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Spirographites
Taxonomy
Spirographites was named by Aster (1937) [Sepkoski's age data: T Dani]. It is considered to be a form taxon.
It was assigned to Ichnofossils by Mayoral and Calzada (1998); and to Serpulimorpha by Sepkoski (2002).
It was assigned to Ichnofossils by Mayoral and Calzada (1998); and to Serpulimorpha by Sepkoski (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Spirographites Aster |
| 1998 | Spirographites Mayoral and Calzada |
| 2002 | Spirographites Sepkoski |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Spirographites Aster 1937
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. Mayoral and S. Calzada 1998 | Madrigueras cilindricas verticales a fuertemente inclinadas o casi horizontales,simples o mas raramente seudobifurcadas, de seccion normalmente eliptica, aunque tambien puede ser circular. La pared exterior,ligeramente aglutinante, presenta una ornamentacion
constituida por protuberancias lenticulareso toscamente globosas, asi como marcas de rastrillaje(Gamez-Vintaned y Linan 1996). Ambas se disponen en anillos espirales paralelos y discontinuos. |