Cat-eLog Right Callichthyidae Right Callichthyinae Right The genus Dianema

Down 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.
Down Most Kept Species
1.
Dianema urostriatumDianema urostriatum
(62%)
2.
Dianema longibarbisDianema longibarbis
(38%)
Down Genus Thumbnails