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Conspecificity of two pocket mice, Perognathus goldmani and P. artus

Written by E. Raymond (Eugene Raymond) Hall,Marilyn Bailey Ogilvie

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Pocket mice

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About this book

"Conspecificity of two pocket mice, Perognathus goldmani and P. artus" by E. Raymond Hall and Marilyn Bailey Ogilvie is a scientific publication produced in the late 1950s. This work explores the taxonomic relationship between two species of pocket mice, analyzing their morphological traits and geographical distribution. It contributes to the understanding of the species within the broader Perognathus intermedius group, focusing particularly on the intergradation of the two types in southern Sonora and northern Sinaloa. In the publication, the authors examine specimens collected from various locations, noting significant measurable differences between the two species, such as size and skull structure. The study finds evidence of intergradation in the populations, leading to the conclusion that Perognathus artus should be classified as a subspecies of Perognathus goldmani. The research includes detailed descriptions of the physical characteristics of the mice, maps of their geographic distribution, and discussions on individual variation among the specimens, emphasizing the need for further study into related species to refine taxonomic understanding.

Reading guide

Themes, characters and key ideas in Conspecificity of two pocket mice, Perognathus goldmani and P. artus, written by Chaptra AI.

  • about 8 hours
  • advanced
  • Analytical
  • Empirical
  • Objective

Hall and Ogilvie's 1950s scientific publication, "Conspecificity of two pocket mice, Perognathus goldmani and P. artus," meticulously investigates the taxonomic relationship between two previously distinct species of pocket mice. Through detailed morphological analysis of collected specimens and examination of their geographical distribution, the authors identify significant measurable differences, particularly in size and skull structure. However, evidence of intergradation in populations from southern Sonora and northern Sinaloa leads to the pivotal conclusion that *Perognathus artus* should be reclassified as a subspecies of *Perognathus goldmani*. This work significantly refines the understanding of the *Perognathus intermedius* group, emphasizing the dynamic nature of species classification based on empirical data.

“This work explores the taxonomic relationship between two species of pocket mice, analyzing their morphological traits and geographical distribution.”

Key themes

Taxonomy and Classification
This is the central theme, exploring the principles and challenges of classifying organisms. The paper directly grapples with the question of how to delineate species and subspecies based on empirical evidence, contributing to the ongoing scientific discourse on biological classification.
Speciation and Intergradation
The theme investigates the process by which new species arise (speciation) and, crucially, the phenomenon of intergradation, where distinct populations or species interbreed in zones of overlap. This concept is pivotal to the paper's conclusion, demonstrating that species boundaries are not always sharp and can be dynamic.
Morphological Variation and Measurement
This theme underscores the importance of precise quantitative and qualitative measurement of physical characteristics in biological research. The paper relies heavily on identifying and analyzing measurable differences and similarities between specimens to draw taxonomic conclusions, highlighting the foundational role of observational science.

Worth discussing

How does the concept of 'intergradation' challenge strict definitions of species boundaries, and what are its implications for taxonomy?

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