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Fig. 1 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 1. Ituglanis agreste, new species, holotype, MNRJ 40196, 40.5 mm SL, Brazil, Bahia State, municipality of Boa Nova, rio de Contas basin. a - lateral; b - dorsal; c - ventral views.

Fig. 9 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 9. Caudal skeleton of Ituglanis agreste, paratype, UFRN 38, 41.8 mm SL. Left lateral view. Abbreviations: HS, hemal spines; H3, hypural 3; H4+H5, hypurals 4 and 5 fused; NS, neural spine; PC1+UR, pleural 1 and ural fused; PC2, pleural centrum 2; PH+HU1+HU2, parhypural partially fused to hypurals 1-2; UN, uroneural. Scale bar = 1 mm.

Fig. 4 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 4. Right suspensorium and opercular series of Ituglanis agreste, UFRN 38, 41.8 mm SL. Lateral view.The arrow indicates the interopercle plate broad and elongate. Abbreviations: HYO, hyomandibula; IOP, interopercle; MPT, metapterygoid; OPE, opercle; POP, preopercle; QUA, quadrate. Scale bar = 1 mm.

Fig. 8 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 8. Pelvic girdle of Ituglanis agreste, paratype, UFRN 38, 41.8 mm SL. Dorsal view.Abbreviations:APS, anterior processes; AMP, anterior medium processes; BPT, basipterygium; PSP, pelvic splint; PVR, pelvic rays. Scale bar = 1 mm.

Fig. 1 in Induced spawning and reproductive variables of the catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)

Fig. 1. Linear relationships of total fecundity (TF), initial fertility (IF) and final fertility (FF) to variations in body weight (BW) (a) and total length (TL) (b), obtained simultaneously from nine Lophiosilurus alexandri females submitted to hypophysation at Três Marias Hydrobiology and Hatchery Station in January 1997.

Fig. 2 in Induced spawning and reproductive variables of the catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)

Fig. 2. Macro and microscopic morphology of the ovaries (a-b) and testis (c-d) mature of the Lophiosilurus alexandri. (a) The mature ovaries were bulky, highly vascularized, yellowish and presenting large vitellogenic oocytes. (b) Histological section of the vitellogenic oocyte characterized by the presence of acidophilic yolk globules (Y) throughout the ooplasm and nucleus (N) migrating toward the animal pole. (c) Mature testis (arrow) are whitish, turgids, vascularized and with well developed fringes (Insert showing fringes). (d) Mature testis showing seminiferous tubules (ST) filled by spermatozoa (SPZ). (a, c and insert) bars 1cm; (b and d) stained with hemotoxylin-eosin and bars 100 μm.

Fig. 7 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 7. Left Pectoral girdle of Ituglanis agreste, paratype, UFRN 38, 41.8 mm SL. Ventral view. Abbreviations: CLE, cleithrum; PTR, pectoral rays; PR1, proximal radial 1 (cartilaginous); PR2, proximal radial 2; SCO, scapulocoracoid. Scale bar = 1 mm.

Fig. 6 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 6. Branchial skeleton of Ituglanis agreste, paratype, UFRN 38, 41.8 mm SL. Dorsal view (left dorsal elements and gill rakers not shown). Abbreviations: BB2-4, basibranchials 2 to 4; CB1-5, ceratobranchials 1 to 5; EB1-4, epibranchials 1 to 4; HB1-3, hypobranchials 1 to 3; PB3-4, pharyngobranchials 3 to 4; TPL, tooth plate. Scale bar = 1 mm.

Fig. 5 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 5. Left hyoid arch of Ituglanis agreste, paratype, UFRN 38, 41.8 mm SL.Ventral view.Abbreviations:ACH, anterior ceratohyal; BRR, branchiostegal rays; PCH, posterior ceratohyal; PUH, parurohyal; VHH, ventral hypohyal. Scale bar = 1 mm.

Fig. 3 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 3. Left mandible of Ituglanis agreste, paratype, UFRN 38, 41.8 mm SL. Medial view. Abbreviations: AAR, anguloarticulo-retroarticular; CPR, coronoid process; DEN, dentary. Scale bar = 1 mm.

