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Coelacanth genome reveals lungfish to be closer tetrapod relative

April 18th, 2013 — 10:29am

The new study shows that lungfish are more closely-related to tetrapods than the coelacanth © Klaus Rudloff

An international team of researchers has decoded the genome of a creature whose evolutionary history is both enigmatic and illuminating: the African coelacanth. Continue reading »

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New tetra from the upper rio Tapajós, Brazil

April 15th, 2013 — 10:15pm

Hyphessobrycon peugeoti © Ingenito et al.

A new tetra of the genus Hyphessobrycon has been described from affluents of the middle rio Juruena, itself a tributary in the upper rio Tapajós basin, Mato Grosso State, Brazil. Continue reading »

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Sex ratio in kribensis influenced by environment

April 3rd, 2013 — 6:29pm

Adult male; red operculum morph (?) © Tino Strauss

Scientists from the University of Alberta, Canada, have ascertained that the pH of water influences both sex ratio and male phenotype in the kribensis, Pelvicahromis pulcher. Continue reading »

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Rasbora dusonensis and R. tornieri redescribed

March 27th, 2013 — 11:02am

Preserved specimens of R. dusonensis (top) and R. tornieri (bottom), both collected from the Sungai (river) Gelam, Sumatra © Ng & Kottelat

The identities of both species have been unclear for a number of decades but are resolved in a new paper by ichthyologists Heok Hee Ng and Maurice Kottelat published in the journal ‘Zootaxa’ last week. Continue reading »

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