Hemigrammus

Hemigrammus is a genus of freshwater fish in the family Characidae native to South America (including Trinidad) and commonly seen in the aquarium trade. These are medium-small tetras where the largest species reach up to around 11 cm.

Species
There are currently 59 recognized species in this genus:
 * Hemigrammus aereus Géry, 1959
 * Hemigrammus aguaruna F. C. T. Lima, Corrêa & Ota, 2016
 * Hemigrammus analis Durbin, 1909
 * Hemigrammus arua F. C. T. Lima, Wosiacki & C. S. Ramos, 2009
 * Hemigrammus ataktos Marinho, D'Agosta & Birindelli, 2014
 * Hemigrammus barrigonae C. H. Eigenmann & Henn, 1914
 * Hemigrammus bellottii (Steindachner, 1882)
 * Hemigrammus boesemani Géry, 1959
 * Hemigrammus brevis Durbin, 1911
 * Hemigrammus coeruleus Durbin, 1908
 * Hemigrammus cupreus Durbin, 1918
 * Hemigrammus cylindricus Durbin, 1909
 * Hemigrammus diagonicus Mendonça & Wosiacki, 2011
 * Hemigrammus durbinae Ota, F. C. T. Lima & Pavanelli, 2015
 * Hemigrammus elegans (Steindachner, 1882)
 * Hemigrammus erythrozonus Durbin, 1909 (Glowlight tetra)
 * Hemigrammus falsus Meinken, 1958
 * Hemigrammus filamentosus Zarske, 2011
 * Hemigrammus geisleri Zarske & Géry, 2007
 * Hemigrammus gracilis (Lütken, 1875)
 * Hemigrammus guyanensis Géry, 1959
 * Hemigrammus haraldi Géry, 1961
 * Hemigrammus hyanuary Durbin, 1918 (Costello tetra)
 * Hemigrammus iota Durbin, 1909
 * Hemigrammus levis Durbin, 1908
 * Hemigrammus luelingi Géry, 1964
 * Hemigrammus lunatus Durbin, 1918
 * Hemigrammus machadoi Ota, F. C. T. Lima & Pavanelli, 2014
 * Hemigrammus mahnerti Uj & Géry, 1989
 * Hemigrammus marginatus Durbin, 1911
 * Hemigrammus matei C. H. Eigenmann, 1918
 * Hemigrammus megaceps Fowler, 1945
 * Hemigrammus melanochrous Fowler, 1913
 * Hemigrammus micropterus Meek, 1907
 * Hemigrammus microstomus Durbin, 1918
 * Hemigrammus mimus J. E. Böhlke, 1955
 * Hemigrammus neptunus Zarske & Géry, 2002
 * Hemigrammus newboldi (Fernández-Yépez, 1949)
 * Hemigrammus ocellifer (Steindachner, 1882)
 * Hemigrammus ora Zarske, Le Bail & Géry, 2006
 * Hemigrammus orthus Durbin, 1909
 * Hemigrammus parana Marinho, F. R. de Carvalho, Langeani & Tatsumi, 2008
 * Hemigrammus pretoensis Géry, 1965
 * Hemigrammus pulcher Ladiges, 1938 (Garnet tetra)
 * Hemigrammus rodwayi Durbin, 1909 (Gold tetra)
 * Hemigrammus rubrostriatus Zarske, 2015
 * Hemigrammus schmardae (Steindachner, 1882)
 * Hemigrammus silimoni Britski & F. C. T. Lima, 2008
 * Hemigrammus skolioplatus Bertaco & T. P. Carvalho, 2005
 * Hemigrammus stictus (Durbin, 1909)
 * Hemigrammus taphorni Benine & G. A. M. Lopes, 2007
 * Hemigrammus tocantinsi F. R. de Carvalho, Bertaco & Jerep, 2010
 * Hemigrammus tridens C. H. Eigenmann, 1907
 * Hemigrammus ulreyi (Boulenger, 1895)
 * Hemigrammus unilineatus (T. N. Gill, 1858) (Feather-fin tetra)
 * Hemigrammus vorderwinkleri Géry, 1963
 * Hemigrammus yinyang F. C. T. Lima & L. M. Sousa, 2009