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Leptellina (Leptellina) semilunata
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).
It was recombined as Leptellina (Leptellina) semilunata by Candela and Harper (2014).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Leptellina semilunata Williams p. 164 figs. P1. XV, figs. 23-26 |
| 2014 | Leptellina (Leptellina) semilunata 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) semilunata Williams 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Strongly 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. |
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 | |||||
Age range: base of the Abereiddian to the top of the Costonian or 468.00000 to 457.20000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Abereiddian | United Kingdom (Scotland) | Leptellina semilunata (164926 164929) | |
| Llandeilo | Mongolia | Leptellina semilunata (45985) | |
| Llandeilo | United Kingdom (Scotland) | Leptellina semilunata (164928 164931 164937 164941) | |
| Costonian | United Kingdom (Scotland) | Leptellina semilunata (76076) |