Species of Cyanocharax have been transferred to Diapoma.
new combinations from Cyanocharax for Argentina:
– Diapoma alburnum (Hensel, 1870)
– Diapoma lepiclastum (Malabarba, Weitzman & Casciotta, 2003)
– Diapoma obi (Casciotta, Almirón, Piálek & Rican, 2012)
– Diapoma uruguayense (Messner, 1962)
new combinations from Cyanocharax for Uruguay:
– Diapoma alburnum (Hensel, 1870)
– Diapoma alegretense (Malabarba & Weitzman, 2003)
– Diapoma uruguayense (Messner, 1962)
remarks:
Diapoma as name of a genus is of neutral gender. Therefore the authors of the current publication should have changed the endings of the specific names alburnus and lepiclastus to -um.
The etymology of lepiclastus is given as “clastus from the Greek klastos meaning broken in pieces”. Hereby the greek word was latinized and the latin grammar rules apply.
published in:
Thomaz, A.T., D. Arcila, G. Ortí & L.R. Malabarba (2015):
Molecular phylogeny of the subfamily Stevardiinae Gill, 1858 (Characiformes: Characidae): classification and the evolution of reproductive traits.
BMC Evolutionary Biology 15 (146): 1-25
Additional file 5: New Stevardiinae classification based on phylogenetic relationships.
abstract (from publication):
Background: The subfamily Stevardiinae is a diverse and widely distributed clade of freshwater fishes from South and Central America, commonly known as “tetras” (Characidae). The group was named “clade A” when first proposed as a monophyletic unit of Characidae and later designated as a subfamily. Stevardiinae includes 48 genera and around 310 valid species with many species presenting inseminating reproductive strategy. No global hypothesis of relationships is available for this group and currently many genera are listed as incertae sedis or are suspected to be non-monophyletic.
Results: We present a molecular phylogeny with the largest number of stevardiine species analyzed so far, including 355 samples representing 153 putative species distributed in 32 genera, to test the group’s monophyly and internal relationships. The phylogeny was inferred using DNA sequence data from seven gene fragments (mtDNA: 12S, 16S and COI; nuclear: RAG1, RAG2, MYH6 and PTR). The results support the Stevardiinae as a monophyletic group and a detailed hypothesis of the internal relationships for this subfamily.
Conclusions: A revised classification based on the molecular phylogeny is proposed that includes seven tribes and also defines monophyletic genera, including a resurrected genus Eretmobrycon, and new definitions for Diapoma, Hemibrycon, Bryconamericus sensu stricto, and Knodus sensu stricto, placing some small genera as junior synonyms. Inseminating species are distributed in several clades suggesting that reproductive strategy is evolutionarily labile in this group of fishes.