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Rafinesquina insidiosa
Taxonomy
Rafinesquina insidiosa was named by Williams (1962). Its type specimen is BB. 15156, a valve (Internal mould of pedicle valve), and it is a 3D body fossil. Its type locality is 500 yards south-south-east of Glendrissaig Farm, which is in a Burrellian offshore mudstone in the Balclatchie Formation of the United Kingdom.
Sister species lacking formal opinion data
R. beirensis, R. calderi, R. camerata, R. carlottina, R. chosensis, R. corrugata, R. deerensis, R. equipunctata, R. ermani, R. esmondensis, R. fracta, R. hermitagensis, R. holli, R. inaequicostata, R. lennoxensis, R. loxorhytis, R. mediolineata, R. miodeltoidea, R. nitans, R. normalis, R. normaloides, R. obscura, R. occulata, R. okulitchi, R. orleansensis, R. patula, R. pota, R. praedeltoidea, R. pregibbosa, R. prestonensis, R. productiformis, R. pronis, R. quadrata, R. reliqua, R. robusta, R. salmoni, R. sardesoni, R. semicircularis, R. semicircularis, R. squamula, R. varicosa, R. vinicensis, R. vinicensis
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Rafinesquina insidiosa Williams p. 215 figs. P1. XXI, figs. 23, 24, 27 |
| 2014 | Rafinesquina insidiosa 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.
†Rafinesquina insidiosa Williams 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Transversely semi-oval Rafinesquina with a deeply concavo-convex profile due to a rounded geniculation affecting the shell at about 12 mm. from the ventral umbo; radial ornamentation cancellated and consisting of closely spaced costellae, commonly 6 per millimetre antero-medianly, segregated into narrow sectors, about 1 mm. wide, by strongly accentuated costae and costellae; dental lamellae widely divergent, ventral muscle-scar subcircular, slightly wider than long and about one-quarter as long as the pedicle valve; cardinal process lobes small but wide, high with a negligible notothyrial platform and median ridge, socket plates well developed, disposed parallel to the hinge-line. |
Measurements
No measurements are available
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| Source: g = genus, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Burrellian or 456.60000 to 452.50000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burrellian | United Kingdom (Scotland) | Rafinesquina insidiosa (165043 165046) |