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Lipanorthis santalaurae

Rhynchonellata - Orthida - Plectorthidae

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
YearName and author
2002Lipanorthis santalaurae Benedetto and Carrasco pp. 657 - 658 figs. 6.1-12
2004Lipanorthis santalaurae Harper et al. pp. 276 - 279 figs. 4 A-G; 5 A-J

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderOrthidinaSchuchert and Cooper 1932
superfamilyPlectorthoideaSchuchert and Le Vene 1929
familyPlectorthidaeSchuchert and Le Vene 1929
genusLipanorthis
speciessantalaurae

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.

Diagnosis
ReferenceDiagnosis
J. L. Benedetto and P. A. Carrasco 2002Transversely 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. 2004Suboval 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.