CanadaPleco
02-11-2009, 08:15 PM
Lujan, NK, M Arce & JW Armbruster, 2009. A new black Baryancistrus with blue sheen from the upper Orinoco (Siluriformes: Loricariidae). Copeia 2009: 50–56.
Abstract
Baryancistrus beggini, new species, is described from the upper RÃ*o Orinoco and lower portions of its tributaries, the RÃ*o Guaviare in Colombia and RÃ*o Ventuari in Venezuela. Baryancistrus beggini is unique within Hypostominae in having a uniformly dark black to brown base color with a blue sheen in life, and the first three to five plates of the midventral series strongly bent, forming a distinctive keel above the pectoral fins along each side of the body. It is further distinguished by having a naked abdomen, two to three symmetrical and ordered predorsal plate rows including the nuchal plate, and the last dorsal-fin ray adnate with adipose fin via a posterior membrane that extends beyond the preadipose plate up to half the length of the adipose-fin spine.
Abstract
Baryancistrus beggini, new species, is described from the upper RÃ*o Orinoco and lower portions of its tributaries, the RÃ*o Guaviare in Colombia and RÃ*o Ventuari in Venezuela. Baryancistrus beggini is unique within Hypostominae in having a uniformly dark black to brown base color with a blue sheen in life, and the first three to five plates of the midventral series strongly bent, forming a distinctive keel above the pectoral fins along each side of the body. It is further distinguished by having a naked abdomen, two to three symmetrical and ordered predorsal plate rows including the nuchal plate, and the last dorsal-fin ray adnate with adipose fin via a posterior membrane that extends beyond the preadipose plate up to half the length of the adipose-fin spine.