Find research datasets worth reusing

Fig. 5 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 5: Osteology of Metynnis melanogrammus, INPA 18457, 144.8 mm SL: a. hyopalatine and opercular series; b, infraorbitals; c. hyoid arch; d. left pectoral girdle, lateral view; e. left pectoral girdle, medial view. ach, anterior ceratohyal; apal, autopalatine; ant, antorbital; br, branchiostegal rays; cle, cleithrum; cor, coracoid; dh, dorsal hypohyal; ect, ectopterygoid; end, endopterigoid; exs, extrascapular; hyo, hyomandibular; io1-5, infraorbital 1-5; iop, interopercular; mes, mesocoracoid; met, metapterygoid; op, opercle; pch, posterior ceratohyal; pcle1-3, postcleithrum 1-3; pecR, pectoral-fin rays; pop, preopercle; ptem, posttemporal; qua, quadrate; sca, scapula; scle, supracleithrum; sop, subopercle; sym, symplectic; uh, urohyal; vh, ventral hypohyal. Scale bars: 10 mm.

Fig. 8 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 8. Map of northern South America, including northern Brazil and southern Venezuela, showing distribution of Metynnis melanogrammus. The red star represents the type locality, red circles represent the paratype localities, and the black circle represents the locality on the rio Surunduri at which the live photograph of the new species (Fig. 7) was taken.

Fig. 1 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 1. Metynnis melanogrammus, Brazil, Amazonas, Maués, rio Parauari: a. INPA 52216, male, 141.3 mm SL, holotype; b. INPA 34811, female, 149.4 mm SL, paratype.

Fig. 2. Metynnis melanogrammus, INPA 18457, 144.8 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 2. Metynnis melanogrammus, INPA 18457, 144.8 mm SL. Abdominal spines: a. left lateral view; b. dorsal view. blSp, bilateral spine; bpt, basipterygium; poPvSp, postpelvic spines; prPvSp, prepelvic spines; pvR, pelvic-fin rays. Scale bars: 10 mm.

Fig. 7 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 7. Freshly collected Metynnis melanogrammus, male, not-preserved; lago do Aracu, rio Sucunduri, rio Madeira basin. Photo: A. Zenaid.

Fig. 4 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 4. Neurocranium of Metynnis melanogrammus, INPA 18457, 144.8 mm SL: a. lateral view; b. dorsal view; c. ventral view. boc, basi occipital; epBar, epiphyseal bar; epo, epiotic; exoc, exoccipital; fro, frontal; int, intercalar; lEt, lateral ethmoid; mes, mesethmoid; nas, nasal; neu, neural; olf, olfactory fossa; osph, orbitosphenoid; par, parietal; pro, prootic; psph, parasphenoid; ptf, posttemporal fossa; pto, pterotic; ptsph, pterosphenoid; soc, supraoccipital; sorb, supraorbital; sph, sphenotic; vom, vomer. Scale bar: 10 mm.

Fig. 3 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 3. Mandibular series of Metynnis melanogrammus, INPA 18457, 144.8 mm SL: a. labial and lingual view of premaxillary; b. labial and lingual view of dentary; c. maxillary. 1-5, teeth in labial row; 1'-2', teeth in lingual row; anAr, anguloarticular; ap, ascending process; dp, descending process; lm, lamellae at symphysis; lp, lateral process of premaxilla; ret, retroarticular; sy, symphyseal tooth; rt, replacement teeth. Scale bar: 10 mm.

Fig. 6 in A new Silver Dollar species of Metynnis Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela

Fig. 6. Axial skeleton of Metynnis melanogrammus, INPA 18457, 144.8 mm SL: a. dorsal fin, left lateral view; b. anal fin, left lateral view; c. caudal fin, left lateral view; d. abdominal spines, left lateral view; e. abdominal spines, dorsal view. anR, anal-fin rays; blSp, bilateral spine; bpt, basipterygium; dBs, dorsal bony stay; doR, dorsal-fin rays; dRd, distal radial; ep1-2, epural 1-2; h1-5, hypural 1-5; pCdr, principal caudalfin rays; pMRd, proximal-middle radial; poPvSp, postpelvic spines; prDSp, predorsal spine; prPvSp, prepelvic spines; pU2-3, preural centrum 2-3; pvR, pelvic-fin rays; U, compound ural centrum. Scale bars: 10 mm.

Fig. 1 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 1. Mean (± S.E.M) bimonthly variations of the gonadosomatic index in Metynnis maculatus females (n = 36). The different letters indicate significant differences among months. (ANOVA, Tukey test, P <0.05).

