New species of the Pseudancistrus barbatus group

[racoll]

Silva et al. 2014. New species of the Pseudancistrus barbatus group (Siluriformes, Loricariidae) with comments on its biogeography and dispersal routes. ZooKeys. 10.3897/zookeys.406.7011.

Note that

Hopliancistrus sp(l017)

is a

Pseudancistrus

.

[racoll]

Note that Hopliancistrus sp(l017) is a Pseudancistrus.

I wonder if this is a misidentified

L067

? There is definitely a

Hopliancistrus

in the Xingu.

[HaakonH]

I think you're spot on here, Racoll. With so much confusion about L17 vs L67 I'm sure the authors are thinking of L67.

Haakon

[Jools]

I'll have a look at this shortly...

[TwoTankAmin]

this one the entire paper is available online.

Abstract

A new species of Pseudancistrus is described from the Tapajós Basin, and assigned to the P. barbatus group by having hypertrophied odontodes along the snout and lacking evertible cheek plates. The new species is distinguished from other species in that group (P. barbatus, P. corantijniensis, P. depressus and P. nigrescens) by its pattern of spots, length and color of snout odontodes, greater head depth, cleithral width, anal-fin spine length, peduncle depth and internares width. Molecular phylogenetic results corroborate placement of the new species in the Pseudancistrus barbatus group which is otherwise distributed in the Xingu Basin and rivers draining the Guyana Shield into the Atlantic Ocean. Topology tests strongly reject alternative hypotheses supporting close relationships with Guyanancistrus, Lithoxancistrus or the species Pseudancistrus pectegenitor, P. sidereus and P. genisetiger. Additionally, we propose two hypotheses on the distribution of the new species in the rio Tapajós, a Brazilian Shield drainage. The first one proposes that ancestral stock of the P. barbatus group was widely distributed throughout rivers draining the Guyana and Brazilian shields, and the species P. zawadzkii and Pseudancistrus sp. L17 are in the limit of the distribution for the group in Tapajós and Xingu rivers. The second hypothesis proposes that ancestral stock of the P. barbatus group was restricted to Guyana Shield rivers, and that headwater capture events permitted several dispersal routs through Guyana and Amazon rivers, permitted that the ancestral lineages of Pseudancistrus sp. L17 and P. zawadzkii reached the rivers of Amazon basin.

Read it all here http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4023244/

[Silurus]

http://www.planetcatfish.com/forum/view ... hp?t=40338

Do not double post.

[Jools]

http://www.planetcatfish.com/forum/view ... hp?t=40338

Do not double post.

I'll merge them...

Jools