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Leptellina (Leptellina) semilunata

Strophomenata - Strophomenida - Leptellinidae

Taxonomy
Leptellina semilunata was named by Williams (1962). Its type specimen is BB.26034, a shell, and it is a 3D body fossil. Its type locality is South-east side of quarry, ½ mile north-east of Brockloch Farm, which is in a Llandeilo carbonate mudstone/limestone in the Stinchar Formation of the United Kingdom.

It was recombined as Leptellina (Leptellina) semilunata by Candela and Harper (2014).

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1962Leptellina semilunata Williams p. 164 figs. P1. XV, figs. 23-26
2014Leptellina (Leptellina) semilunata Candela and Harper pp. Supplement 1

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
Lophophorata
phylumBrachiopodaCuvier 1805
subphylumRhynchonelliformeaWilliams et al. 1996
RankNameAuthor
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyPlectambonitoideaJones 1928
familyLeptellinidaeUlrich and Cooper 1936
subfamilyLeptellininaeUlrich and Cooper 1936
genusLeptellinaUlrich and Cooper 1936
subgenusLeptellinaUlrich and Cooper 1936
speciessemilunata()

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 1962Strongly concavo-convex and semi-elliptical Leptellina with the pedicle valves nearly onehalf as deep as long and two-thirds as long as wide; ornamentation finely parvicostellate with a modal count of 9 or 10 costellae per millimetre antero-medianly and 5 strongly accentuated costae conspicuous umbonally, concentric lamellae rarely and distantly developed; lophophore platform almost three-fifths as long as wide and averaging one-half the length of the brachial valve; ventral muscle-scar subtriangular, over one-fifth as long as the pedicle valve.