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28 results for “Pseudancistrus”
FIGURE 2 in Pseudancistrus sidereus, a new species from southern Venezuela (Siluriformes: Loricariidae) with a redescription of Pseudancistrus
FIGURE 2. Representative examples of Pseudancistrus: A. P. brevispinis NRM 32374, 49.6 mm SL, B. Pseudancistrus sp., AUM 36409, 54.4 mm SL, C. P. nigrescens AUM 35741, 133.8 mm SL, D. P. orinoco AMNH 91023, 62.5 mm SL. Photos by J.W. Armbruster.
FIGURE 1 in Pseudancistrus sidereus, a new species from southern Venezuela (Siluriformes: Loricariidae) with a redescription of Pseudancistrus
FIGURE 1. Pseudancistrus barbatus showing extreme development of the hypertrophied snout odontodes, AUM 38023, 126.6 mm SL. Photo by M.H. Sabaj.
FIGURE 3. Pseudancistrus sidereus, MCNG 26125, 175.6 in Pseudancistrus sidereus, a new species from southern Venezuela (Siluriformes: Loricariidae) with a redescription of Pseudancistrus
FIGURE 3. Pseudancistrus sidereus, MCNG 26125, 175.6 mm SL, holotype, dorsal, lateral, and ventral views. Photos by J.W. Armbruster.
FIGURE 3 in Pseudancistrus corantijniensis, a new species from the Guyana Shield (Siluriformes: Loricariidae) with a molecular and morphological description of the Pseudancistrus barbatus group
FIGURE 3. Comparison of snout odontodes and spotting pattern on the head of the four derived Guyanese Pseudancistrus. From left to right and up to down: Pseudancistrus depressus, Pseudancistrus barbatus, Pseudancistrus nigrescens and Pseudancistrus corantijniensis. Photographs by R. Covain, R. Kssas, S. Chraiti.
FIGURE 6 in Pseudancistrus corantijniensis, a new species from the Guyana Shield (Siluriformes: Loricariidae) with a molecular and morphological description of the Pseudancistrus barbatus group
FIGURE 6. Plot showing the minimal interorbital distance as a function of SL for Pseudancistrus barbatus and P. depressus. Linear regressions obtained by the least square method.
FIGURE 2. Pseudancistrus corantijniensis MHNG 2672.074 in Pseudancistrus corantijniensis, a new species from the Guyana Shield (Siluriformes: Loricariidae) with a molecular and morphological description of the Pseudancistrus barbatus group
FIGURE 2. Pseudancistrus corantijniensis MHNG 2672.074 (SU05-321), paratype, dorsal view showing the marked change in spots size in the posterior part of the head. Photo by R. Covain.
FIGURE 1. Pseudancistrus corantijniensis MHNG 2672.092 in Pseudancistrus corantijniensis, a new species from the Guyana Shield (Siluriformes: Loricariidae) with a molecular and morphological description of the Pseudancistrus barbatus group
FIGURE 1. Pseudancistrus corantijniensis MHNG 2672.092 (SU05-296), Holotype. Dorsal, lateral, and ventral views,
FIGURE 5 in Pseudancistrus corantijniensis, a new species from the Guyana Shield (Siluriformes: Loricariidae) with a molecular and morphological description of the Pseudancistrus barbatus group
FIGURE 5. Maximum Likelihood tree of the Guyanese derived Pseudancistus (-lnL = 3218.93185; gamma shape parameter = 0.613; number of categories = 6). Number above branches indicates bootstrap support. Cop. = Coppename basin; Cor. = Corantijn basin; Es. = Essequibo basin; Ma. = Maroni basin; Oy. = Oyapock basin; Su. = Suriname basin.
FIGURE 4 in Pseudancistrus corantijniensis, a new species from the Guyana Shield (Siluriformes: Loricariidae) with a molecular and morphological description of the Pseudancistrus barbatus group
FIGURE 4. Map of the Guyana Shield coastal rivers showing the sampling localities. Rectangle = P. nigrescens, round = P. corantijniensis, triangle = P. depressus, star = P. barbatus and diamond = P. niger. One symbol may cover more than one locality. We also present the type localities for each species given by filled symbols. The type locality of P. barbatus (Valenciennes, 1840) is the Mana River, while for P. depressus (Günther, 1868) it is the Suriname River, without further indications.
