Late Ordovician (Caradoc-Ashgill) ellesmerocerid Bactroceras latisiphonatum of Irian Jaya and Australia

IF 1.2 4区地球科学 Q3 PALEONTOLOGY

Alcheringa Pub Date : 1995-01-01 DOI:10.1080/03115519508619507

R. E. Crick, Andrew Quarles van Ufford

引用次数: 2

Abstract

An Ordovician nautiloid ellesmerocerid originally described as Irianoceras antiquum (Plectronoceratidae) Kobayashi 1971 from Irian Jaya and assigned a probable age of post Tremadoc is shown to be a member of the Llanvirn ellesmerocerid genus Bactroceras Holm 1878 (Baltoceratidae). Irianoceras antiquum is placed in synonymy with Bactroceras latisiphonatum Glenister 1952 described from New South Wales, Australia. The new material provides a better analysis of the variability of the genotype, extends its geographic range, and documents the presence or former presence of upper Caradoc to lower Ashgill strata in Irian Jaya.

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Irian Jaya和澳大利亚的晚奥陶世（Caradoc Ashgill）ellesmerocerid Bactroceras latitupiatum

在Irian Jaya发现的一条奥陶纪鹦鹉螺，最初被描述为Irianoceras antiquum (plecronoceratidae) Kobayashi(1971)，其年代可能在Tremadoc之后，被证明是Llanvirn ellesmerocerid Bactroceras Holm 1878 (Baltoceratidae)的成员。Irianoceras antium与Bactroceras latisiphonatum Glenister(1952)同义，描述自澳大利亚新南威尔士州。新材料提供了对基因型可变性的更好分析，扩展了其地理范围，并记录了伊里安查亚上卡拉多克到下阿什吉尔地层的存在或以前的存在。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Alcheringa 地学-古生物学

CiteScore

2.60

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： Alcheringa : An Australasian Journal of Palaeontology is the official journal of the Australasian Palaeontologists. Alcheringa covers all aspects of palaeontology and its ramifications into the earth and biological sciences, including: Taxonomy- Biostratigraphy- Micropalaeontology- Vertebrate palaeontology- Palaeobotany- Palynology- Palaeobiology- Palaeoanatomy- Palaeoecology- Biostratinomy- Biogeography- Chronobiology- Biogeochemistry- Palichnology. Review articles are welcome, and may be solicited from time to time. Thematic issues are also possible. Emphasis is placed on high quality and informative illustration, in both line drawings and photographs. Papers of general significance may receive preference over those of more local interest.