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FIGURE 12 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 12. Holotype of Squatina guggenheim in dorsal (A) view (MACN 0978, juvenile male, Necochea, Province of Buenos Aires, Argentina, 670 mm TL) and non-type specimen in dorsal (B) view (MOFURG 19, adult male, continental shelf of Rio Grande county, Rio Grande do Sul state, Brazil, 773 mm TL). C) Details of caudal insertion and row of enlarged denticles over dorsal midline of specimen MOFURG 19. Arrows indicates enlarged midline dermal denticles.
FIGURE 11 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 11. Map of Southeastern South America showing geographical distribution of Squatina occulta. Star inside white circle depicts approximate locality of holotype; black stars demonstrate approximate localities of paratypes. Localities may represent more than one specimen. Abbreviations: AR, Argentina; BA, Bahia state; ES, Espírito Santo state; PR, Paraná state; RJ, Rio de Janeiro state; RS, Rio Grande do Sul state; SC, Santa Catarina state; SP, São Paulo state; Uruguay.
FIGURE 13 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 13. Specimens of Squatina guggenheim showing variation in dorsal color and prominence of enlarged midline row of denticles. Dorsal (A) and ventral (B) view of NUPEC 1649 (adult male, continental shelf of Southeastern Brazil, 872 mm TL). C) Dorsal view of NUPEC 1115 (pre-adult, Laje de Santos, São Paulo state, Brazil, 781 mm TL).
FIGURE 10 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 10. Clasper external morphology from paratype of S. occulta (MZUSP 41518). Abbreviations: cg, clasper groove; crh, cover rhipidion. Anterior to top.
FIGURE 8 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 8. Juvenile specimen of Squatina occulta (NUPEC 1128, juvenile male, Ilha da Vitória, São Paulo state, Brazil, 388 mm TL) presenting a visible row of dermal denticles along dorsal midline in dorsal (A) view. Details of dorsal coloration over trunk, pectoral and pelvic fins (B). Dorsal view of caudal insertion (C). Arrow indicates midline row of denticles.
FIGURE 9 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 9. Dermal denticles of Squatina occulta from posterior region of dorsal midline row in NUPEC 1275 (A) and NUPEC 1213 (B). Single small, dorsal denticle of NUPEC 1213 (C) and midline row denticle of NUPEC 1275 (D) in higher magnification. Covering dermal denticles over dorsal pectoral surface of NUPEC 1213 (E), and single enlarged dermal denticle over cephalic region of NUPEC 1275 (F). Anterior to top.
FIGURE 7 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 7. Morphological details of teeth from first mesial vertical rows in Squatina occulta (NUPEC 1452, adult, head only). Left upper tooth row in labial (A), lateral (B), lingual (C) and root ventral (D) views (for upper teeth, refer to upper scale bar). Left lower tooth row in root (E), labial (F), lateral (G) and lingual (H) views (for lower teeth, refer to lower scale bar).
FIGURE 42 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 42. Neurocranium of Squatina guggenheim (MZUSP 110869, juvenile male, São Sebastião county, São Paulo state, Brazil, 597 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 4 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 4. Morphological variation of Squatina aculta in pectoral fin anterior margin in dorsal (A) and ventral (B) views of specimen MZUSP 110866 (juvenile male, continental shelf of southeastern Brazil, 426 mm TL) and dorsal (C) view of specimen NUPEC 1255 (juvenile male, Ilha da Vitória, São Paulo state, Brazil, 366 mm TL). Arrow indicates the 'shoulder' on anterior margin.
FIGURE 6 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 6. Anterior region of trunk, pectoral and pelvic fins, in dorsal view, of Squatina occulta, showing some of variation in dorsal coloration and pattern of spots in specimens studied. A) NUPEC 1259 (juvenile male, Ilha da Vitória, São Paulo state, Brazil, 366 mm TL). B) MZUSP 110866 (juvenile male, continental shelf of southeastern Brazil, 426 mm TL). C) MCP 13999 (preadult female, continental shelf of Rio Grande do Sul state, Brazil, 903 mm TL). D) MZUSP 41518 (preadult male, continental shelf of Rio Grande do Sul state, Brazil, 975 mm TL). E) NUPEC 1651 (juvenile male, continental shelf of southeastern Brazil, 743 mm TL. F) MZUSP 42851 (juvenile male, Rio Grande do Sul state, Brazil, 516 mm TL). G) NUPEC 2192 (juvenile male, continental shelf of Southeastern Brazil, 448 mm TL). H) NUPEC 1255 (juvenile male, Ilha da Vitória, São Paulo state, Brazil, 366 mm TL). Anterior to left.
FIGURE 5 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 5. Morphological details of Squatina acculta in paratype MZUSP 41518 (A, C–F) and NUPEC 1259 (B). A, B) Dorsal view of head. C) Ventral view of head and pectoral region. D) Ventral view of pelvic fins. E) Lateral view of dorsal fins. F) Lateral view of caudal fin. Scale bar = 50 mm.
