DISSOCLADELLA? CHAHTORSHIANA RASHIDI &amp; SCHLAGINTWEIT N. SP., A NEW DASYCLADALE (GREEN ALGAE) FROM THE PALEOCENE OF IRAN

Schlagintweit, Félix; Rashidi, Koorosh; Yarahmadzahi, Hamed; Habibimood, Sharam; Amirshahkarmi, Mahnaz; Ahmadi, Hossain; Khokan, Hossain

doi:10.35463/j.apr.2019.02.01

Actapalrom

2019

DOI: 10.35463/j.apr.2019.02.01

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DISSOCLADELLA? CHAHTORSHIANA RASHIDI & SCHLAGINTWEIT N. SP., A NEW DASYCLADALE (GREEN ALGAE) FROM THE PALEOCENE OF IRAN

Félix Schlagintweit¹,

Koorosh Rashidi²,

Hamed Yarahmadzahi³

et al.

Abstract: A new Dasycladale is described as Dissocladella? chahtorshiana Rashidi & Schlagintweit n. sp. from Selandian carbonates of Mount Chah Torsh, Central Iran (type locality). Other occurrence is from the Sistan Suture Zone of Eastern Iran (Selandian?, Thanetian?). The medium-sized taxon displays cylindrical to slightly claviform thalli with a relatively large main axis bearing alternating primaries of variable shape. The latter show either slowly widening towards the distal end or are club-shaped displaying ve… Show more

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Cited by 3 publications

References 17 publications

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Coral fauna across the Cretaceous–Paleogene boundary at Zagros and Sistan Suture zones and Yazd Block of Iran

Baron-Szabo

Schlagintweit²,

Rashidi

2023

Swiss J Palaeontol

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From the upper Maastrichtian (Tarbur Fm.) and Paleocene of Iran, 20 species of scleractinian corals belonging to 17 genera and 14 families, and one species of the octocoral Heliopora are newly recorded. Furthermore, coral species previously described from the upper Maastrichtian Tarbur Fm. and the Paleocene are revised and included in the evaluation, resulting in a total of 37 species from 28 genera belonging to 20 families (including 3 subfamilies) for the Iranian K/Pg-boundary time period. The majority of the taxa (21 out of 37 = 57%) crossed the K/Pg-boundary. The genera Acropora and Stylocoeniella are recorded from strata older than the Paleogene (upper Maastrichtian) for the first time; for Lobopsammia it is the first report from strata older than the Eocene (Selandian‒Thanetian). The vast majority of the coral taxa occurring in both the upper Maastrichtian (Tarbur Fm.) and the Paleocene of Iran have been reported from a variety of both reefal and non-reefal paleoenvironments. On the species level, a slight majority of the corals from the upper Maastrichtian (Tarbur Fm.) are endemic (14 out of 27 species = 52%). In contrast, the vast majority of the Paleocene Iranian corals are cosmopolitan to subcosmopolitan; only 4 taxa are endemic during the Paleocene. While the upper Maastrichtian coral fauna of Iran shows greatest affinities to contemporaneous assemblages of Europe and the Caribbean, the Paleocene coral fauna is most closely related to contemporaneous coral associations of central Asia, Europe, and North America.

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Coral fauna across the Cretaceous–Paleogene boundary at Zagros and Sistan Suture zones and Yazd Block of Iran

Baron-Szabo

Schlagintweit²,

Rashidi

2023

Swiss J Palaeontol

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First Record of Calcareous Green Algae (Dasycladales, Halimedaceae) From the Paleocene Chehel Kaman Formation of North-Eastern Iran (Kopet-Dagh Basin)

Schlagintweit¹,

Rashidi²,

Mosavinia³

2021

Actapalrom

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The micropalaeontological inventory of the shallow-water carbonates of the Paleocene Chehel-Kaman Formation cropping out in the Kopet-Dagh Basin of north-eastern Iran is poorly known. New sampling has evidenced for the first time the occurrence of layers with abundant calcareous green algae including Dasycladales and Halimedaceae. The following dasycladalean taxa have been observed: Jodotella veslensis Morellet & Morellet, Cymopolia cf. mayaense Johnson & Kaska, Neomeris plagnensis Deloffre, Thyrsoporella-Trinocladus, Uteria aff. merienda (Elliott) and Acicularia div. sp. The studied section is devoid of larger benthic foraminifera and can be referred to the middle-upper Paleocene (SBZ 2-4) due to the presence of Rahaghia khorassanica (Rahaghi). Some of the dasycladalean taxa are herein reported for the first time not only from Iran but also the Central Neotethyan realm.

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Acanthochaetetes Fischeri N. Sp. (Coralline Demosponge) From the Upper Paleocene (Thanetian) of Iraq (Kurdistan Region) and Iran (Sistan Suture Zone)

Schlagintweit¹,

Sánchez‐Beristain²,

Daoud³

et al. 2022

Actapalrom

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The new coralline demosponge Acanthochaetetes fischeri n. sp. is described from the upper Paleocene (Thanetian) of Iraq (Kurdistan Region, Khurmala Formation) and Iran (Sistan Suture Zone). The genus Acanthochaetetes Fischer is a long-ranging genus known from the Upper Jurassic (A. foroiuliensis), through Upper Cretaceous (e.g., Coniacian A.? krumbachensis) and Eocene (A. eocenica) to Recent. A. fischeri n. sp. is the first record from the Paleocene following the K-Pg mass-extinction, thereby closing the gap within the Santonian-Eocene interval. It occurs in platform-margin/upper slope depositional settings associated with coralline algae, corals, and echinoids.

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DISSOCLADELLA? CHAHTORSHIANA RASHIDI & SCHLAGINTWEIT N. SP., A NEW DASYCLADALE (GREEN ALGAE) FROM THE PALEOCENE OF IRAN

Cited by 3 publications

References 17 publications

Coral fauna across the Cretaceous–Paleogene boundary at Zagros and Sistan Suture zones and Yazd Block of Iran

Coral fauna across the Cretaceous–Paleogene boundary at Zagros and Sistan Suture zones and Yazd Block of Iran

First Record of Calcareous Green Algae (Dasycladales, Halimedaceae) From the Paleocene Chehel Kaman Formation of North-Eastern Iran (Kopet-Dagh Basin)

Acanthochaetetes Fischeri N. Sp. (Coralline Demosponge) From the Upper Paleocene (Thanetian) of Iraq (Kurdistan Region) and Iran (Sistan Suture Zone)

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