New Genus
Lasiancistrus sp., photo by J.W. Armbruster
Lasiancistrus sp., photo by J.W. Armbruster
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Armbruster and Provenzano
(submitted) are describing four new species of Lasiancistrus from
southern Venezuela. We are describing these species in Lasiancistrus
because
we disagree on generic placement. I can find no evidence that the
species belong in Lasiancistrus. Instead, I find that the
group is sister to Lasiancistrus + Ancistrus. We act
conservatively by placing the species in Lasiancistrus; however,
I am convinced that a new genus must be erected for these four species.
The new genus lacks whisker-like odontodes as well as other synapomorphies
for Lasiancistrus such as 3 (vs. 4) branchiostegal rays, and an
open dilatator operculi chamber. More information will be added to
this page upon acceptance of our manuscript.
DISTRIBUTION
Most species are restricted to Amazonas, Venezuela in the upper Río
Orinoco and upper Río Negro and their tributaries. One species
(the one on the top above) is also found in the Ríos Caura and Aro
of Bolivar state, Venezuela.
LITERATURE CITED
Armbruster, J.W. and F. Provenzano. Submitted. Four new species
of the suckermouth armored catfish genus Lasiancistrus (Loricariidae:
Ancistrinae). Ichthyological Exploration of Freshwaters.
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If you have any comments or questions regardng
this site, please contact Jon Armbruster at armbrjw@mail.auburn.edu