Scleropages

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Scleropages is a genus of fish in the family Osteoglossidae found in Asia and Australia. All of these species are carnivorous and have great jumping ability. These species are highly valued as aquarium fish, particularly by those from Asian cultures. In 2003, a study redescribed several naturally occurring color varieties of S. formosus into four separate species. The majority of researchers dispute these redescriptions, arguing that the published data are insufficient to justify recognizing more than one Southeast Asian species of Scleropages and that divergent haplotypes used to distinguish the color strains into isolated species were found within a single color strain, contradicting the findings. They are considered monotypic, consisting of closely related haplotypes based on color. The ancestor of the Australian arowanas: S. jardinii and S. leichardti, diverged from the ancestor of the Asian arowanas about 140 million years ago, during the Early Cretaceous period. The morphological similarity of all seven species shows that little evolutionary change has taken place recently for these ancient fish. The genus had a much wider distribution during the early Cenozoic, with fossil remains known from the Paleocene of Niger and Belgium, and from the Eocene of China

Video Scleropages

Species

There are currently 7 recognized species in this genus:

• Scleropages formosus (S. Müller & Schlegel, 1840) (Asian bonytongue; green arowana)
• Scleropages inscriptus T. R. Roberts, 2012 (Myanmar bonytongue)
• Scleropages jardinii (Saville-Kent, 1892) (Australian bonytongue, northern barramundi)
• Scleropages leichardti Günther, 1864 (Spotted bonytongue/barramundi)
• Scleropages macrocephalus Pouyaud, Sudarto & Teugels 2003 (Silver Indonesian arowana)
• Scleropages legendrei Pouyaud, Sudarto & Teugels 2003 (Super red/blood Indonesian arowana)
• Scleropages aureus Pouyaud, Sudarto & Teugels 2003 (Indonesian/red-tailed golden arowana)

Maps Scleropages

Phylogeny

Phylogeny based on the work of Pouyaud, Sudarto & Teugels 2003.

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References

Source of the article : Wikipedia