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Murchisonia subulata
Taxonomy
Loxonema subulata was named by Conrad (1842). It is not extant. Its type locality is river bed immediately downstream from the Four Mile Dam on Thunder Bay River, which is in a Givetian carbonate limestone in the Four Mile Dam Formation of Michigan.
It was recombined as Murchisonia subulata by Hall (1852); it was recombined as Holopella subulata by Foerste (1893); it was recombined as Hormotoma subulata by Foerste (1923), Northrop (1939) and Wagner (2023).
It was recombined as Murchisonia subulata by Hall (1852); it was recombined as Holopella subulata by Foerste (1893); it was recombined as Hormotoma subulata by Foerste (1923), Northrop (1939) and Wagner (2023).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1842 | Loxonema subulata Conrad |
| 1852 | Murchisonia subulata Hall pp. 91 - 92 figs. pl. 28 f. 7a-d |
| 1866 | Loxonema subulata Winchell and Marcy p. 83 |
| 1893 | Holopella subulata Foerste p. 556 figs. pl. 30 f. 21 |
| 1923 | Hormotoma subulata Foerste pp. 81 - 82 |
| 1939 | Hormotoma subulata Northrop pp. 209 - 210 |
| 2023 | Hormotoma subulata Wagner p. S1581 |
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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.
†Murchisonia subulata Conrad 1842
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, o = order | |||||
| References: Hendy 2009, Bambach et al. 2007 | |||||
Age range: base of the Rhuddanian to the top of the Wenlock or 443.40000 to 427.40000 Ma
Collections (26 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Rhuddanian | Canada (Ontario) | Hormotoma subulata (447 173184 173185 173218 173222) | |
| Rhuddanian | Canada (Québec) | Hormotoma subulata (172904 172905) | |
| Alexandrian | USA (Ohio) | Loxonema subulata (172895) | |
| Llandovery | USA (Indiana) | Hormotoma subulata (13291) | |
| Llandovery | Canada (Ontario) | Hormotoma sp. (444 446) | |
| Llandovery | USA (New York) | Hormotoma sp. (443 445) Hormotoma subulata (77051 77052 77054 77081) | |
| Aeronian | USA (New York) | Hormotoma subulata (81833 81865 81869) | |
| Aeronian - Telychian | USA (Georgia) | Hormotoma subulata (164677) | |
| Telychian | USA (New York) | Hormotoma subulata (77053 81909 82554 83097) | |
| Wenlock | USA (New York) | Hormotoma subulata (81813) |