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Petrochus conica
Taxonomy
Anematina conica was named by Tyler (1965). Its type specimen is UMMP 47301, 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 conica by Wagner (2023).
It was recombined as Petrochus conica by Wagner (2023).
Synonymy list
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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 conica Tyler 1965
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. H. Tyler 1965 | Shell small, holotype 7.75 mm. high and 5 mm. wide, with conical profile; spire moderately high; spiral angle about 45 degrees; nucleus unknown; whorl profile very slightly convex between suture and pronounced peripheral angulation; beneath periphery basal profile slightly more convex and less steep; base anomphalus; growth lines equally prosocline above and below peripheral angulation. |
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) | Holopea subconica (24285) | |
| Givetian | USA (Michigan) | Anematina conica (type locality: 85061) |