Fig. 2 in Ituglanis agreste, a new catfish from the rio de Contas basin, northeastern Brazil (Siluriformes: Trichomycteridae)

Fig. 2. Neurocranium and Weberian capsule of Ituglanis agreste, UFRN 38, 41.8 mm SL; a, dorsal view; b, ventral view. Abbreviations: AOR, antorbital; APA, autopalatine; BAO+EXO, basioccipital-exoccipital bone; EPO, epioccipital; FRO, frontal; FSO, parieto-supraoccipital fontanel; i1-i11, infraorbital pores; ll1-ll3, lateral line pores; LET, lateral ethmoid; MAX, maxilla; MET, mesethmoid; ORB, orbitosphenoid; PAS, parasphenoid; PMX, premaxilla; po1, preopercular pore; PSO, parietosupraoccipital; PSC, posttemporo-supracleithrum; PTE, pterotic; s1-s6, supraorbital pores; SPH+POT+PSF, sphenotic-prooticpterosphenoid; SSO, sesamoid supraorbital; VOM, vomer; WEB, Capsule of Weberian apparatus. Scale bar = 1 mm.

Fig. 3 in Efficacy of eugenol and the methanolic extract of Condalia buxifolia during the transport of the silver catfish Rhamdia quelen

Fig. 3. The net ion (Na+, Cl- and K+) fluxes measured for the transport of Rhamdia quelen in plastic bags with eugenol and with the methanolic extract of Condalia buxifolia added to the water. The values are the means ± SEM. The different letters indicate significant differences between the treatments for the same ion (P<0.05).

Fig. 1 in Efficacy of eugenol and the methanolic extract of Condalia buxifolia during the transport of the silver catfish Rhamdia quelen

Fig. 1. Time to reach the light sedation stage in Rhamdia quelen juveniles of two different weight classes exposed to the methanolic extract of Condalia buxifolia. The following equations were fitted to the data: For fish weighing 1.50 ± 0.02 g; y = 209.629 e0.015 x; r2 =0.996. For fish weighing 165.7 ± 22.5 g; y = 2039.020 e0.017 x; r2 =0.999. Where x = the concentration of the methanolic extract of C. buxifolia (µL L-1) and y = time for sedation(s).

Fig. 5 in Parotocinclus seridoensis, a new hypoptopomatine catfish (Siluriformes: Loricariidae) from the upper rio Piranhas-Açu basin, northeastern Brazil

Fig. 5. Geographic distribution of Parotocinclus species in Mid-Northeastern Caatinga region and rio Parnaíba basin, northeastern Brazil. Open symbols represents type localities.

Fig. 3 in Parotocinclus seridoensis, a new hypoptopomatine catfish (Siluriformes: Loricariidae) from the upper rio Piranhas-Açu basin, northeastern Brazil

Fig. 3. Ventral view of abdominal region showing the lateral plates and preanal platelets in Parotocinclus seridoensis, UFRN 005, 37.0 mm SL, female. Abbreviations: LPS, lateral plate series; MPS, median plate series; PAR, preanal region.

Fig. 6 in Harttia absaberi, a new species of loricariid catfish (Siluriformes: Loricariidae: Loricariinae) from the upper rio Paraná basin, Brazil

Fig. 6. Map of upper portion of rio Paraná basin showing currently known distribution of Harttia absaberi (red diamond in the left = type locality).

Fig. 4 in Parotocinclus seridoensis, a new hypoptopomatine catfish (Siluriformes: Loricariidae) from the upper rio Piranhas-Açu basin, northeastern Brazil

Fig. 4. Ventral view of pectoral girdle of Parotocinclus seridoensis, UFRN 005, 30.7 mm SL, female. Abbreviations: AP, abdominal plates; AFO, arrector fossa opening; CL, cleithrum; CO, coracoid.

Fig. 7 in Parotocinclus seridoensis, a new hypoptopomatine catfish (Siluriformes: Loricariidae) from the upper rio Piranhas-Açu basin, northeastern Brazil

Fig. 7. Anterior view of rostrum of: a. Parotocinclus seridoensis, MZUSP 113424, 33.4 mm SL, showing an area deprived of odontodes (arrow) at the anterior border of the snout; b. Parotocinclus spilurus, UFPB 336, 29.6 mm SL, with anterior border of the snout covered by odontodes.

Fig. 6 in Parotocinclus seridoensis, a new hypoptopomatine catfish (Siluriformes: Loricariidae) from the upper rio Piranhas-Açu basin, northeastern Brazil

Fig. 6. Type locality of Parotocinclus seridoensis, Brazil, Rio Grande do Norte State, Caicó, rio Seridó, rio Piranhas-Açu basin.

Fig. 1 in Parotocinclus seridoensis, a new hypoptopomatine catfish (Siluriformes: Loricariidae) from the upper rio Piranhas-Açu basin, northeastern Brazil

Fig. 1. Parotocinclus seridoensis, holotype, MZUSP 113422, 37.7 mm SL, female, Brazil, Rio Grande do Norte State, Caicó Municipality, rio Seridó, rio Piranhas-Açu basin. Lateral, dorsal, and ventral views.