Description after Gilbert 1967 [#946]:
Teeth sometimes weakly serrate in 15 or 16-1 or 2-15 or 16 large individuals; first tooth smaller than second, the 15th and 16th very small; teeth 1 through 3 in upper jaw nearly symmetrical and erect, with the subsequent teeth becoming increasingly oblique toward corners of mouth; cusps present on all teeth; lower teeth with somewhat narrower cusps than uppers, similarly oblique, but with successive series tending to become more erect and their cusps relatively more narrow with growth.
Figure 10. Sphyrna lewini: juvenile female, 639 mm. TL, from Rio de Janeiro, Brazil (MCZ 462); b, ventral view of head; c, upper and lower teeth, left side, about 0.55 X; d, fourth upper tooth; e, twelfth upper tooth; f, third lower tooth; g, eleventh lower tooth; h, dermal denticles, about 42 X . (d-g, about natural size.) (From Bigelow and Schroeder, 1948, p. 415.)
Material: female, ? cm TL, American Museum of Natural History, coll. nr. 7949/SD, Georgia, off McIntosh, WCAD (31°19'N, 79°42'W), coll. by Naylor, GJP, 7.5.1991
Images: © Ross Robertson, Smithsonian Tropical Research Institute, Panama, images shows the correct position of the teeth;
Material: female, 285 cm TL,weight: 250 lbs, collection: Jaws International, Gordon Hubbell, Florida
Material: sex?, ? TL,, collection: Natural History Museum of Los Angeles County, nr. 39387-1, Eastern Atlantic, Senegal