Brienomyrus
|
|
The freshwater fish shown here is a member of the genus Brienomyrus in the African family Mormyridae. It is one of several species in this genus from the Ogooué River basin in Gabon. Because the species is undescribed it is temporarily referred to as Brienomyrus sp. This fish has a biphasic electric organ discharge with a duration of 1.5 msec. The fish lives in small forest streams and hides under rocks and under tree roots. |
Brienomyrus
is a genus with about 10 described species. The genus was established by Taverne (1971). They are characterized by: a moderately elongate body, dorsal and anal fins approximately equal in length; 5 to 7 teeth in upper jaw, 6 to 8 in lower jaw; absence of lateral ethmoid bone; 6 circumorbital bones; 4 hypural bones. Electric organs are composed of electrocytes with non-penetrating stalks with posterior innervation (Type NPp) or electrocytes with penetrating stalks with anterior innervation (Type Pa).Brienomyrus belongs to the family Mormyridae, the elephant-snouted fishes, or electric fishes frosm Africa.
All of the mormyridae are have electric organs in the tail; carry specialize electroreceptors on the skin surface; mormyids have two pairs of unique gemminiger's bones on dorsal and ventral margin of the caudal peduncle surrounding the electric organ.
The mormyridae belong to the sub-order mormyriformes which also includes the family Gymnarchidae, which has a single species, Gymnarchus niloticus
The lineage:
Eukaryotae; eukaryote crown group; Fungi/Metazoa group; Metazoa; Eumetazoa; Bilateria; Coelomata; Deuterostomia; Chordata; Vertebrata; Gnathostomata; bony vertebrates; Actinopterygii; Neopterygii; Teleostei; Osteoglossomorpha; Mormyriformes
References:
