Independent Origins and Rapid Evolution of the Placenta in the Fish Genus Poeciliopsis-Reference-Cited by-同舟云学术

Independent Origins and Rapid Evolution of the Placenta in the Fish Genus Poeciliopsis

Published:2002-11 Issue:5595 Volume:298 Page:1018-1020
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Reznick David N.¹,Mateos Mariana²,Springer Mark S.¹

Affiliation:

1. Department of Biology and Center for Conservation Biology, University of California, Riverside, CA 92521, USA.

2. Monterey Bay Aquarium Research Institute, 7700 Sandholdt Road, Moss Landing, CA 95039, USA.

Abstract

The evolution of complex organs is a source of controversy because they require the contributions of many adaptations to function properly. We argue that placentas are complex, that they have evolved multiple times in Poeciliopsis , and that there are closely related sister taxa that have either no placentas or intermediate stages in the evolution of a placenta. Furthermore, placentas can evolve in 750,000 years or less, on the same time scale as suggested by theoretical calculations for the evolution of complex eyes. Independent origins of such complexity, accompanied by sister taxa that either lack or have intermediate stages in the evolution of the trait, present an opportunity to study the evolution of novelty and complexity from a comparative, evolutionary perspective.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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