January 25, 2011
Researchers Register New Species Using DNA-based Description
The previously unknown species of ribbon worm discovered in Kosterhavet National Park in 2007 has now been scientifically named using a new method. Pseudomicrura afzelii, a form of nemertean or ribbon worm, has been described and registered by researchers at the University of Gothenburg, Sweden, using DNA technology.
"We've shown that it's possible to move away from the traditional, highly labor-intensive way of describing a new species. Developments in molecular biology have made it possible to determine the genetic code for selected parts of DNA both quickly and cheaply." So says Malin Strand who, together with Per Sundberg, had the non-traditional description of the new nemertean published in a scientific journal. They have also deposited a type specimen of the species at the Gothenburg Museum of Natural History together with a test tube containing the species' unique DNA. Thus the species has been given its valid formal name and can be counted as a Swedish species "“ and the two researchers have opened the door to new methods for determining species.
"The description of the species is an extremely important part of the naming process. A species without a name just doesn't 'exist'. Without valid names for species, our perception of biological diversity is skewed."
However, this is a time-consuming process that in many cases involves expensive special techniques and specialist expertise. As a result, many new species are not described, but instead remain unprocessed.
Ribbon worms are an example of creatures that are traditionally described using anatomical characteristics, in other words how their internal organs such as intestines, blood vessels and brain are organized and what they look like. The recently published species description means that the two Gothenburg researchers are paving the way for more new species to be registered by linking a species-specific DNA code to a name.
Malin Strand and Per Sundberg from the University of Gothenburg both have links with the Swedish Species Information Centre. The article A DNA-based description of a new nemertean (phylum Nemertea) species has been published in the scientific journal Marine Biology Research.
Image Caption: This is Pseudomicrura afzelii. Credit: Illustration: Helena Samuelsson / The Encyclopedia of the Swedish Flora and Fauna
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