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Cliftonia (Cliftonia) lamellosa

Strophomenata - Orthotetida - Triplesiidae

Taxonomy
Cliftonia (Cliftonia) lamellosa was named by Williams (1951) [= Atrypa imbricata Reed 1905, p. 451, pl. xxiii, fig. 16.]. Its type specimen is SM. A30211a+b, a valve, and it is a 3D body fossil.

It was synonymized subjectively with Cliftonia psittacina by Cocks and Price (1975); it was recombined as Cliftonia lamellosa by Cocks (2014).

Synonymy list
YearName and author
1951Cliftonia (Cliftonia) lamellosa Williams p. 105 figs. pl. 5 f. 12-15
2014Cliftonia lamellosa Cocks pp. 42 - 44 fig. 12N

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderOrthotetidaWaagen 1884
suborderTriplesiidinaMoore 1952
superfamilyTriplesioideaSchuchert 1913
familyTriplesiidaeSchuchert 1913
genusCliftoniaFoerste 1909
subgenusCliftoniaFoerste 1909
specieslamellosa

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.

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Diagnosis
ReferenceDiagnosis
A. Williams 1951Exterior.--Subquadrate, unequally biconvex, the dorsal valve more so than the ventral, accentuated by the very strong median dorsal fold and the complementary ventral sulcus ; ornamented by 28 costae and strongly developed concentric lamellae. Delthyrium closed except apically by a deltidium bearing a median, acutely triangular fold.

Ventral interior.--Teeth widely set, simple, supported by short but strong dental plates. Muscle scars obscure. Plug of the apical foramen preserved as a short curved rod situated at the apical end of the umbo.

Dorsal interior.--Notothyrial platform absent, cardinal process massive, forked ; brachial processes well developed, divergent ; teeth sockets small. Adductor muscle scar rather obscure except for the curved antero-lateral ridges of the posterior adductors.