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I pesci fossili di Bolca forniscono nuovi esempi di asimmetria [Amphistium, Heteronectes, Pleuronectiformes]


I pesci fossili di Bolca forniscono nuovi esempi di asimmetria[vedi numero di Settembre 2008 di “Le Scienze”]


Links:

http://www.telegraph.co.uk/earth/main.jhtml?view=DETAILS&grid=&xml=/earth/2008/07/09/sciflat109.xml

Video from Youtube:

http://www.youtube.com/watch?v=qSYl4aMe0BE

Links from Nature.com 

1. The evolutionary origin of flatfish asymmetry

Matt Friedman

SUMMARY: All adult flatfishes (Pleuronectiformes), including the gastronomically familiar plaice, sole, turbot and halibut, have highly asymmetrical skulls, with both eyes placed on one side of the head.

CONTEXT: …Naturhistorisches Museum, Vienna (NHMW). Total length is 142 mm; standard length is 111 mm. Horizon and locality. Bolca, possibly Monte Postale locality, northern Italy. Lower Eocene (Ypresian; SBZ11). Diagnosis. Stem pleuronectiform…

Nature 454, 209 – 212 (10 Jul 2008), doi: 10.1038/nature07108, Letter

2. The eyes have it

Daniel Cressey

SUMMARY: Fossilized flatfish settle evolutionary conundrum.

CONTEXT: …I first noticed the fossil, it was sitting unidentified in a drawer of indeterminate fossil fish pieces from Monte Bolca [in Italy],” he says. “And believe me, it didn t look like much at the time it was an incomplete specimen…

Nature News (09 Jul 2008), doi: 10.1038/news.2008.946, News

3. Palaeontology: Squint of the fossil flatfish

Philippe Janvier

SUMMARY: Evolutionary biologists have floundered when trying to explain how the asymmetrical head of flatfishes came about. ‘Gradually’ is the answer arising from exquisite studies of 45-million-year-old

CONTEXT: …(which has been known for a long time). The specimens all come from the exceptional fossil-fish locality of Bolca, Italy, and were once regarded as possible flatfish relatives on the basis of their postcranial skeleton. However, this…

Nature 454, 169 – 170 (09 Jul 2008), doi: 10.1038/454169a, News and Views

settembre 23, 2008 - Posted by | - Italia, - Pesci / Fishes, 6 Eocene, Articolo sc. di riferimento, P - Evoluzione, P - Ritrovamenti fossili, Paleontology / Paleontologia, Video | , , , , , , , , , , , , , ,

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