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Monotrematum sudamericanum
Taxonomy
Monotrematum sudamericanum was named by Pascual et al. (1992). Its type specimen is MLP 91-I-1-1, a tooth (right M2/), and it is a 3D body fossil. Its type locality is Punta Peligro, which is in a Danian mire/swamp claystone/conglomerate in the Salamanca Formation of Argentina.
Synonymy list
| Year | Name and author |
|---|---|
| 1992 | Monotrematum sudamericanum Pascual et al. p. 4 figs. Fig. 3-4 |
| 2007 | Monotrematum sudamericanum Gelfo et al. |
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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.
†Monotrematum sudamericanum Pascual et al. 1992
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Pascual et al. 1992 | Differs from Steropodon galmani, an early Cretaceous taxon known only from a lower jaw fragment (Archer et al. 1985), in being much larger in all comparable dimensions. Differs from the species of Obdurodon (insignis Woodbume and Tedford, 1975; dicksoni Archer et al., this vol.) in having three rather than two upper molars, a more bulbous anterolingual cusp on M2 and in other aspects of molar morphology detailed below. Differs from Ornithorhynchus anatinus, the living platypus, in having well developed teeth and in most comparable aspects of crown morphology, the molars of Or. anatinus being vestigial. |
Measurements
No measurements are available
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| Source: f = family, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hopson 1973, Hendy et al. 2009, Carroll 1988, Nowak 1991, Luo et al. 2003 | |||||