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Dakotamys
Taxonomy
Dakotamys was named by Eaton (1995) [Tedrow and Korth 1997 attempt to "name" this genus for an aplodontid]. It is not extant. Its type is Dakotamys malcolmi.
It was assigned to Multituberculata by Eaton (1995) and McKenna and Bell (1997); to Cimolodonta by Eaton and Cifelli (2001); and to Cimolodonta by Kielan-Jaworowska and Hurum (2001), Kielan-Jaworowska et al. (2004) and Eaton (2009).
It was assigned to Multituberculata by Eaton (1995) and McKenna and Bell (1997); to Cimolodonta by Eaton and Cifelli (2001); and to Cimolodonta by Kielan-Jaworowska and Hurum (2001), Kielan-Jaworowska et al. (2004) and Eaton (2009).
Species
D. malcolmi (type species)
Synonymy list
Year | Name and author |
---|---|
1995 | Dakotamys Eaton |
1997 | Dakotamys McKenna and Bell |
2001 | Dakotamys Eaton and Cifelli p. 496–497 |
2001 | Dakotamys Kielan-Jaworowska and Hurum p. 416 |
2004 | Dakotamys Kielan-Jaworowska et al. pp. 254, 321 fig. 8.36E |
2009 | Dakotamys Eaton |
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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.
Diagnosis
Reference | Diagnosis | |
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J. G. Eaton and R. L. Cifelli 2001 | p4 with lower H:L than in Cedaromys, Paracimexomys or cf. Paracimexomys. First molars with low cusp formulae (m1-4:3; M1- 4-5:4: 1-2); less than cf. Paracimexomys perplexus but similar to Paracimexomys priscus. Short internal row present on M1, unlike Cedaromys or Janumys. Cusps of external and medial rows on M1 offset (not aligned transversely), unlike Cimexomys. Second to first molar length ratios (0.85) less than in Paracimexomys, cf. Paracirnexomys, Janumys, and Cedaromys but greater than in Bryceomys. Differs from Paracimexomys priscus in having strongly ribbed molar cusps, cusp rows on M1 not diverging anteriorly, and central valley on ml straight rather than sinuous. P4s with labial expanded anteroexternal platform, unlike Cedaromys, Bryceomys, and Janumys, and with rate of cusp climb (CR = 0.38) higher than in Janumys but lower than in Cedaromys, Bryceomys, and cf. Paracimexomys perplexus. |
Measurements
No measurements are available
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Source: o = order, c = class, subp = subphylum | |||||
References: Jenkins and Krause 1983, Hopson 1973, Hendy et al. 2009, Carroll 1988 |
Age range: base of the Middle Cenomanian to the top of the Cenomanian or 99.60000 to 93.90000 Ma
Collections (5 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Cenomanian | USA (Utah) | D. malcolmi (14384) | |
Middle Cenomanian | USA (Utah) | D. malcolmi (14387) | |
Middle Cenomanian - Late/Upper Cenomanian | USA (Utah) | D. malcolmi (14383 73433) D. sp., D. malcolmi (14385) |