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Taxonomy
Ogygia murchisoniae was named by Murchison (1839). Its type specimen is GSM 18988, a cephalon/head, and it is a 3D body fossil. Its type locality is Road cut at Roman Rd., Pensarn, which is in a Moridunian offshore mudstone in the Ogof Hen Formation of the United Kingdom.
It was recombined as Stygina murchisoniae by Morris (1854); it was recombined as Ogygiocaris murchisoniae by Whittard (1964); it was recombined as Megalaspidella murchisoniae by Bates (1969); it was recombined as Merlinia murchisoniae by Fortey and Owens (1978).
It was recombined as Stygina murchisoniae by Morris (1854); it was recombined as Ogygiocaris murchisoniae by Whittard (1964); it was recombined as Megalaspidella murchisoniae by Bates (1969); it was recombined as Merlinia murchisoniae by Fortey and Owens (1978).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1839 | Ogygia murchisoniae Murchison p. 664 figs. pl. 25, figs 3a-b |
| 1854 | Stygina murchisoniae Morris p. 115 |
| 1873 | Niobe menapiensis Hicks p. 46 figs. pl. 4, figs 1-9. |
| 1873 | Niobe solvensis Hicks p. 47 figs. pl. 4, figs 10-16 |
| 1873 | Asaphus menapiae Salter p. 23 |
| 1896 | Asaphellus solvensis Brøgger pp. 206, 210 |
| 1964 | Ogygiocaris murchisoniae Whittard p. 238 figs. pl. 38, figs 5-11, ? pi. 35, fig. 5 |
| 1969 | Megalaspidella murchisoniae Bates p. 17 figs. pl. 6, figs 1-6; pi. 7, figs 1-9; pi. 8, figs 1, 2, 5. (Murchison) Bates: 17; pi. 6, figs 1-6; pi. 7 |
| 1978 | Merlinia murchisoniae Fortey and Owens pp. 276 - 280 figs. Fig. 10D; PI. 9, fig. 8; PI. 10, figs 1-10; PI. 11, fig. 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.
†Merlinia murchisoniae Murchison 1839
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Invalid names: Merlinia menapiensis Hicks 1873 [synonym], Merlinia solvensis Hicks 1873 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. A. Fortey and R. M. Owens 1978 | Cephalic doublure and eye position like M. major; glabella apparently lacking terrace lines on frontal lobe, which is more expanded than in other species; cranidial section of lateral border furrow very short; palpebral lobes shortest in genus; hypostoma with fine terrace lines, sparser and less backwardly-bowed than on other species, posterior margin non-acuminate; pygidial doublure broad, with inner margin parallel to posterior pygidial margin. |
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009, Hendy et al. 2009 | |||||
Age range: base of the Moridunian to the top of the Whitlandian or 477.70000 to 470.70000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Moridunian | United Kingdom (Wales) | Merlinia murchisoniae (3682 87601) Ogygia murchisoniae (type locality: 89323) | |
| Whitlandian | United Kingdom (Wales) | Megalaspidella murchisoniae (3713 3714 166753) |