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
Risultati 1-3 di 88
Pagina 21
... western tropical Pacific chiefly reflects the imperfection of the published record . Species . The species of Pristis are separable into two groups according to whether the caudal has a distinct lower lobe or not . This distinction is ...
... western tropical Pacific chiefly reflects the imperfection of the published record . Species . The species of Pristis are separable into two groups according to whether the caudal has a distinct lower lobe or not . This distinction is ...
Pagina 53
... western side of the Atlantic fall in the group in which the snouts are relatively long , in which the anterior nasal flaps do not extend inward onto the internarial space , and in which there are two folds on the posterior margin of the ...
... western side of the Atlantic fall in the group in which the snouts are relatively long , in which the anterior nasal flaps do not extend inward onto the internarial space , and in which there are two folds on the posterior margin of the ...
Pagina 165
... western Atlantic form . Thus we conclude that R. bathyphila is a well marked species rather than a young stage of R. lintea as has been suggested.85 Size . The young are hatched at a length less than 117 mm ( our smallest specimen ) ...
... western Atlantic form . Thus we conclude that R. bathyphila is a well marked species rather than a young stage of R. lintea as has been suggested.85 Size . The young are hatched at a length less than 117 mm ( our smallest specimen ) ...
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