Palaeogene

Most authors continue to regard all Palaeogene 'didelphids' (alphadontids, peradectines and herpetotheriines) as didelphimorphians, and hence as crown-group marsupials, but I'm not aware of any recent phylogenetic studies on the phylogenetic position of these groups (at least, not without checking the literature).

More on phorusrhacids: the biggest, the fastest, the mostest out-of-placest Darren Naish 2006

Bijl PK, et al. (2009) Early Palaeogene temperature evolution of the southwest Pacific Ocean.

Watts Up With That? Anthony Watts 2010

See esp. the paragraph beginning: "During the early Palaeogene …" which pointedly ends with the exemplary and modest statement: "The nature of the triggering remains unknown."

RealClimate Completely Fed Up 2010

Using palaeogeographic reconstructions and palaeo-oceanographic modelling, we find that strong surface currents flowed from northeast Mozambique and Tanzania eastward towards Madagascar during the Palaeogene period, exactly as required by the

Naturejobs - All Jobs 2010

Using palaeogeographic reconstructions and palaeo-oceanographic modelling, we find that strong surface currents flowed from northeast Mozambique and Tanzania eastward towards Madagascar during the Palaeogene period, exactly as required by the

Naturejobs - All Jobs Jason R. Ali 2010

The sudden appearance of anatomically modern pleuronectiform groups in the Palaeogene period matches the pattern repeated by many acanthomorph clades.

Evolution News & Views 2009

The sudden appearance of anatomically modern pleuronectiform groups in the Palaeogene period matches the pattern repeated by many acanthomorph clades.

Evolution News & Views 2009

It’s also been noted that lagomorphs possess similarities with the pantodonts and dinoceratans of the Palaeogene.

Archive 2006-05-01 Darren Naish 2006

Furthermore, while Fox et al. (1992) were careful to exclude other possible contenders (including crocodyliforms, pterosaurs, lizards, xenarthrans and mesonychians) there were a number of Palaeogene mammal groups that they didn’t exclude, and it would have been more convincing had it been shown that these taxa could also be eliminated from comparison (H. - D. Sues, pers. comm.).

Archive 2006-05-01 Darren Naish 2006