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FIGURE 6. Gamispatulus ferrilongus n in Two Gamispatulus Thatcher & Boger, 1984 (Cyclopoida: Ergasilidae) from Schizodon intermedius Garavello & Britski (Actinopterygii: Anostomidae), with description of a new species

FIGURE 6. Gamispatulus ferrilongus n. sp.—adult female. A urosome, ventral view. B intercoxal sclerites and intercoxal plates. C fifth pedigerous somite and genital double-somite, dorsal view. D antenna, second endopodal segment with a distal pore (white arrowhead) and middle claw with fossa on concave margin (black arrowhead). Ap = anterior processes. isI to isIV = first to fourth intercoxal sclerites. ipI to ipIII = first to third intercoxal plates. P5 = fifth leg. Pp = posterior processes. S1 to S4 = seta 1 to seta 4. A, B, C, D—holotype INPA 2521. Scale bars in micrometers (µm).

FIGURE 5. Gamispatulus ferrilongus n in Two Gamispatulus Thatcher & Boger, 1984 (Cyclopoida: Ergasilidae) from Schizodon intermedius Garavello & Britski (Actinopterygii: Anostomidae), with description of a new species

FIGURE 5. Gamispatulus ferrilongus n. sp.—adult female. A body, dorsal view. B cephalothorax, dorsal view. C second pedigerous somite, dorsal view, with paired integumental windows laterally on tergite (arrowhead). D rostral spine. E antennule. Ae = aesthetascs. A, C—holotype INPA 2521. B, D—paratype INPA 2522a. E—paratype INPA 2524a. Scale bars in micrometers (µm).

FIGURE 3 in Two Gamispatulus Thatcher & Boger, 1984 (Cyclopoida: Ergasilidae) from Schizodon intermedius Garavello & Britski (Actinopterygii: Anostomidae), with description of a new species

FIGURE 3. Gamispatulus schizodontis Thatcher & Boeger, 1984—adult female. A buccal apparatus. B labrum. C mandible. D maxilla, syncoxa with pore (arrowhead). Ab = anterior blade. Pb = posterior blade. A, C, D, E—Specimen INPA 2529b. Scale bars in micrometers (µm).

FIGURE 2 in Two Gamispatulus Thatcher & Boger, 1984 (Cyclopoida: Ergasilidae) from Schizodon intermedius Garavello & Britski (Actinopterygii: Anostomidae), with description of a new species

FIGURE 2. Gamispatulus schizodontis Thatcher & Boeger, 1984—adult female. A intercoxal sclerites and intercoxal plates, ventral view. B urosome, ventral view. C antenna, middle claw with fossa on concave margin (arrowhead). D antennule. Ae = aesthetascs. isI to isIV = first to fourth intercoxal sclerites. ipI to ipIII = first to third intercoxal plates. P5 = fifth leg. S1 = seta 1. S2 = seta 2. A, B, C—Specimen INPA 2527a. D—Specimen INPA 2529a. Scale bars in micrometers (µm).

FIGURE 2 in Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae)

FIGURE 2. Caenotropus schizodon, SEM of bifid premaxillary teeth, MCP 30101, 81.84 mm SL, Rio Peixoto de Azevedo, Mato Grosso. Brazil.

FIGURE 1. Caenotropus schizodon n in Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae)

FIGURE 1. Caenotropus schizodon n. sp., holotype, MCP 29971, 71.53 mm SL, Rio Arinos, Mato Grosso, Brazil.

FIGURE 4 in Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae)

FIGURE 4. Cladogram of the most parsimonious hypothesis of phylogenetic relationships of Caenotropus species. Numbered synapomorphies correspond to those of Vari et al. (1995). See text for additional information. Additional character: S, bifid teeth.

FIGURE 3 in Caenotropus schizodon, a new chilodontid fish from the Rio Tapajós drainage, Brazil (Ostariophysi: Characiformes: Chilodontidae)

FIGURE 3. Caenotropus schizodon, upper jaw showing functional and replacement teeth (mesial view) in a stained specimen, MCP 16953, 48.86 mm SL, Rio Tapajós, Amazonas.

FIGURE 7 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)

FIGURE 7. Mouth position of species of Schizodon with caudal peduncle blotch. A) Schizodon altoparanae, LISDEBE 5830, 230 mm SL; B) S. knerii, LISDEBE 7903, 208 mm SL; C) S. nasutus, LISDEBE 6679, 219 mm SL; D) S. unimaculatus, LISEDEBE 7902, 240 mm SL. Scale bar = 10.0 mm.

FIGURE 6 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)

FIGURE 6. Canonical discriminate component analysis of Schizodon nasutus (black dots), S. unimaculatus (white squares), and S. altoparanae (crosses) along CV1 and CV2 axis.

FIGURE 5 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)

FIGURE 5. Principal component analysis (PCA) on samples of Schizodon knerii (black dots) and Schizodon unimaculatus (white squares) along PC1 and PC2 axis.

FIGURE 4 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)

FIGURE 4. Principal component analysis (PCA) on samples of Schizodon nasutus (black circles) and S. unimaculatus (white squares) along PC1 and PC2 axis.

FIGURE 3 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)

FIGURE 3. Principal component analysis (PCA) on samples of Schizodon altoparanae (black circles) and S. unimaculatus (white squares) along PC1 and PC2 axis.

FIGURE 1. Schizodon unimaculatus, MZUSP 129259 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)

FIGURE 1. Schizodon unimaculatus, MZUSP 129259, holotype, 265 mm SL, Rio São Francisco, Canindé do São Francisco, Sergipe, Brazil.

FIGURE 2 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)

FIGURE 2. Geographic distribution of Schizodon unimaculatus (red stars) and related species of Schizodon. Symbols may represent more than one sampling site.