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Lesserorthis

Rhynchonellata - Orthida - Euorthisinidae

Taxonomy
Lesserorthis was named by Benedetto (2007). Its type is Lesserorthis havliceki.

It was assigned to Euorthisinidae by Benedetto (2007).

Synonymy list
YearName and author
2007Lesserorthis Benedetto p. 271

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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
familyEuorthisinidaeHavlicek 1977
genusLesserorthis

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 2007Medium-sized, subequally biconvex shells with finely multicostellate ornament. Ventral muscle field suboval, bounded by conspicuous ridges. Strongly diverging brachiophores supported by bladelike bases which in juvenile specimens unite medially to form narrow V-shaped septalium; in mature specimens brachiophore bases merged with sides of median ridge, becoming approximately parallel to each other and delimiting small U-shaped notothyrial chamber. Cardinal process absent. Dorsal median ridge short and broad in adult specimens.