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Taxonomic reassessment of the ichnogenusbeaconichnusand additional examples from the Carboniferous of Kansas, U.S.A.

 

作者: LuisA. Buatois,   M. Gabriela Mángano,   ChristopherG. Maples,   WilliamP. Lanier,  

 

期刊: Ichnos  (Taylor Available online 1998)
卷期: Volume 5, issue 4  

页码: 287-302

 

ISSN:1042-0940

 

年代: 1998

 

DOI:10.1080/10420949809386427

 

出版商: Taylor & Francis Group

 

关键词: Arthropod Trace Fossils;Ichnotaxonomy;Carboniferous;Kansas

 

数据来源: Taylor

 

摘要:

The ichnogenusBeaconichnus(Gevers 1973), an arthropod trace fossil, includes very different forms that comprise five ichnospecies, namely B.darwi‐nunt(Gevers 1971),B. gouldi(Gevers 1971),B. ahtarcticum(Gevers 1971),B. giganteumGevers and Twomey 1982, andB. wrrightiGevers and Twomey 1982. The original diagnosis ofBeaconichnusis rather vague and potentially may accomodate virtually every arthropod trackway described from the fossil record. In view of these problems, the validity ofBeaconichnusis reassessed and each of its ichnospecies is reviewed. We conclude that B.darwinumis a junior synonym ofDiplopodichnus biformisBrady 1947; B.antarcticumshould be regarded asPalmich‐niunt antarcticum;andB. wrightiis anomen nudum.Additionally, we agree with previous proposals in considering B.gouldias the senior synonym of B.giganteum, and including it inDiplichnitesDawson 1873. Therefore, we suggest that the ichnogenusBeaconichnusis best disregarded. Additionally, we describe specimens collected from the Late Carboniferous Tonganoxie Sandstone Member (Stranger Formation) of eastern Kansas, ascribed herein toDiplopodichnus biformisandDiplichnites gouldi, which include examples of intergradations between both ichnotaxa, and provide synonymy lists for both ichnospecies.

 

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