Neither a rodent nor a platypus : a reexamination of Necrolestes patagonensis Ameghino

Title Variants

Alternative: Argentine fossorial mammal Necrolestes

Alternative: Reexamination of Necrolestes patagonensis Ameghino

Related Titles

Series: American Museum novitates, no. 3546

By

Asher, Robert J.
Horovitz, Inés
Martin, Thomas,
Sánchez-Villagra, Marcelo R.

Type

Book

Material

Published material

Publication info

New York, NY American Museum of Natural History c2007

Notes

Title from caption.

"January 15, 2007."

"We present new descriptions, figures, and interpretations of well-preserved cranioskeletal elements of the early Miocene, fossorial mammal Necrolestes patagonensis from Argentina. As previously noted, this animal is highly apomorphic and its phylogenetic affinities are difficult to interpret. Its derived features include hypsodont upper cheek teeth, a partially fused cervical spine, an unfused atlas consisting of separate right and left massae, and a distally ossified flexor tendon of the forearm. Characters that support its status as a therian mammal include a coiled cochlear housing of the inner ear. Consistent with its status as a metatherian is the presence of five upper incisors, transverse canal foramina, and a broad proximal fibula. However, we cannot confirm other characters claimed by previous researchers as evidence for affinity with marsupial or nonplacental mammals, such as the presence of an inflected mandibular angle and epipubic bones. Furthermore, Necrolestes shows similarities to eutherian mammals, such as small incisive foramina and possibly three molars. On biogeographic and some anatomical grounds, identification of Necrolestes as a metatherian remains a compelling option. However, pending a combined-data phylogenetic analysis encompassing Theria and accounting for the anatomical diversity of Necrolestes, possible membership in Eutheria should not be ruled out"--P. [1].

Subjects

Argentina , Mammals , Mammals, Fossil , Miocene , Necrolestes patagonensis , Paleontology , Phylogeny

Call Number

QL1 .A436 no.3546, 2007

Language

English

Identifiers

DOI: https://doi.org/10.1206/0003-0082(2007)3546[1:NARNAP]2.0.CO;2
OCLC: 79623295