BOMBA! BOMBA! Agora vai: acharam o Darwinius masillae, o elo perdido definitivo

Complete Primate Skeleton from the Middle Eocene of Messel in Germany: Morphology and Paleobiology

Jens L. Franzen1,2, Philip D. Gingerich3, Jörg Habersetzer1, Jørn H. Hurum4*, Wighart von Koenigswald5, B. Holly Smith6

1 Forschungsinstitut Senckenberg, Frankfurt, Germany, 2 Naturhistorisches Museum Basel, Basel, Switzerland, 3 Museum of Paleontology and Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan, United States of America, 4 Natural History Museum, University of Oslo, Oslo, Norway, 5 Steinmann-Institut für Geologie, Mineralogie und Paläontologie, Universität Bonn, Bonn, Germany, 6 Museum of Anthropology, University of Michigan, Ann Arbor, Michigan, United States of America

Abstract

Background

The best European locality for complete Eocene mammal skeletons is Grube Messel, near Darmstadt, Germany. Although the site was surrounded by a para-tropical rain forest in the Eocene, primates are remarkably rare there, and only eight fragmentary specimens were known until now. Messel has now yielded a full primate skeleton. The specimen has an unusual history: it was privately collected and sold in two parts, with only the lesser part previously known. The second part, which has just come to light, shows the skeleton to be the most complete primate known in the fossil record.

Methodology/Principal Findings

We describe the morphology and investigate the paleobiology of the skeleton. The specimen is described as Darwinius masillae n.gen. n.sp. belonging to the Cercamoniinae. Because the skeleton is lightly crushed and bones cannot be handled individually, imaging studies are of particular importance. Skull radiography shows a host of teeth developing within the juvenile face. Investigation of growth and proportion suggest that the individual was a weaned and independent-feeding female that died in her first year of life, and might have attained a body weight of 650–900 g had she lived to adulthood. She was an agile, nail-bearing, generalized arboreal quadruped living above the floor of the Messel rain forest.

Conclusions/Significance

Darwinius masillae represents the most complete fossil primate ever found, including both skeleton, soft body outline and contents of the digestive tract. Study of all these features allows a fairly complete reconstruction of life history, locomotion, and diet. Any future study of Eocene-Oligocene primates should benefit from information preserved in the Darwinius holotype. Of particular importance to phylogenetic studies, the absence of a toilet claw and a toothcomb demonstrates that Darwinius masillae is not simply a fossil lemur, but part of a larger group of primates, Adapoidea, representative of the early haplorhine diversification.

Citation: Franzen JL, Gingerich PD, Habersetzer J, Hurum JH, von Koenigswald W, et al. (2009) Complete Primate Skeleton from the Middle Eocene of Messel in Germany: Morphology and Paleobiology. PLoS ONE 4(5): e5723. doi:10.1371/journal.pone.0005723

Editor: John Hawks, University of Wisconsin, United States of America

Received: March 19, 2009; Accepted: May 12, 2009; Published: May 19, 2009

Copyright: © 2009 Franzen et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Funding: Philip D Gingerich was supported by the Alexander von Humboldt Foundation. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Competing interests: The authors have declared that no competing interests exist.

* E-mail: j.h.hurum@nhm.uio.no

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NOTA IMPERTINENTE DESTE BLOGGER:

Ué, mas a teoria da evolução de Darwin já não tinha sido 'provada' verdadeira em 1912???

DARWIN THEORY IS PROVED TRUE; English Scientists Say the Skull Found in Sussex Establishes Human Descent from Apes. Special Cable to THE NEW YORK TIMES.
December 22, 1912, Sunday.

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