Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Arenorthis paranaensis

Rhynchonellata - Orthida - Heterorthidae

Taxonomy
Arenorthis paranaensis was named by Benedetto et al. (2013) [= 1991 Heterorthella freitana (Clarke, 1899) in Boucot et al., p. 513, figs 4–7]. Its type specimen is CEGH-UNC 24447a, a valve (An internal mould of dorsal valve), and it is a 3D body fossil. Its type locality is San Fernando Quarry, which is in a Hirnantian shallow subtidal sandstone/siltstone in the Eusebio Ayala Formation of Paraguay.

Synonymy list
YearName and author
2013Arenorthis paranaensis Benedetto et al. pp. 67 - 70 fig. 5C–W

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderDalmanellidinaMoore 1952
superfamilyDalmanelloideaSchuchert 1913
familyHeterorthidaeSchuchert and Cooper 1931
genusArenorthis
speciesparanaensis

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 et al. 2013Gently ventribiconvex, subcircular shells with fascicostellate ornament of 5–6 costae per 5 mm at anterior margin. Ventral muscle field large, suboval, extending for about 42 per cent valve length. Cardinal process expanded into a prominent, often trilobate myophore occupying the whole notothyrial platform. Thick brachiophores supported by proportionally short bases converging medially towards floor of valve.