Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Micropternodus borealis
Taxonomy
Micropternodus borealis was named by Matthew (1903). Its type specimen is AMNH 9602, a mandible (a lower jaw with p3-m3 and alveoli of the anterior teeth), and it is a 3D body fossil. Its type locality is Pipestone Springs, which is in a Chadronian terrestrial claystone in the Renova Formation of Montana. It is the type species of Micropternodus.
Synonymy list
Year | Name and author |
---|---|
1903 | Micropternodus borealis Matthew p. 204 fig. 3 |
1930 | Micropternodus borealis Hay p. 427 |
2022 | Micropternodus borealis Korth et al. |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Micropternodus borealis Matthew 1903
show all | hide all
Diagnosis
Reference | Diagnosis | |
---|---|---|
W. D. Matthew 1903 | Dentition /3.1.3.3. Molars somewhat like those of Centetes in composition, with high trigonid and small, low talonid. Trigonid very wide transversely with prd considerably overtopping pad and med. Talonid with sharp posterior margin and low median ridge. Molars and especially premolars, short, high, and recurved; p4 sub-molariform, with small anterior and internal trigonid cusps and strong basal heel. P1 much smaller and simpler, with small heel and no other accessory cusps. P2 is small and one-rooted, canine small, incisors small, subequal. No diastemata except a slight one behind p2. Jaw rather deep in front. Second molar slightly larger than the first, third much smaller. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
Source: subc = subclass, c = class, subp = subphylum | |||||
References: Lillegraven 1979, Ji et al. 2002, Carroll 1988, Hendy et al. 2009 |
Age range: Early/Lower Chadronian or 37.20000 to 33.90000 Ma
Collections (12 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Chadronian | USA (Montana) | Micropternodus borealis (16959 16988 type locality: 17010) | |
Chadronian | USA (Nebraska) | Micropternodus borealis (16917 16940 16941 17014) | |
Chadronian | USA (Wyoming) | Micropternodus sp. (16920) | |
Chadronian | USA (North Dakota) | Micropternodus borealis (16991) | |
Early/Lower Chadronian | USA (Montana) | Micropternodus borealis (27245) | |
Late/Upper Chadronian | USA (Montana) | Micropternodus borealis (17027) | |
Late/Upper Chadronian - Orellan | USA (Nebraska) | Micropternodus borealis (230806) |