FIGURE 3 in A new species of suckermouth armored catfish, Pseudancistrus kwinti (Siluriformes: Loricariidae) from the Coppename River drainage, Central Suriname Nature Reserve, Suriname
FIGURE 3. Mouth of hypothetical Pseudancistrus showing the locations, when present, of the single buccal papilla (BP) and two dentary papillae (DP). The four tooth rows are filled in.
FIGURE 2 in A new species of suckermouth armored catfish, Pseudancistrus kwinti (Siluriformes: Loricariidae) from the Coppename River drainage, Central Suriname Nature Reserve, Suriname
FIGURE 2. Dorsal, lateral, and ventral views of adult Pseudancistrus kwinti, holotype, FMNH 116976, 94.3 mm SL.
FIGURE 1 in A new species of suckermouth armored catfish, Pseudancistrus kwinti (Siluriformes: Loricariidae) from the Coppename River drainage, Central Suriname Nature Reserve, Suriname
FIGURE 1. Dorsal, lateral, and ventral views of juvenile Pseudancistrus kwinti, paratype, FMNH 116975, 43.9 mm SL.
FIGURE 5 in A new species of suckermouth armored catfish, Pseudancistrus kwinti (Siluriformes: Loricariidae) from the Coppename River drainage, Central Suriname Nature Reserve, Suriname
FIGURE 5. Holotype locality. Coppename River at base of Sidonkroetoe-val rapids, Central Suriname Nature Reserve, Sipaliwini State, Suriname.
FIGURE 4 in A new species of suckermouth armored catfish, Pseudancistrus kwinti (Siluriformes: Loricariidae) from the Coppename River drainage, Central Suriname Nature Reserve, Suriname
FIGURE 4. Map of major rivers in Suriname and collection localities for Pseudancistrus kwinti (star = holotype, circle = paratype).
FIGURE 1 in A new species of Pseudancistrus from the Río Caroní, Venezuela (Siluriformes: Loricariidae)
FIGURE 1. Dorsal, lateral and ventral views of holotype of Pseudancistrus reus, MCNG 18447, 72.2 mm SL. Photos by N.K. Lujan.
FIGURE 4 in Pseudancistrus sidereus, a new species from southern Venezuela (Siluriformes: Loricariidae) with a redescription of Pseudancistrus
FIGURE 4. Range of Pseudancistrus sidereus, open symbol is the type locality.
FIGURE 2 in A new species of Pseudancistrus from the Río Caroní, Venezuela (Siluriformes: Loricariidae)
FIGURE 2. Type locality of Pseudancistrus reus and important rivers mentioned in the text.
Figure 6 from: da Costa e Silva G, Roxo F, Britzke R, Oliveira C (2014) New species of the Pseudancistrus barbatus group (Siluriformes, Loricariidae) with comments on its biogeography and dispersal routes. ZooKeys 406: 1-23. https://doi.org/10.3897/zookeys.406.7011
Figure 6 - Distribution and phylogenetic relationships of species of the Pseudancistrus barbatus group based on F-reticulon 4 gene. Based in our first hypothesis of extand-species distribution of this group the ancestral was widespread through all Guyana Shield rivers and Amazon Brazilian Shield rivers, the species Pseudancistrus zawadzkii and Pseudancistrus sp. L17 are in the limited distribution of this group in Tapajós and Xingu rivers, drainages of Brazilian Shield into Amazon.
Figure 5 from: da Costa e Silva G, Roxo F, Britzke R, Oliveira C (2014) New species of the Pseudancistrus barbatus group (Siluriformes, Loricariidae) with comments on its biogeography and dispersal routes. ZooKeys 406: 1-23. https://doi.org/10.3897/zookeys.406.7011
Figure 5 - a Habitat at type locality of Pseudancistrus zawadzkii: rio Tapajós, municipality of Itaituba, Pará State, Brazil b habitat at paratype locality: rio Tracuá, Tapajós river basin, municipality of Itaituba, Pará State, Brazil.
Figure 2 from: da Costa e Silva G, Roxo F, Britzke R, Oliveira C (2014) New species of the Pseudancistrus barbatus group (Siluriformes, Loricariidae) with comments on its biogeography and dispersal routes. ZooKeys 406: 1-23. https://doi.org/10.3897/zookeys.406.7011
Figure 2 - Maximum-likelihood tree based on nuclear gene sequence F-reticulon 4 (-lnL = 11470.59). Numbers next to nodes are bootstrap values based on 1,000 pseudoreplicates. Values below 50% are not shown.
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