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Leptellina (Leptellina) rhacta
Taxonomy
Leptellina rhacta was named by Williams (1962). Its type specimen is BB.26031, a shell (complete 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) rhacta by Candela and Harper (2014).
It was recombined as Leptellina (Leptellina) rhacta by Candela and Harper (2014).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Leptellina rhacta Williams p. 164 figs. Pl. XV, figs. 17-19, 21, 22 |
| 2014 | Leptellina (Leptellina) rhacta Candela and Harper pp. Supplement 1 |
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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.
†Leptellina (Leptellina) rhacta Williams 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Highly concavo-convex and subquadrate Leptellina with the pedicle valves almost threefifths as deep as long and nearly three-quarters as long as wide, dome-like in transverse profile with steeply sloping sides; ornamentation finely parvicosteUate with a modal count of 11 costellae per millimetre antero-medianly and 5 strongly accentuated costae conspicuous umbonaUy, concentric lamellae excessively developed in irregular bands except for the shell surface within 3 mm. of the umbo; lophophore platform well defined, over one-half as long as wide and almost three-fifths as long as the brachial valve; ventral muscle-scar subtriangular, about one-quarter as long as the pedicle valve. |
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013, Hendy 2009 | |||||