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The Identity and a New Description of Pteronitella retroflexa (Wahlenberg) from the Upper Silurian of Gotland and the Welsh Borders

 

作者: VictorG. Walmsley,  

 

期刊: Geologiska Föreningen i Stockholm Förhandlingar  （Taylor Available online 1962）
卷期: Volume 84, issue 4  

页码: 351-362

 

ISSN:0016-786X

 

年代: 1962

 

DOI:10.1080/11035896209447302

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Lectotype and paratypes ofPteronitella retroflexa(Wahlenberg) are selected and described, and from comparisons made with Sowerby's figured specimen and other material from the Welsh Borderland, it is concluded that all these forms are conspecific.

 

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