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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Dental wear and oral food processing in Caiman latirostris: analogue for fossil crocodylians with crushing teeth
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Dental wear and oral food processing in Caiman latirostris: analogue for fossil crocodylians with crushing teeth

机译：凯门鳄（Caiman latirostris）的牙齿磨损和口腔食品加工：化石鳄齿破碎的类似物

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摘要

Almost all of the 23 extant species of crocodylians are opportunistic predators that con-sume their food without extensive intraoral food processing. Posterior bulbous crushing teeth with heavy dental wear in two specimens of Caiman latirostris, however, indicate that oral food process-ing can be an important factor during feeding. Wear pattern analysis in two specimens of C. latiros-tris clearly indicates crushing of hard food items that produced large wear surfaces on tooth crowns in the posterior part of the tooth row. This type of wear suggests that the diet was predominantly composed of durable, hard-shelled prey (e.g. molluscs, crustaceans, turtles), a supposition confirmed by recent studies on the stomach contents of several C. latirostris specimens. The absence of similar wear patterns in other ontogenetically mature specimens of C. latirostris, however, indicates that spe-cific, possibly regional differences in food resources might affect the degree and type of dental wear. The dental features we report in C. latirostris can provide an important extant analogue for fossil forms with similar dentitions (e.g. Bernissartia, Unasuchus and globidontan eusuchians).
机译：在现存的23种鳄鱼中，几乎所有都是机会掠食性动物，它们在不进行大量口内食物加工的情况下食用它们的食物。然而，在两个凯门鳄（Caiman latirostris）标本中，后球形球磨牙使牙齿严重磨损，表明口腔食物加工可能是喂养期间的重要因素。在两个C. latiros-tris标本中的磨损模式分析清楚地表明，硬质食品的压碎导致在牙齿排后部的牙冠上产生较大的磨损表面。这种穿戴方式表明饮食主要由耐用的，带壳的猎物（例如软体动物，甲壳类动物，海龟）组成，这一假设已被最近对数个纬线梭菌标本的胃内容物的研究所证实。然而，在其他个体发育成熟的C. latirostris标本中，没有类似的磨损模式，这表明食物资源的特定，可能是区域差异可能会影响牙齿磨损的程度和类型。我们在C. latirostris中报告的牙齿特征可以为具有相似牙列的化石形式（例如Bernissartia，Unasuchus和globidontan eusuchians）提供重要的现存类似物。

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