Acestridium dichromum Retzer, Nico
& Provenzano, 1999
contributors to this species:
Jensen's Photographic Library (3)
Gert Blank (2) Elko
Species of Acestridium
Haseman, 1911 are highly distinctive, small sized, specialized
loricariid catfishes, which have very narrow body, snout prolonged
with a distinctive anterior spatulate projection, and usually
green colour in life. Acestridium was diagnosed by
Schaefer (1991) based on the following characters: ten principal
caudal-fin rays; plates at anterior snout margin forming conspicuous
spatulate projection; head and body very slender, depressed;
dorsal surface of head and trunk with longitudinal ridges; dorsal
fin placed posteriorly, well beyond pelvic fin and just anterior
to anal-fin origin; adipose fin absent; dermal plates anterior
to first dorsal-fin proximal radial expanded, bearing ventromedial
keel contacting the dorsal margin of the neural arches of the
vertebrae six through twelve; and ridge of bone on the ventral
surface of the lateral ethmoid contacting the metapterygoid
channel reflected mesially. Currently, seven species of Acestridium
are described: A. discus Haseman, 1911, A. dichromum
Retzer, Nico & Provenzano, 1999, A. martini Retzer,
Nico & Provenzano, 1999. A. triplax, Rodriguez
& Reis, 2007, A. gymnogaster Reis & Lehmann,
2009, A. scutatum Reis & Lehmann A., 2009, and
A. colombiense Retzer, 2005. Aquarium Care:
will need a fairly strong current in the aquarium. Not the easiest
to care for so really a catfish for the more experienced Loricariid
keeper, so would be better in a species tank on their own. Diet:
Fine Vegetarian foods especially algae and small meaty foods
such as brine shrimp nauplii. They rarely sit on the substrate
but on leaf stalks and branches so they are especially difficult
to feed. Remarks: depending on its surroundings
this catfish can turn from green in to a more brownish colour
and vice versa.
Green Whiptail Catfish
Upper Orinoco and Negro River basins, Venezuela. Type
locality: Pozo Lucas, tributary of Río Orinoco,
7 km south of San Fernando de Atabapo, 4º02'N, 67º42'W,
Amazonas State, Venezuela.
Rodriguez, Monica S.; Reis
Roberto E. ; A new species of Acestridium Haseman,
1911 (Loricariidae: Hypoptopomatinae) from the Eastern Amazon
basin, Brazil. Neotrop. ichthyol. vol.5 no.4 Porto Alegre Oct./Dec.
Froese, R. and D. Pauly. Editors. 2014.FishBase.
World Wide Web electronic publication. www.fishbase.org, ( 08/2014
Schlüter, Michael; Acestridium dichromum.
Quick introduction. Amazonas magazine 12. July/August 2007.