Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and raysJohn Tee-Van Sears Foundation for Marine Research, Yale Univ., 1953 |
Dall'interno del libro
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Pagina 13
... fins , the first originating over or anterior to the pelvics ; a large caudal fin ; pectoral fins attached to head only a little past the gills ; outer margins of pelvics straight or convex ; the paired fins , as well as the unpaired ...
... fins , the first originating over or anterior to the pelvics ; a large caudal fin ; pectoral fins attached to head only a little past the gills ; outer margins of pelvics straight or convex ; the paired fins , as well as the unpaired ...
Pagina 44
... caudal , including the degree of elevation of its axis , and according to the position of the dorsal fins relative to the pelvics . Key to Families 1a . Caudal fin conspicuously bilobed , more or less lunate in form , both lobes sharp ...
... caudal , including the degree of elevation of its axis , and according to the position of the dorsal fins relative to the pelvics . Key to Families 1a . Caudal fin conspicuously bilobed , more or less lunate in form , both lobes sharp ...
Pagina 552
... fin , from the second by the smoothness of the upper margin of its caudal fin.106 Description . Proportional dimensions in per cent of distance between snout and origin of upper caudal fin . Males , 545 and 558 mm long to origin of ...
... fin , from the second by the smoothness of the upper margin of its caudal fin.106 Description . Proportional dimensions in per cent of distance between snout and origin of upper caudal fin . Males , 545 and 558 mm long to origin of ...
Sommario
SAWFISHES GUITARFISHES SKATES and RAYS | 1 |
Suborder Myliobatoidea | 331 |
Dasyatis say | 378 |
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Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Visualizzazione estratti - 1953 |
Fishes of the Western North Atlantic: Sawfishes, guitarfishes, skates and rays John Tee-Van Visualizzazione estratti - 1948 |
Parole e frasi comuni
Acad Amer axils of pectorals batoids Bigelow and Schroeder biol Brazil breadth Bull Carolina cartilage caudal fin center of cloaca Chesapeake Bay claspers Coast color comp concave Copeia Dasyatis Dermal denticles descr distance between inner dorsal fin embryos Evermann exposed nostrils eyes fathoms female Florida Fowler front of mouth front of orbits Garman genus gill openings Gulf Gulf of Maine Harv Hist inner ends Jersey Jordan Lacépède length of base Linnaeus listed lobe long as distance Lower surface mature males Müller and Henle Narcine nasal curtain pectoral fins pelvic fins Philad Poiss posterior margin prickles Proc Raja rearward Rio de Janeiro rostral rounded Sawfishes side Skates spiracles Study Material tail spine teeth thorns tip of snout tip of tail Torpedo transverse Trygon type species U. S. Bur U. S. Comm U. S. nat upper surface Woods Hole Zool