Late Givetian ammonoids from Hassi Nebech (Tafilalt Basin, Anti-Atlas, southern Morocco)

IF 1.4 4区地球科学 Q3 Earth and Planetary Sciences

Fossil Record Pub Date : 2013-02-21 DOI:10.1002/mmng.201300001

Jürgen Bockwinkel, R. Thomas Becker, Volker Ebbighausen†

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引用次数: 20

Abstract

The Hassi Nebech area of the SE Tafilalt (Tafilalt Basin, Anti-Atlas, Morocco) yielded the richest and most diverse late Givetian ammonoid fauna on a global scale. Above the distinctive regional “Lower Marker Bed” (Synpharciceras clavilobum Zone), abundant loosely collected limonitic specimens derive from hypoxic shales of the Taouzites taouzensis to Petteroceras errans zones. The ontogenetic morphometry and intraspecific variability of a total of 30 species representing five families, the Acanthoclymeniidae, Taouzitidae, Pharciceratidae, Petteroceratidae, and Tornoceratidae, are documented. New taxa are: Pseudoprobeloceras praecox n. sp., Scaturites minutus n. gen. n. sp., Darkaoceras velox n. sp., Pharciceras decoratum n. sp., Ph. fornix n. sp., Ph. subconstans n. sp., Ph. involutum n. sp., Lunupharciceras incisum n. sp., Transpharciceras procedens n. gen. n. sp., Stenopharciceras progressum n. sp., Pluripharciceras n. gen. (type species: Synpharciceras plurilobatum Petter, 1959), Plu. orbis n. sp., Synpharciceras frequens n. sp., Lobotornoceras bensaidi n. sp., Nebechoceras eccentricum n. gen. n. sp., and Phoenixites lenticulus n. sp.. The documentation of conch and particularly suture ontogeny and intraspecific variability necessitates a revised diagnosis for ten taxa. Manticoceras pontiformis Termier & Termier, 1950, Probeloceras costulatum Petter, 1959, and Pseudoprobeloceras nebechense Bensaïd, 1974 are regarded as subjective junior synonyms of Ps. pernai (Wedekind, 1918). Sandbergeroceras acutum Termier & Termier, 1950 is a subjective synonym of Taouzites taouzensis (Termier & Termier, 1950). Pharciceras applanatum Bensaïd, 1974 is transferred to Extropharciceras. Other forms (Ph. aff. tridens, Ph. cf. subconstans n. sp., Extropharciceras n. sp. 2, Ex. cf. arenicum, Ex. cf. applanatum, Synpharciceras sp., Plu. cf. plurilobatum) are described in open nomenclature. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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摩洛哥南部Anti-Atlas的Tafilalt盆地Hassi Nebech的晚Givetian菊石

摘要Tafilalt东南部的Hassi Nebech地区（摩洛哥Anti-Atlas的Tafilalt盆地）在全球范围内产生了最丰富、最多样的晚吉维期菊石动物群。在独特的区域“下标志层”（Synpharciceras clavilobum带）上方，大量松散收集的褐铁矿标本来自陶兹岩-陶兹岩带至Petteroceras errans带的缺氧页岩。记录了代表五个科的总共30个物种的个体发生形态计量学和种内变异性，这五个科分别是棘齿龙科、陶氏龙科、毒蜥科、小角龙科和龙卷风科。新分类群为：Pseudoprobeloceras praecox n.sp.，Scaturites minutus n.gen.sp.，Darkaoceras velox n.sp.、Pharciceras decoratum n.sp.和Ph.forniax n.sp..、Ph.subcostans n.sp.以及Ph.involutum n.sp.。Lunupharciceras incsum n.sp，Plu。orbis n.sp.、Synpharciceras frequens n.sp.，Lobotoroceras bensaidi n.sp..、Nebecocheras ecricum n.gen.n.sp.和Phoenixites lenticulus n.sp.。对海螺，特别是缝合线个体发生和种内变异的记录需要对10个分类群进行修订诊断。Manticoceras ponticormis Termier&Termier，1950，Probeloceras costulatum Petter，1959和Pseudoprobeloceras nebechense Bensad，1974被认为是Ps.pernai的主观初级同义词（Wedekind，1918）。Sandbergeroceras acute um Termier&Termier，1950是陶兹岩的主观同义词（Termier&Termier，1950）。Pharciceras applanatum Bensad，1974年转让给Extropharciceras。其他形式（Ph.aff.tridens，Ph.cf.subcostans n.sp.，Extropharciceras n.sp.2，Ex.cf.arenicum，Ex.ef.applanatum，Synpharcciceras sp.，Plu.cf.plullobatum）以开放命名法描述。doi:10.1002/mng.201300001

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来源期刊

Fossil Record PALEONTOLOGY-

CiteScore

2.50

自引率

7.10%

发文量

审稿时长

>12 weeks

期刊介绍： Fossil Record (FR) is the palaeontological journal of the Museum für Naturkunde Berlin. This journal was founded in 1998 under the name Mitteilungen aus dem Museum für Naturkunde Berlin, Geowissenschaftliche Reihe and appears with two issues each year. Fossil Record publishes original papers in all areas of palaeontology including the taxonomy and systematics of fossil organisms, biostratigraphy, palaeoecology, and evolution. All taxonomic groups are treated, including invertebrates, microfossils, plants, and vertebrates.