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971 results for “Southwestern Atlantic”
FIGURE 44 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 44. Pattern of foramina on neurocranial preorbital wall Squatina species. A) Squatina occulta (NUPEC 1452, adult, head only). B) Squatina guggenheim (UERJ 791, adult female, 735 mm TL). C) Squatina argentina (UERJ 795, adult, head only) Abbreviations as in Fig. 41, with addition of: onc, orbitonasal canal. Dorsal side facing top. Not to scale.
FIGURE 32 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 32. Specimen of Squatina sp. in dorsal (A) and ventral (B) views (MNRJ 30190, juvenile female, continental shelf of Bahia state, Brazil, 690 mm TL).
FIGURE 31 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 31. Map of Southeastern South America showing geographical distribution of Squatina argentina and Squatina sp. Star depicts approximate holotype locality (S. argentina) and triangle represents the locality of the only specimen of Squatina sp. For abbreviations, see Fig. 16.
FIGURE 30 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 30. Dermal denticles of Squatina argentina from posterior region of dorsal midline of UERJ 0975 (A) and MCP 3754 (B). Midline row denticle (C), and single small, dorsal denticle (D) of MCP 3754 in higher magnification. Covering denticles and single denticle (F) of pectoral fin dorsal surface. Notice that the denticle in F has only three crown ridges. Anterior to top.
FIGURE 43 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 43. Neurocranium of Squatina argentina (MOFURG 457, juvenile male, continental shelf of Rio Grande county, Rio Grande do Sul state, 359 mm TL) in dorsal (A), ventral (B), lateral (C) and occipital (D) views. Abbreviations as in Fig. 41. Anterior to top in A, B; facing left in C.
FIGURE 39 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 39. Anterior region of tail in lectotype of S. dumeril (MNHN A-9692) in dorsal view (A), and dermal denticles of dorsal midline on caudal region, anterior to first dorsal fin (B). Arrows indicate dermal denticles with basal plate slightly larger than surrounding denticles. Anterior to left.
FIGURE 29 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 29. Morphological details of symphysial tooth morphology in Squatina argentina. Left upper tooth row of specimen MCP 3754 in labial (A), lateral (B), and lingual (C) views (for upper teeth, refer to upper scale bar). Left lower tooth row of specimen UERJ 0975 in labial (D) view, and specimen MCP 3754 in lateral (E) and lingual (F) views (for lower teeth, refer to lower scale bar).
FIGURE 24 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 24. Specimen of Squatina argentina in dorsal (A) and ventral (B) views (UERJ 0975, juvenile male, continental shelf of Rio Grande do Sul state, Brazil, 646 mm TL). Arrow indicates the 'shoulder' on anterior margin of pectoral fin.
FIGURE 23 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 23. Map of Southeastern South America showing geographical distribution of Squatina guggenheim. Star depicts approximately holotype locality. Localities may represent more than one specimen. For abbreviations, see Fig. 16.
FIGURE 50 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 50. Clasper skeleton of S. guggenheim (NUPEC 1649, adult male, continental shelf of Southestern Brazil, 872 mm TL) in dorsal (A) and ventral (B) views. Abbreviations: acd, accessory dorsal marginal cartilage; acv, accessory ventral marginal cartilage; ax, axial cartilage; bp, basipterygium; dm, dorsal marginal cartilage; dt, dorsal terminal cartilage; dt2, dorsal terminal 2 cartilage; gcr, globular cartilaginous rod; pvr, pelvic radials; stj, stem-joint cartilagesw; sty, end-style; vm, ventral marginal cartilage; vt, ventral terminal cartilage; vt2, ventral terminal 2 cartilage. Anterior to top.
FIGURE 35 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 35. Morphological details of head skeleton from radiograph of Squatina sp. (MNRJ 30190), in dorsoventral view. Abbreviations are as in Figs. 41, 45 and 47.
FIGURE 21 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 21. Dermal denticles in Squatina guggenheim from posterior region of dorsal midline of MZUSP 110869 in dorsal (A) and lateral (B) views. Midline row denticle (C), and single small, dorsal denticle (D) in MZUSP 110869. Covering denticles of median region of pectoral fin dorsal surface (E) in MZUSP 110869. Dermal denticles on axil of pectoral fin origin showing three aligned enlarged dermal denticles (F) in NUPEC 1295 (juvenile male, Santos county, São Paulo state, Brazil, 370 mm TL). Anterior to top.
