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Argillomys marylandensis
Taxonomy
Argillomys marylandensis was named by Cifelli et al. (2013) [ZOOBANK LSID.: urn:lsid:zoobank.org:act:63737680-0649-4300-B119-7D026AE3E0F0]. It is a 3D body fossil. Its type locality is Cherokee-Sanford Brick Clay Pit (USNM Loc. 41614, 41615), which is in an Aptian wet floodplain claystone/claystone in the Arundel Clay Formation of Maryland. It is the type species of Argillomys.
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Argillomys marylandensis Cifelli et al. p. 316 fig. 1 |
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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.
†Argillomys marylandensis Cifelli et al. 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. L. Cifelli et al. 2013 | M2 with enamel ornamentation, as in Plagiaulacidae, Eobaataridae, and some members of the “Paracimexomys group” (but not Paracimexomys Archibald, 1982 sensu stricto), differing from most of those taxa in lacking pitting and being restricted to ribs and grooves. Distinct from most comparable taxa in presence of a distinct cusp on anterobuccal ridge and four cusps in lingual row. Resemble most Plagiaulacidae and Eobaataridae, but not most Cimolodonta, in the following: cusps of lingual row well individualized (not forming a ridge); cusp bases well separated, with valley floors clearly visible (not developed as narrow, vertically walled grooves); anterior crown margin sigmoidal (not straight). Resembles “Paracimexomys group” and most other Cimolodonta, differing from Eobaataridae and Plagiaulacidae, in separation of anterior rim from first cusp of buccal row. Differs from most comparable taxa in relative enlargement of the second (rather than first) cusp of the buccal row, in great length relative to width (except Ameribaatar Eaton and Cifelli, 2001) and central placement of last cusp in lingual row (except Monobaatar Kielan-Jaworowska et al., 1987, Arginbaatar Kielan-Jaworowska et al., 1987, and Paulchoffatiidae). |
Measurements
No measurements are available
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| Source: o = order, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988, Jenkins and Krause 1983, Hopson 1973 | |||||
Age range: Late/Upper Aptian or 122.46000 to 113.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Aptian | USA (Maryland) | Argillomys marylandensis (type locality: 14376) |