STRUCTURE OF DIGITAL SETAE OF LIZARDS
STRUCTURE OF DIGITAL SETAE OF LIZARDS
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DOI：
10.1002/jmor.1051170302
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发表时间：
1965-01-01
影响因子：
1.5
通讯作者：
ERNST, V
中科院分区：
文献类型：
--
作者：
RUIBAL, R;ERNST, V
光镜和电镜研究表明，趾板状刚毛的壁虎和anoline蜥蜴的刚毛的自由端由扁平的抹刀的宽度小于1 [mu]。刚毛是简单的结构，长度通常小于30 [mu]，每个刚毛有一个单一的末端刮刀。与此相反，壁虎的刚毛是复杂的结构，长度约为100 [mu]，有许多分支，每个刚毛有许多刮刀。Gekko和Aristelliger的抹刀（宽0.2[长破折号]0.4 [mu]）比Anolis的抹刀（宽0.8[mu]）小。电子显微镜研究表明，蜥蜴的鳞片上似乎覆盖着小的表皮刺（1.5 [mu]长）。变色龙和壁虎的刚毛被认为是从这些更原始的表皮刺独立进化而来的。它进一步表明，机制，使薄层粘附到基层是一个表面现象。刮铲提供与底层接触的大表面，从而产生大的总摩擦力。蜥蜴角质层的a层可以很容易地在薄板中识别出来。然而，[β]层的结构不容易解释，并且有证据表明Oberhautchen和外层表面皮肤中的层之间存在纤维层。
Light and electron microscope studies of the digital lamellar setae of geckos and anoline lizards demonstrate that the free ends of the setae consist of flattened spatulas of less than 1 [mu] in width. The anoline setae are simple structures usually less than 30 [mu] in length and with a single terminal spatula to each seta. In contrast the setae of geckos are complex structures of about 100 [mu] in length, with numerous branchings, and having many spatulas per seta. The spatulas of Gekko and Aristelliger were smaller (0.2[long dash]0.4 [mu] in width) than the spatulas of Anolis (0.8[mu] in width). The electron microscope studies indicate that the scales of lizards appear to be covered with small epidermal spines (1.5 [mu] long). The setae of anoles and geckos are considered to have evolved independently from these more primitive epidermal spines. It is further suggested that the mechanism that allows the lamellae to adhere to the substratum is a surface phenomenon. The spatulas provide a large surface that is in contact with the substratum and thus produces a large total frictional force. The a layer of the lizard stratum corneum can be readily identified in the lamellae. However, the structure of the [beta] layer is not easily interpreted and there is evidence of a fibrous layer between the Oberhautchen and the layer in the skin of the outer lamellar surface.