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Valcourea confinis
Taxonomy
Orthis confinis was named by Salter (1849).
It was recombined as Orthis (Heterorthis) confinis by Reed (1917); it was recombined as Valcourea confinis by Williams (1962), Candela and Harper (2014) and Liljeroth et al. (2017).
It was recombined as Orthis (Heterorthis) confinis by Reed (1917); it was recombined as Valcourea confinis by Williams (1962), Candela and Harper (2014) and Liljeroth et al. (2017).
Synonymy list
| Year | Name and author |
|---|---|
| 1848 | Orthis confinis Salter p. 15 figs. pl. i, fig. 4 |
| 1849 | Orthis confinis Salter p. 15 figs. pl. I, fig. 4 |
| 1917 | Orthis (Heterorthis) confinis Reed p. 847 figs. pl. viii, figs. 26-33 |
| 1962 | Valcourea confinis Williams p. 117 figs. Pl. X, figs. 8, 10, 11, 13, 14 |
| 2014 | Valcourea confinis Candela and Harper pp. Supplement 1 |
| 2017 | Valcourea confinis Liljeroth et al. |
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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.
†Valcourea confinis Salter 1849
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Semicircular, convexo-concave Valcourea about three-fifths as long as wide in ventral outline with a sharp, ventral, median fold and complementary dorsal sulcus tending to disappear in adult stages of growth, brachial valve less than one-fifth as deep as wide; costellate ornamentation finely developed, varying from 12 to 19 costellae, most commonly 15, per 5 mm. at the medio-anterior margin, and cancellated by closely spaced, delicate concentric lamellae; ventral muscle-scar long and subflabeUate, more than two-fifths the length of the pedicle valve, and almost as wide as long; ventral pallial sinus pattern saccate; myophore strong, bulbous, trilobed with a high median carina, sockets large, flaring laterally; dorsal adductor field divided by a short median ridge continuous with the cardinal process shaft, rarely deeply impressed, extending anteriorly for less than two-fifths the length of the valve; dorsal pallial sinus pattern pinnate. |
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy 2009, Aberhan et al. 2004, Nesnidal et al. 2013, Hendy et al. 2009 | |||||
Age range: base of the Abereiddian to the top of the Llandeilo or 468.00000 to 458.40000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Abereiddian | United Kingdom (Scotland) | Valcourea confinis (164926) | |
| Abereiddian - Aurelucian | Ireland | Valcourea confinis (188886) | |
| Llandeilo | United Kingdom (Scotland) | Valcourea confinis (164928) |