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Logania scotica
Taxonomy
Thelodus scoticus was named by Traquair (1898). Its type specimen is GSE5996 and is a 3D body fossil. It is the type species of Loganellia, Logania.
It was recombined as Logania scotica by Aldridge and Turner (1975); it was recombined as Logania (Thelodus) scotica by Ritchie (1985); it was recombined as Loganellia scotica by Fredholm (1990), Karatajute-Talima and Marss (2002), Märss and Miller (2004) and Žigaitė and Goujet (2012).
It was recombined as Logania scotica by Aldridge and Turner (1975); it was recombined as Logania (Thelodus) scotica by Ritchie (1985); it was recombined as Loganellia scotica by Fredholm (1990), Karatajute-Talima and Marss (2002), Märss and Miller (2004) and Žigaitė and Goujet (2012).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1898 | Thelodus scoticus Traquair p. 72 |
| 1975 | Logania scotica Aldridge and Turner pp. 419-420 figs. pl. 1, figs 1-3, 7-9 |
| 1985 | Logania (Thelodus) scotica Ritchie |
| 1990 | Loganellia scotica Fredholm |
| 2002 | Loganellia scotica Karatajute-Talima and Marss p. 408 |
| 2004 | Loganellia scotica Märss and Miller |
| 2012 | Loganellia scotica Žigaitė and Goujet pp. 259 - 264 figs. 3-7 |
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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.
†Logania scotica Traquair 1898
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| Z. Žigaitė and D. Goujet 2012 | (modified after Märss et al. 2007): medium to large thelodonts with fusiform body, with dorsoventrally flattened anterior part, and strongly rounded rostral part. The scale cover is comparatively uniform. Postpectoral and precaudal scales are elongate, wedge-shaped, elliptical and sometimes carinate; raised median rhombic area of the crown is common; base tending to bulge anteriorly in older scales and an anterior process is common. The pulp cavity is deep and open in young scales, reduced to a slit-like groove in older scales, which leads to a single pulp canal opening being located at the distal end of the scale. Possess specialized branchial denticles. |
Measurements
No measurements are available
No ecological data are available
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Telychian | United Kingdom (South Lanarkshire) | Logania scotica (237854) | |
| Telychian - Sheinwoodian | United Kingdom (South Lanarkshire) | Thelodus scoticus (195126) | |
| Ludlow | United Kingdom (Scotland) | Thelodus scoticus (26896) | |
| Lochkovian - Pragian | Ukraine | Thelodus scoticus (23447) |