Shark teeth from Rio de Janeiro shellmounds.

<p>(1a-b) <i>Carcharias taurus</i>, upper tooth, Usiminas, MNUFRJ-ZA-565. (2a-b) <i>Alopias superciliosus</i>, upper tooth, Saquarema, MNUFRJ-ZA-Col.L.Kneip 28151. (3a-b) <i>Carcharodon carcharias</i>, upper tooth, Algodão, MNUFRJ-ZA-02. (4a-b) <i>Isurus oxyrinchus</i>, upper tooth, Algodão, MNUFRJ-ZA-21. (5a-b) <i>Lamna nasus</i>, lower tooth, Algodão, MNUFRJ-ZA-16. (6a-b) <i>Carcharhinus acronotus</i>, upper tooth, Algodão, MNUFRJ-ZA-01. (7a-b) <i>Sphyrna mokarran</i>, lower tooth, Major, MNUFRJ-ZA-149. (8a-b) <i>Carcharhinus limbatus</i>, upper tooth, Algodão, MNUFRJ-ZA-05. (9a-b) <i>Carcharhinus plumbeus</i>, upper tooth, Algodão, MNUFRJ-ZA-44. (10a-b) <i>Galeocerdo cuvier</i>, tooth, Algodão, MNUFRJ-ZA-17. (11a-b) <i>Negaprion brevirostris</i>, upper tooth, Algodão, MNUFRJ-ZA-25. (12a-b) <i>Rhizoprionodon lalandii</i>, lower tooth, Bigode, MNUFRJ-ZA-87, and (13a-b) upper tooth, Algodão, MNUFRJ-ZA-70. (14a-b) <i>Rhizoprionodon porosus</i>, upper tooth, Bigode, MNUFRJ-ZA-88. (15a-b) <i>Sphyrna mokarran</i>, upper tooth, Caieira II, MNUFRJ-ZA-99. (16a-b) <i>Sphyrna zygaena</i>, lower tooth, Major, MNUFRJ-ZA-161. Scale bar: 1 cm. Views: labial (1b, 2a-5a, 6b, 7a, 8-10b, 11-13a, 14-15b, and 16a), lingual (1a, 2-5b, 6a, 7b, 8-10a, 11-13b, 14-15a, and 16b).