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首页> 外文期刊>Proceedings of the Arkansas Academy of Science >Subspecific Recognition in Arkansas Ringsneck Snakes (Diadophis punctatus)
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Subspecific Recognition in Arkansas Ringsneck Snakes (Diadophis punctatus)

机译：阿肯色环蛇（Diadophis punctatus）的亚种识别

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摘要

In his treatise on the morphology of ringneck snakes, Blanchard (1942) described the distribution of the two subspecies of ringneck snakes in Arkansas [Mississippi ringneck (D. punctatus stictogenys) and prairie ringneck (D. punctatus arnyi)] as being "south of the Ozark uplands. . ." and "the higher parts of Arkansas", respectively. Blanchard drew his conclusions based on only a very limited sample (n = 11) of these snakes from Arkansas. Since then, range maps, beginning with one by Wright and Wright (1957) and followed by those of Conant (1958, 1975) and Conant and Collins (1991), have generally followed Blanchard by separating the two subspecies along a boundary which generally splits the two natural physiographic regions of the state into the Mississippi Delta and Gulf Coastal Plain (the lowlands) and the Interior Highlands (Ozark Mountains in the north and the Ouachita Mountains in the south). As a rule, this boundary between natural divisions does not prevent range extensions between the two regions by most terrestrial snakes. However, exceptions include the ranges of a few highly aquatic snakes of the lowlands as illustrated by Conant and Collins (1991) [e.g., the western mud snake (Farancia abacura reinwardtii) and the broad-banded water-snake (Nerodia fasciata confluens)]; these snakes are not distributed into the highland region and are presumably limited by the abrupt rise in relief features at the edge of the highlands (Fig. 1).
机译：Blanchard（1942）在其关于环颈蛇形态的论文中，将环颈蛇的两个亚种描述为在阿肯色州[密西西比环颈（D. punctatus stictogenys）和大草原环颈（D. punctatus arnyi）]的分布。欧扎克高地……”和“阿肯色州的较高地区”。 Blanchard仅基于来自阿肯色州的这些蛇的非常有限的样本（n = 11）得出了结论。从那时起，范围图，首先是Wright和Wright（1957）的地图，然后是Conant（1958，1975）和Conant and Collins（1991）的地图，通常沿着Blanchard沿边界线将两个亚种分开，以跟随Blanchard。该州的两个自然地理区域分别是密西西比河三角洲和墨西哥湾沿岸平原（低地）和内陆高地（北部的奥扎克山脉和南部的瓦希托山脉）。通常，自然划分之间的边界不会阻止大多数陆生蛇在两个区域之间的范围扩展。但是，例外情况包括一些由Conant和Collins（1991）举例说明的低地高度水生蛇的范围[例如，西部泥蛇（Farancia abacura reinwardtii）和宽带蛇（Nerodia fasciata confluens）]。 ;这些蛇没有分布到高地地区，可能受到高地边缘浮雕特征突然上升的限制（图1）。

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