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Cover of Morphological Variation in a Population of the Snake, Tantilla gracilis Baird and Girard

Morphological Variation in a Population of the Snake, Tantilla gracilis Baird and Girard

Written by Charles J. Cole,Laurence M. Hardy

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ReptilesSnakesFlat-headed snake

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About this book

"Morphological Variation in a Population of the Snake, Tantilla gracilis Baird and Girard" by Laurence M. Hardy and Charles J. Cole is a scientific publication written in the late 20th century. This study explores the morphological variations found among a population of the flat-headed snake, "Tantilla gracilis", specifically focusing on specimens collected in Kansas during the late 1930s to early 1940s. The authors aim to provide a comprehensive evaluation of the snake's taxonomic characteristics and examine potential variations relevant to its classification. The book presents a detailed analysis of the morphological traits of 246 specimens, examining various external and maxillary characteristics, including scale counts, ventral and subcaudal numbers, and the structure of the maxillae. The study reports that a significant proportion of the specimens display atypical characteristics compared to the common traits expected for the species. The authors also evaluate past research on "Tantilla gracilis", addressing the perceived need for the recognition of subspecies based on variations observed. Ultimately, Hardy and Cole conclude that the variations do not warrant separate subspecies classification, supporting the idea that the differences within the population are not significant enough to define distinct taxonomic groups.

Reading guide

Themes, characters and key ideas in Morphological Variation in a Population of the Snake, Tantilla gracilis Baird and Girard, written by Chaptra AI.

  • about 10 hours
  • advanced
  • objective
  • rigorous
  • empirical

This scientific monograph, authored by Cole and Hardy, meticulously details the morphological variation observed within a specific population of the snake species, *Tantilla gracilis* (Baird and Girard). The study employs rigorous morphometric analysis to quantify differences in physical characteristics among individuals, aiming to understand the extent and patterns of intraspecific variation. It investigates various metrics such as scale counts, body proportions, and coloration, drawing conclusions about the species' plasticity and the potential implications for its taxonomy and ecological adaptations. The work serves as a foundational reference for understanding population-level diversity in this particular snake.

“"Our findings indicate a significant degree of intraspecific variation in several key morphological characters within the studied population of *Tantilla gracilis*."”

Key themes

Intraspecific Variation
This is the central theme, exploring the natural range of differences in physical traits among individuals within the same species. The monograph meticulously quantifies and describes these variations, such as differences in scale counts, body proportions, and coloration, to understand the extent of phenotypic plasticity and genetic diversity within the *Tantilla gracilis* population.
Morphometrics and Biostatistics
This theme focuses on the scientific methodologies employed to measure and analyze biological forms. The book is an exemplar of applying precise measurement techniques to morphological characters and using advanced statistical methods to interpret complex biological data, drawing statistically sound conclusions about patterns of variation.
Taxonomy and Systematics
The study of morphological variation directly informs the classification and evolutionary relationships of species. This theme explores how the observed variations contribute to or challenge existing taxonomic definitions of *Tantilla gracilis*, potentially aiding in the identification of subspecies or distinct populations, and clarifying its position within the genus *Tantilla*.

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What are the implications of the observed morphological variation for the taxonomic classification of *Tantilla gracilis*?

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