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Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Mesodma pygmaea
Taxonomy
Mesodma pygmaea was named by Sloan (1987). Its type locality is Gidley Quarry, which is in a Torrejonian terrestrial horizon in the Fort Union Formation of Montana.
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
---|---|
1987 | Mesodma pygmaea Sloan |
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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.
†Mesodma pygmaea Sloan 1987
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: f = family, subo = suborder, c = class, subp = subphylum | |||||
References: Hopson 1973, Gunnell et al. 1995, Krause 1982, Hendy et al. 2009, Carroll 1988 |
Age range: base of the Ti1 to the top of the Torrejonian or 61.70000 to 60.90000 Ma
Collections (18 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
To2 | Canada (Alberta) | Mesodma pygmaea (14894) | |
Torrejonian | USA (Montana) | Mesodma pygmaea (14874 type locality: 14906) | |
Torrejonian | USA (Wyoming) | Mesodma pygmaea (14896 14912) | |
Torrejonian | USA (Texas) | Mesodma pygmaea (14948) | |
Ti1 | Canada (Alberta) | Mesodma pygmaea (14939) | |
Ti3 | Canada (Alberta) | Mesodma pygmaea (14992) | |
Ti4 | Canada (Saskatchewan) | Mesodma pygmaea (14978) | |
Tiffanian | USA (Montana) | Mesodma pygmaea (15025 15064) | |
Tiffanian | USA (Wyoming) | Mesodma pygmaea (14952 14989 15067) | |
Tiffanian | USA (North Dakota) | Mesodma sp. (14931) | |
Tiffanian | Canada (Alberta) | Mesodma pygmaea (14959 14973 14995) |