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Nothorthis tarda lata

Rhynchonellata - Orthida - Archaeorthidae

Taxonomy
Nothorthis tarda lata was named by Williams (1962). Its type specimen is BB.25918, a shell (Complete shell), and it is a 3D body fossil.

Synonymy list
YearName and author
1962Nothorthis tarda lata Williams p. 101 figs. Pl. VIII, figs. 15-19

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
RankNameAuthor
classRhynchonellataWilliams et al. 1996
orderOrthidaSchuchert and Cooper 1932
suborderOrthidinaSchuchert and Cooper 1932
superfamilyOrthoideaWoodward 1852
familyArchaeorthidae
genusNothorthisUlrich and Cooper 1938
speciestarda
subspecieslata

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
A. Williams 1962Subrectangular, unequally biconvex Nothorthis with a subcarinate pedicle valve just over one-third as deep as wide and a gently convex, broadly sulcate brachial valve just over three-fifths as long as wide; costellate ornamentation fine, commonly with 6 angular costellae per millimetre antero-medianly; teeth small, supported by receding dental lamellae, ventral muscle-scar squat, no more than three-fifths as long as wide and extending anteriorly for just over one-fifth the length of the pedicle valve, adductor scar very broad; notothyrial platform and brachiophore bases well developed, cardinal process absent or represented by an indistinct septum on the notothyrial floor, adductor scars reniform, strongly inlpressed and extending forward on either side of a wide median ridge for just over one-half the length of the valve.