Pleurotomariida (Gastropoda) from the upper Anisian platform carbonates of the Dolomites (Southern Alps, Italy): systematics, palaeobiogeography and Triassic recovery

IF 2.3 2区地球科学 Q1 PALEONTOLOGY

Papers in Palaeontology Pub Date : 2024-03-04 DOI:10.1002/spp2.1545

Stefano Monari, Elio Dellantonio

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Abstract

A very rich gastropod fauna from the upper Anisian (Nevadites secedensis Zone) platform carbonates of the Dolomites, represented by more than 200 species, was collected over recent decades. Its study contributes to a better understanding of the dynamics of the recovery after the end-Permian mass extinction. This paper deals with the Pleurotomariida. A total of 35 species, 22 genera and 9 families have been identified. Of these, 12 species and 7 genera are new, namely Rufilla wilckensi sp. nov., Rufilla giacomellii sp. nov., Viezzenella ruvida gen. et sp. nov., Temnotropis maestroettorei sp. nov., Cancellotomaria boninsegnai sp. nov., Stuorella crenulata sp. nov., Codinella? fontanai sp. nov., Fiacconella pericincta gen. et sp. nov., Fiemmespira gen. nov., Texturaspira gen. nov., Nodocingulum ogilvieae sp. nov., Dimorphotomaria fassaensis gen. et sp. nov., Moenaspira crassa gen. et sp. nov. and Predazzella elongata gen. et sp. nov. Comparison with the gastropod fauna of the St Cassian Formation indicates that, from the late Anisian to the Carnian, in the Dolomites the richness of the Pleurotomariida increased by 54% at species level, 26% at genus level and 22% at family level. A comprehensive palaeobiogeographical analysis highlights a very high degree of endemism: 90% of the species are exclusive to single palaeogeographical units. This suggests that species diversification at a strict local scale was a major feature of the Middle Triassic phase of recovery of the Pleurotomariida. Seemingly, the non-planktotrophic development of this group combined with a patchy resurgence of the carbonate platforms played an important role in hampering dispersal.

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白云岩（意大利南阿尔卑斯山）上安息年地台碳酸盐岩中的Pleurotomariida（腹足纲）：系统学、古生物地理学和三叠纪的恢复

近几十年来，从白云石上安息年（Nevadites secedensis 区）地台碳酸盐岩中采集到了非常丰富的腹足动物群，其中有 200 多个物种。对它们的研究有助于更好地了解二叠纪末大灭绝后的恢复动态。本文研究的是 Pleurotomariida。共鉴定出 35 种、22 属和 9 科。其中 12 种 7 属为新种，即 Rufilla wilckensi sp、Codinella? fontanai sp.与圣卡西亚地层腹足类动物群的比较表明，从晚安尼西纪到卡尼安纪，多洛米蒂地区的Pleurotomariida物种丰富度增加了54%，属丰富度增加了26%，科丰富度增加了22%。一项全面的古生物地理分析表明，多洛米蒂地区具有极高的地方特有性：90%的物种为单一古地理单元所独有。这表明，在严格的地方尺度上的物种多样化是中三叠世褶纹目恢复阶段的一个主要特征。看来，该类群的非浮游生物发展与碳酸盐平台的零星恢复在阻碍扩散方面发挥了重要作用。

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来源期刊

Papers in Palaeontology PALEONTOLOGY-

CiteScore

4.50

自引率

4.30%

发文量

期刊介绍： Papers in Palaeontology is the successor to Special Papers in Palaeontology and a journal of the Palaeontological Association (www.palass.org). The journal is devoted to the publication of papers that document the diversity of past life and its distribution in time and space. Papers in Palaeontology is devoted to the publication of papers that document the diversity of past life and its distribution in time and space. As a sister publication to Palaeontology its focus is on descriptive research, including the descriptions of new taxa, systematic revisions of higher taxa, detailed biostratigraphical and biogeographical documentation, and descriptions of floras and faunas from specific localities or regions. Most contributions are expected to be less than 30 pp long but longer contributions will be considered if the material merits it, including single topic parts. The journal publishes a wide variety of papers on palaeontological topics covering: palaeozoology, palaeobotany, systematic studies, palaeoecology, micropalaeontology, palaeobiogeography, functional morphology, stratigraphy, taxonomy, taphonomy, palaeoenvironmental reconstruction, palaeoclimate analysis, biomineralization studies.