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Petrochus mellaria
Taxonomy
Anematina mellaria was named by Tyler (1965). Its type specimen is YPM 16481, a shell, and it is a 3D body fossil. 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 Petrochus mellaria by Wagner (2023).
It was recombined as Petrochus mellaria by Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Anematina mellaria Tyler pp. 346 – 347 figs. pl. 47 f. 28-29 |
| 1982 | Anematina mellaria Linsley and Kesling p. 1087 figs. pl. 1 f. 29 |
| 1992 | Anematina mellaria Blodgett and Johnson p. 121 |
| 2023 | Petrochus mellaria Wagner p. S703 |
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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.
†Petrochus mellaria Tyler 1965
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. H. Tyler 1965 | Shell small, holotype 6.5 mm. high and 4.75 mm. wide, with moderately high- spired, cyrtoconoid profile; nucleus simple, dextral, and smooth; whorl profile moderately convex between sutures; base anomphalus or minutely phaneromphalus; growth lines steeply prosocline on upper part of whorl, curving to more gently prosocline along periphery and be-coming steeper on base; aperture sub-round, typically without columellar lip or callus; shell material thin. |
Measurements
No measurements are available
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| Source: superf = superfamily, c = class | |||||
| References: Kiessling 2004, Bambach et al. 2007 | |||||
Age range: Givetian or 387.95000 to 382.31000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Devonian | USA (Illinois) | Anematina mellaria (24285) | |
| Givetian | USA (Michigan) | Anematina mellaria (type locality: 85061) |