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Malleodectidae
Taxonomy
Malleodectidae was named by Archer et al. (2016). Its type is Remingtonocetidae.
It was assigned to Dasyuromorphia by Archer et al. (2016) and Carneiro and Olivero (2017).
It was assigned to Dasyuromorphia by Archer et al. (2016) and Carneiro and Olivero (2017).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Malleodectidae Archer et al. p. 3 |
| 2017 | Malleodectidae Carneiro and Olivero p. 360 |
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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.
Fm. †Malleodectidae Archer et al. 2016
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G. †Gaylordia Paula Couto 1952
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†Gaylordia macrocynodonta Paula Couto 1952
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Invalid names: Xenodelphis doelloi Paula Couto 1962 [synonym]
†Gaylordia mater Oliveira and Goin 2015
†Gaylordia mendesi Paula Couto 1970
Invalid names: Xenodelphis Paula Couto 1962 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Archer et al. 2016 | Medium-sized (~1 kg; see below), durophagous, carnivorously-adapted marsupials that di er from all others in the following combination of features: large, caniniform, laterally compressed C1; narrow, premolariform P1 adpressed against the base of C1; asymmetric P2 with wide, diamond-shaped (in occlusal view) posterior region, posteriorly-sloping crown and low, narrow, attenuated anterior region; uniquely (among known dasyuromorphians) large dP3 (similar in size to M1) with three cusps and a functional postmetacrista; enormous, subrounded, dome-shaped, essentially unicuspid, four-rooted P3 that is wider and longer than M1 and M2 (and probably M3), with (M. moenia) or without (M. mirabilis) a tiny cuspule near the posterior edge of the crown; M1 relatively (compared to M2) hypsodont, longer and wider than M2, with StB and StD directly buccal to the paracone and metacone respectively, StD taller than StB, a deep vertical ssure on the buccal ank of the crown, no anterior ectoloph crest, StE present on posterior ectoloph ridge, poorly-developed straight (M1) centrocrista and no posterior cingulum; M2 more conventionally dasyuromorphian-like with v-shaped centrocrista but with conules better developed than in most undoubted dasyuromorphians. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Clemens 1979, Hopson 1973, Hendy et al. 2009, Lillegraven 1979, Carroll 1988 | |||||
Age range: Early/Lower Eocene or 55.80000 to 48.60000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Eocene | Brazil (Rio de Janeiro) | Gaylordia macrocynodonta, Xenodelphis doelloi, Gaylordia mater (118314) |