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Lipanorthis santalaurae
Taxonomy
Lipanorthis santalaurae was named by Benedetto and Carrasco (2002). Its type specimen is CEGH–UNC 20481a, a valve (External and internal molds of a dorsal valve), and it is a 3D body fossil. Its type locality is Abra de Santa Laura F-2, Sierra de Mojotoro, Floresta Formation, Jujuy, which is in a Tremadoc coastal sandstone/siltstone in the Floresta Formation of Argentina.
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Lipanorthis santalaurae Benedetto and Carrasco pp. 657 - 658 figs. 6.1-12 |
| 2004 | Lipanorthis santalaurae Harper et al. pp. 276 - 279 figs. 4 A-G; 5 A-J |
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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.
†Lipanorthis santalaurae Benedetto and Carrasco 2002
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. L. Benedetto and P. A. Carrasco 2002 | Transversely suboval shells with average length/width ratio 0.77 (dorsal valve) and 0.82 (ventral valve). Finely multicostellate ornament numbering 10–11 costellae per 2 mm. Ventral muscle field relatively large and narrow, rounded anteriorly, bounded by dental plates diverging anteriorly 40–50°. Notothyrial chamber extending anteriorly for about 13% of valve length, bearing a thick, ridge-like cardinal process. | |
| D. A. T. Harper et al. 2004 | Suboval Lipanorthis species with hinge line 65±85 % as wide as maximum width, ventral valve 78±93% as long as wide, dorsal valve 77±86% as long as wide, bilobed ventral muscle field 27±40% as long as valve, septalium 11±16% as long as valve, and multicostellate ornament of 8±11 ribs per 2 mm. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy 2009, Aberhan et al. 2004, Nesnidal et al. 2013 | |||||