Summary of dianema |
Pronounced | die ah NEE mah |
Etymology | Dianema: From the Greek di-, meaning two and nema, meaning filament; in
reference to the long maxillary barbels. |
Sexing | In Dianema, Hoplosternum and Megalechis (but not in Callichthys), medial expansions of the coracoid bones are especially developed, covering most of the skin between the pectoral fins and sometimes overlapping at the midline in fully developed mature males (vs. not fully covering the abdominal skin and not overlapping in females). Mature males of Callichthys, Dianema, Hoplosternum, Lepthoplosternum, and Megalechis have a thick adipose body on the ventral surface of the pectoral fin. Mature females of Dianema, Hoplosternum and Megalechis have a small fold of skin on the external face of the leading pelvic-fin ray. |
Size | Smallest 82mm, largest 84mm, average 83mm, most commonly 82mm. All SL. |
Species | There are 2 "species" in the database |
Keepers | 2 species (100%) are being kept by registered keepers |
New spp. / time | | | | | | | | | | | | | | | 1750 | 1770 | 1790 | 1810 | 1830 | 1850 | 1870 | 1890 | 1910 | 1930 | 1950 | 1970 | 1990 | 2010 |
|
Distribution |
Login to view the map. |