April 15th, 2015

Molecular development of chondrichthyan claspers and the evolution of copulatory organs

Molecular development of chondrichthyan claspers and the evolution of copulatory organs

Published on 14. April 2015 Molecular development of chondrichthyan claspers and the evolution of copulatory organs Katherine L. O’Shaughnessy, Randall D. Dahn, Martin J. Cohn ABSTRACT: The earliest known vertebrate copulatory organs are claspers, paired penis-like structures that are associated with evolution of internal fertilization and viviparity in Devonian placoderms. Today, only male chondrichthyans possess

Molecular and Morphological Analyses Reveal Phylogenetic Relationships of Stingrays Focusing on Dasyatidae

Molecular and Morphological Analyses Reveal Phylogenetic Relationships of Stingrays Focusing on Dasyatidae

Published on 13. April 2015 Molecular and Morphological Analyses Reveal Phylogenetic Relationships of Stingrays Focusing on the Family Dasyatidae (Myliobatiformes) Kean Chong Lim, Phaik-Eem Lim, Ving Ching Chong, Kar-Hoe Loh ABSTRACT: Elucidating the phylogenetic relationships of the current but problematic Dasyatidae (Order Myliobatiformes) was the first priority of the current study. Here, we studied three