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A new Cretaceous Metatherian mammal from Henan, China.

Bi S, Jin X, Li S, Du T - PeerJ (2015)

Bottom Line: The new taxon, Lotheridium mengi, is based on a nearly complete skull and associated lower jaws with full adult dentition.Previous views on deltatheroidan relationships were diverse, but recent studies favored their metatherian affinity.The new species also indicates that deltatheroidan mammals were more diverse and had broader geographical distributions than previously thought.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences , Beijing , China ; Department of Biology, Indiana University of Pennsylvania , Indiana, PA , United States of America.

ABSTRACT
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.

No MeSH data available.


The most parsimonious tree generated from the phylogenetic analyses from this paper.The cladistics analysis is based on 46 taxa and 156 craniodental characters.
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fig-5: The most parsimonious tree generated from the phylogenetic analyses from this paper.The cladistics analysis is based on 46 taxa and 156 craniodental characters.

Mentions: We performed a ratchet search under New Technology menu of TNT (version 1. 1 by Pablo Goloboff, Steve Farris, and Kevin Nixon). We followed Rougier, Davis & Novacek (2015) in designating 11 multiple state characters as ordered (1, 4, 7, 12, 14, 35, 36, 50, 51, 52, 116); the remaining characters were unordered. The analysis generated only one most parsimonious tree (Fig. 5) with a tree length of 559 steps, a consistency index of 0.37, and a retention index of 0.67.


A new Cretaceous Metatherian mammal from Henan, China.

Bi S, Jin X, Li S, Du T - PeerJ (2015)

The most parsimonious tree generated from the phylogenetic analyses from this paper.The cladistics analysis is based on 46 taxa and 156 craniodental characters.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4400878&req=5

fig-5: The most parsimonious tree generated from the phylogenetic analyses from this paper.The cladistics analysis is based on 46 taxa and 156 craniodental characters.
Mentions: We performed a ratchet search under New Technology menu of TNT (version 1. 1 by Pablo Goloboff, Steve Farris, and Kevin Nixon). We followed Rougier, Davis & Novacek (2015) in designating 11 multiple state characters as ordered (1, 4, 7, 12, 14, 35, 36, 50, 51, 52, 116); the remaining characters were unordered. The analysis generated only one most parsimonious tree (Fig. 5) with a tree length of 559 steps, a consistency index of 0.37, and a retention index of 0.67.

Bottom Line: The new taxon, Lotheridium mengi, is based on a nearly complete skull and associated lower jaws with full adult dentition.Previous views on deltatheroidan relationships were diverse, but recent studies favored their metatherian affinity.The new species also indicates that deltatheroidan mammals were more diverse and had broader geographical distributions than previously thought.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences , Beijing , China ; Department of Biology, Indiana University of Pennsylvania , Indiana, PA , United States of America.

ABSTRACT
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.

No MeSH data available.