POLYPLOIDY IN PROSERIATA (PLATYHELMINTHES) AND ITS PHYLOGENETICAL IMPLICATIONS

An 18S and 28S-based clock calibration for marine Proseriata (Platyhelminthes)

Kataplana celeretrix n. sp. (Platyhelminthes: Proseriata: Otoplanidae) from the Coast of North Carolina, USA.

Kataplana celeretrix is described as a new species of proseriate flatworm belonging to the Otoplanidae. This species was found in low-tide-level surface sediments at two high-energy beach sites in North Carolina and is unique among described Otoplanidae in possessing post-pharyngeal germaria. In addition, we consider the intermediate taxonomic position that this new species occupies between Par...

The expanding implications of polyploidy

Polyploid cells, which contain more than two genome copies, occur throughout nature. Beyond well-established roles in increasing cell size/metabolic output, polyploidy can also promote nonuniform genome, transcriptome, and metabolome alterations. Polyploidy also frequently confers resistance to environmental stresses not tolerated by diploid cells. Recent progress has begun to unravel how this ...

Polyploidy: genome obesity and its consequences.

Polyploidy is a major evolutionary feature of many plants and some animals (Grant, 1981;Otto & Whitton, 2000). Allopolyploids (e.g. wheat, cotton, and canola) were formed by combination of two or more distinct genomes, whereas autopolyploids (e.g. potato, sugarcane, and banana) resulted from duplication of a single genome. Both allopolyploids and autopolyploids are prevalent in nature (Tate et ...

The Saying/Showing Distinction in Early Wittgenstein and Its Implications

 Jafar Morvarid[1]  In this paper, I shall try to clarify the saying/showing distinction and to emphasize the role of this distinction in constructing a coherent picture of language and the world. In order to properly understand the differences between the sayable and the showable, I will throw light on the limits of language and the world. I will explain why it is impossible to say the showab...