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Lotheridium, new metatherian mammal from Upper Cretaceous of China (free pdf)
A new paper in PeerJ:
Shundong Bi, Xingsheng Jin, Shuo Li & Tianming Du (2015)
A new Cretaceous Metatherian mammal from Henan, China.
We report a new deltatheroidan mammal from the Upper Cretaceous of
Henna, China. The new taxon, Lotheridium mengi, is based on a nearly
complete skull and associated lower jaws with full adult dentition.
Deltatheroidans are known mostly from fragmentary specimens from Asia
and North America. Previous views on deltatheroidan relationships were
diverse, but recent studies favored their metatherian affinity. The
new specimen represents the most complete skull known for
deltatheroidans and provides additional evidence that deltatheroidans
already had the distinctive metatherian dental formula and replacement
pattern and several other derived metatherian features, supporting the
metatherian status for this clade. The new species also indicates that
deltatheroidan mammals were more diverse and had broader geographical
distributions than previously thought.