontology

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A high resolution Middle Triassic ammonoid standard scale in the Tethys realm; a preliminary report

Cited by 68 publications

References 0 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

Middle Triassic ammonoid fossils from Aring, Kelantan, Malaysia

Reply to comments on: A review of the evolution, biostratigraphy, provincialism and diversity of Middle and early Late Triassic conodonts

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