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Protodidelphidae
Taxonomy
Protodidelphidae was named by Marshall (1987).
It was assigned to Didelphimorphia by Goin et al. (1998) and Goin et al. (1999); to Marsupialia by Ladaveze and Muizon (2010); and to Ameridelphia by Oliveira and Goin (2011).
It was assigned to Didelphimorphia by Goin et al. (1998) and Goin et al. (1999); to Marsupialia by Ladaveze and Muizon (2010); and to Ameridelphia by Oliveira and Goin (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1987 | Protodidelphidae Marshall |
| 1998 | Protodidelphidae Goin et al. |
| 1999 | Protodidelphidae Goin et al. |
| 2010 | Protodidelphidae Ladaveze and Muizon |
| 2011 | Protodidelphidae Oliveira and Goin |
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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. †Protodidelphidae Marshall 1987
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G. †Guggenheimia Paula Couto 1952
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†Guggenheimia brasiliensis Paula Couto 1952
†Guggenheimia crocheti Oliveira and Goin 2011
†Guggenheimia glykeia Chornogubsky et al. 2023
G. †Periprotodidelphis Oliveira and Goin 2011
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†Periprotodidelphis bergqvistae Oliveira and Goin 2011
G. †Protodidelphis Paula Couto 1952
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†Protodidelphis mastodontoides Marshall 1987
†Protodidelphis vanzolinii Paula Couto 1952
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. J. Goin et al. 1999 | The upper molars have a short preparacrista stopping at
the base of stylar cusp B. The stylar cusp is subequal to the metacone in size and much larger than the paracone; the stylar shelf is not very reduced but filled with stylar cusp bases. The D cusp is also larger than the paracone. Stylar cusps B and D are conical to slightly compressed labial-lingually. The centrocrista is V-shaped and extends labially to the base of stylar cusps B and D. These stylar cusps are relatively close to each other instead of being directly labial to the paracone and metacone, respectively. The protocone is anteriorly positioned so that it is either aligned or close to being aligned with stylar cusp B and the paracone. The protocone is massive but not extended greatly anteroposteriorly, and the length between the protocone and the paracone and metacone is very short (talon length). No conules are present. The lower molars have a protoconid cone that is much larger than the metaconid and paraconid. There is little cresting (pre- and post protocristids) that connects the protoconid to either the paraconid or the metaconid; consequently the notches in each of those cristids are very deep. The paraconid is anteroposteriorly compressed. The talonid is not reduced in length. There is a large conical entoconid that is located very close to the posterior lin- gual corner of the tooth. The preentocristid is very reduced so that the talonid basin is open lingually. The labial surface of the hypoconid is well rounded and the posthypocristid is directed posterolingually and extends just past the midline of the tooth. |