FIGURE 27 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 27. Specimens of Squatina argentina showing variation on pectoral fin anterior margin. The arrow indicates that anterior margin of pectoral fin is only weakly convex. A, B) MNHN 1984.33 (juvenile female, continental shelf of Uruguay, 392 mm TL). C) MCP 3754 (juvenile female, continental shelf between Uruguay and Argentina, 392 mm TL).
FIGURE 3 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 3. Specimens of Squatina occulta, showing dorsal color variation, in dorsal view. A) MZUSP 42851, juvenile male, Rio Grande do Sul state, Brazil, 516 mm TL B) NUPEC 0147, juvenile male, Ilha do Bom Abrigo, São Paulo state, Brazil, 515 mm TL C) NUPEC 1106, juvenile male, Guaratiba county, Rio de Janeiro state, Brazil (315 mm TL).
FIGURE 22 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 22. Enlarged midline denticles in adults of Squatina guggenheim showing a significant reduction in size, in specimens NUPEC 20 (A, C, E) and MZUSP 43102 (B, D, F). Arrows indicates midline row of denticles. Notice that the greater the specimen, the less prominent is the enlarged midline row of denticles. Anterior facing left.
FIGURE 25 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 25. Morphological details of Squatina argentina in specimens UERJ 0975 (A, B, C, D, F) and MCP 3754 (E). A) Dorsal view of head. B) Ventral view of head and anterior region of pectoral fin. C) Dorsal view of anterior region of trunk, pectoral and pelvic fins. D) Ventral view of pelvic fins. E) Lateral view of dorsal fins. F) Lateral view of caudal fin. Arrows indicate interspiracular region lacking enlarged dermal denticles. Scale bar = 30 mm.
FIGURE 41 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 41. Neurocranium of Squatina occulta (NUPEC 2192, juvenile male, continental shelf of Southeastern Brazil, 448 mm TL) in dorsal (A), ventral (B), lateral (C) and occipital (D) views. Abbreviations: af, anterior fontanelle; bp, basal plate; btp, basitrabecular process; ecf, ethmoidal canal foramen; elf, endolymphatic foramen; epf, external profundus foramen; fm, foramen magnum; hf, hyomandibular facet; icf, internal carotid foramen; jc, jugular canal; lc, lateral commissure; lpp, lower postorbital process; na, nasal aperture; nc, nasal capsule; nf, nasal foramen; oaf, orbital artery foramen; occ, occipital condyle; oec, otic external canal; og, orbital groove; ohc, occipital hemicentrum; pcf, preorbital canal foramen; pef, pseudobranchial artery foramen; pf, pineal fontanelle; plf, perilimphatic foramen; pop, postorbital process; pp, pterotic process; pvf, posterior vein foramen; rp, rostral projections; soc, supraorbital crest; sr, sphenopterotic ridge; vhj, ventral hyoid junction; II, optic nerve foramen; III, oculomotor nerve foramen; IV, trochlear nerve foramen; V, trigeminal nerve foramen; VI, abducens nerve foramen; VII oft, foramina for rami of superficial ophthalmic nerve; IX, glossopharyngeal nerve foramen; X, vagus nerve foramen. Anterior to top in A, B; facing left in C.
FIGURE 34 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 34. Dermal denticles of Squatina sp. (MNRJ 30190: A–C) from posterior region of dorsal midline (A). Dermal denticles from interspiracular region, near right (B) and left spiracle (C). Dermal denticles from interspiracular region of Squatina argentina (MCP 3754), showing lack of enlarged denticles (D). Single enlarged dermal denticles on interspiracular region in (E) Squatina occulta (NUPEC 1227) and (F) Squatina guggenheim (MZUSP 110869). Figures A, B and D, anterior to left; figures C, E and F, anterior to top.
FIGURE 40 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 40. Sensory canal system of Squatina species. A) General aspect of canal system based on NUPEC 1275 (juvenile female, 362 mm TL). B) Details of cephalic canals based on NUPEC 2192 (juvenile male, 448 mm TL).
FIGURE 38 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 38. Morphological details of Squatina dumeril (MNHN A-9692). A) Dorsal view of head. B) Dorsal view of pectoral fin. C) Labial view of lower jaw showing the tooth rows. D) Apex of pectoral fin outer edge with enlarged dermal denticles showing sexual dimorphism. E) Lateral view of dorsal fins. F) Dorsal view of clasper. Abbreviations: crh, cover rhiphidion; dd, enlarged dermal denticles; rh, rhiphidion. Scale bar = 50 mm.
FIGURE 46 in Morphological and taxonomic revision of species of Squatina from the Southwestern Atlantic Ocean (Chondrichthyes: Squatiniformes: Squatinidae)
FIGURE 46. Visceral arches of S. guggenheim (MZUSP 110870, juvenile female, continental shelf of Southestern Brazil, 449 mm TL) in dorsal (A) and ventral (B) views. Arrow indicates the lateral extension of the condyle on Meckel's cartilage for articulation with palatoquadrate. Abbreviations as in Fig. 46. Anterior to top.
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