FIGURE 19 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 19. Fresh coloration in Squatina guggenheim (MZUSP 110869, juvenile male, São Sebastião county, São Paulo state, Brazil, 597 mm TL). Dorsal coloration with mucous (A) and without mucous in dorsal (B) and ventral (C) views. Notice on right pectoral fin the presence of backish spots, present in mucous, exactly over the whitish spots.
FIGURE 18 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 18. Anterior region of trunk, pectoral and pelvic fin dorsal surface in Squatina guggenheim, showing variation in dorsal coloration and spot pattern in specimens studied. A) MZUSP 43102 (adult female, continental shelf of São Paulo state, Brazil, 846 mm TL). B) NUPEC 1649 (adult male, Continental shelf of Southwestern Brazil, 872 mm TL). C) MZUSP 110869 (juvenile male, São Sebastião county, São Paulo state, Brazil, 597 mm TL). D) NUPEC 1214 (juvenile male, Santos county, São Paulo state, Brazil, 337 mm TL). E) NUPEC 1074 (juvenile female, Guaratiba county, Rio de Janeiro state, Brazil, 527 mm TL). F) MZUSP 43101 (juvenile female, continental shelf of São Paulo state, Brazil, 631 mm TL). G) NUPEC 1118 (juvenile male, Santos county, São Paulo state, Brazil, 255 mm TL). H) MNRJ 32534 (juvenile male, continental shelf of Rio de Janeiro state, Brazil, 468 mm TL). Anterior to left.
FIGURE 28 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 28. Neonate specimen of Squatina argentina (MZUSP 73170, neonate female, continental shelf of Santa Catarina state, Brazil, 280 mm TL). Arrow indicates the yolk-sac connection completely closed by muscles; however, the scar is not completely closed.
FIGURE 26 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 26. Specimens of Squatina argentina showing color variation. A, B) MOFURG 457 (juvenile male, continental shelf of Rio Grande county, Rio Grande do Sul state, 359 mm TL). C) MOFURG 434 (juvenile female, continental shelf of Rio Grande county, Rio Grande do Sul state, 334 mm TL).
FIGURE 15 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 15. Morphological details of Squatina guggenheim; specimens NUPEC P20 (A, C, E, F), NUPEC 1269 (B), and NUPEC 1649 (D). A, B) Dorsal view of head. B) Ventral view of head and pectoral region. C) Ventral view of pelvic fins. D) Outer edge of pectoral fin with enlarged dermal denticles on apex showing a sexual dimorphism. E) Lateral view of dorsal fins. F) Lateral view of caudal fin. Scale bar = 50 mm.
FIGURE 17 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 17. Clasper external morphology in Squatina guggenheim (NUPEC 1649, adult male, 872 mm TL). A) Photograph of dorsal aspect of clasper. B) Illustration of dorsal view of clasper morphology. C) Details of clasper with the glans spread. Anterior facing top of page. Abbreviations: apo, apopyle; cg, clasper groove; crh, cover rhiphidion; hyp, hypopyle; psp, pseudopera; rh, rhiphidion. Anterior to top. Scale bar = 20 mm.
FIGURE 14 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 14. Specimens of Squatina guggenheim showing variation in dorsal color and prominence of enlarged midline row of denticles. A) NUPEC P20 (adult female, no locality data, 954 mm TL). B) NUPEC 1174 (juvenile female, 593 mm TL, Laje de Santos, São Paulo state, Brazil, 593 mm TL). C) NUPEC 1074 (juvenile female, Guaratiba county, Rio de Janeiro state, Brazil, 527 mm TL).
FIGURE 16 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 16. Juvenile specimens of Squatina guggenheim showing variation in enlarged midline row of denticles. A) MZUSP 110868 (juvenile female, continental shelf of Southeastern Brazil, 496 mm TL). B) NUPEC 1214 (juvenile male, Santos county, São Paulo state, Brazil, 425 mm TL). C) NUPEC 1118 (juvenile male, Santos county, São Paulo state, Brazil, 255 mm TL). Anterior to left.
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International Brain Laboratory public data
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OpenNeuro
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