Fig. 5 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 5. (a) Pearson correlation between the volume density of final vitellogenic oocytes and the gonadosomatic index (GSI) (%) during the reproductive cycle of Metynnis maculatus females (n = 36). (b) Pearson correlation between the volume density of post-ovulatory follicles and the GSI (%) (n = 36). (c) Pearson correlation between the E 2 plasma levels and the GSI (%) (n = 20). (d) Pearson correlation between the 17α-OHP plasma levels and the GSI (%) (n = 20). (e) Pearson correlation between the E 2 plasma levels and the volume density of final vitellogenic oocytes (n = 20). (f) Pearson correlation between the 17α-OHP plasma levels and the volume density of the post-ovulatory follicles (n = 20). The continuous line indicates that the difference is statistically significant (Pearson's test, P <0.05).

Fig. 4 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 4. (a) Mean (± S.E.M) bimonthly plasma concentrations of E 2 in Metynnis maculatus females (n = 20). Different letters indicate significant differences among months (ANOVA, Tukey test, P <0.05). (b) Mean (± S.E.M) bimonthly plasma 17α – OHP concentrations (n = 20). Different letters indicate significant differences among months. (ANOVA, Tukey test, P <0.05).

Fig. 3 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 3. Mean percentages (± S.E.M) of different oocyte types from Metynnis maculatus females during the ovarian maturation cycle. Different letters indicate significant differences among the same type of oocytes among months (ANOVA, Tukey test, P <0.05).

Fig. 2 in Dynamics of ovarian maturation during the reproductive cycle of Metynnis maculatus, a reservoir invasive fish species (Teleostei: Characiformes)

Fig. 2. Photomicrographs of different oocyte types observed during the Metynnis maculatus reproductive cycle. (a) Previtellogenic oocytes showing multiple nucleolus (arrow), (b) Cortical alveoli oocyte; (c) Early vitellogenic oocyte with cytoplasm filled mostly with cortical alveoli (asterisk); (d) Final vitellogenic oocyte with cytoplasm completely filled with protein yolk granules (asterisk); (e) Post ovulatory follicles with numerous border folding (arrow), (f) Atretic oocytes with fragmented vitelline membrane (arrow) and a change in the appearance of the cytoplasm (asterisk). Hematoxylin-floxin. Scale bar = 100 µM..

opencc-by-4.0Sep 2009View details →

Fig. 5. Metynnis mola spermatozoa. A and B in Spermiogenesis and spermatozoa ultrastructure in the Serrasalminae (Ostariophysi: Characiformes) with further evidence on the relationships of the piranhas and pacus

Fig. 5. Metynnis mola spermatozoa. A and B - Spermatozoa in longitudinal sections. C and D - Longitudinal sections of the nuclear fossa region. E to H - Midpiece in cross sections. I - Flagellum in longitudinal section. J, K and L - Flagella in cross sections. Scale bars, A = 0.6 µm; B = 0.55 µm; C = 0.4 µm; D = 0.35 µm; E= 0.5 µm; F = 0.4 µm; G = 0.35 µm; H = 0.25 µm; I = 0.35 µm; J - K = 0,15 µm; L = 0.1 µm. A: axoneme; C: centriole; D: distal centriole; F: flagellum; M: mitochondria; N: nucleus; P: proximal centriole; V: vesicle; Asterisk: tubule-vesicular compartment; Arrow: electron dense material; Arrowhead: cytoplasmic canal; Double arrow: nuclear fossa; Star: cytoplasmic sleeve.

Fig. 4 in New species of Metynnis Cope, 1878 (Characiformes: Characidae) from the rio Paraguay basin, Mato Grosso State, Brazil

Fig. 4. Partial map of Brazil and adjoining countries showing collecting sites of Metynnis cuiaba. Asterisk = type locality. Dot = distribution (symbols represent more than one collecting locality).

Fig. 3 in New species of Metynnis Cope, 1878 (Characiformes: Characidae) from the rio Paraguay basin, Mato Grosso State, Brazil

Fig. 3. Sexual dimorphism in Metynnis cuiaba. Left: NUP 3276, 131.1 mm SL, male; right: MZUSP 100627, 80.5 mm SL, female. Both collected at baía Sinhá Mariana, rio Cuiabá drainage.

Fig. 2 in New species of Metynnis Cope, 1878 (Characiformes: Characidae) from the rio Paraguay basin, Mato Grosso State, Brazil

Fig. 2. Metynnis cuiaba, paratype, NUP 2055, 111.6 mm SL, female, baía Sinhá Mariana, rio Cuiabá drainage.

Fig. 1 in New species of Metynnis Cope, 1878 (Characiformes: Characidae) from the rio Paraguay basin, Mato Grosso State, Brazil

Fig. 1. Metynnis cuiaba, holotype, MZUSP 100626, 142.5 mm SL, female, baía Sinhá Mariana, rio Cuiabá drainage.

zenodo36/100

Fig. 5 in New species of Metynnis Cope, 1878 (Characiformes: Characidae) from the rio Paraguay basin, Mato Grosso State, Brazil

Fig. 5. Ratio between standard length and body depth in juveniles and adults of Metynnis cuiaba.