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Researchers identify new catfish family

Editor : A 3D scan of one of the new catfish is available at digimorph

A team of researchers from Mexico and the United States has identified a new family of catfish in the state of Chiapas, Mexico. The paper detailing the discovery has been published in Zootaxa, an online scientific journal.

They've named the new family Lacantuniidae and named the species Lacantunia enigmatica. It becomes the 37th family of catfishes, a diverse group of fish found around the world.

Discovery of new families of living vertebrates is rare; in ichthyology there have been just two new families discovered in the past 60 years: the coelacanth in 1938 and the megamouth shark in 1983.

The researchers are Dr. Rocio Rodiles-Hernandez of the Colegio de la Frontera Sur, Dr. Dean Hendrickson and Dr. Julian Humphries of The University of Texas at Austin and Dr. John Lundberg of the Academy of Natural Sciences of Philadelphia.

Thorough anatomical studies of the fish document its status as a new family and show that the fish is the only member of an ancient group that may have arisen while dinosaurs roamed the Earth.

The fish's skeleton was scanned by high-resolution computer tomographic equipment at The University of Texas at Austin.

"To most people it's just a catfish, and externally it looks a lot like an ictalurid, the family to which all North American freshwater catfishes belong." Hendrickson said. "But once we got into the skeleton, we started seeing all these weird things."

A barbel (the part that resembles a cat's whisker) is articulated differently from that of an ictalurid. There also are differences in the bone structure of the skull and in the shape of the air bladder.

"The ictalurids all have these big jaw muscles that come up over the top and anchor on top of the head" Hendrickson said. "This has a very narrow cranium and the muscles anc
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Source:University of Texas at Austin


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