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Cranidial and pygidial measurements, and cranidial landmark data of Sahtuia carcajouensis and Mackenzieaspis parallelispinosa

Description: This dataset contains measurements and landmark data taken from two species of middle Cambrian trilobite from the Northwest Territories of Canada. This was conducted to quantify their growth and development. Following collection, specimens were prepared in the laboratory, coated in ammonium chloride sublimate, and then photographed, either with a Nikon DSLR camera, or an Olympus SZX-16 microscope. Linear measurements and landmark positions were collected from photos using the software ImageJ version 1.53. Linear measurements were taken from the cranidia and pygidia, and landmarks were only collected from the cranidia. Specimens are labeled as either their Geological Survey of Canada type number (published specimens) or as their original designation number (unpublished specimens). Linear measurements of cranidia and pygidia are expressed in millimeters, whereas landmark data are expressed as x and y coordinates. Landmarks have been fitted using Bookstein method, calculated in Past4.04.
Authors: Handkamer, Neal M.; University of Saskatchewan; ORCID iD 0000-0002-9927-7856
Keywords: Trilobites
Field of Research: 
Earth and related environmental sciences
Paleontology (including palynology)

Earth and related environmental sciences
Publication Date: 2024-03-22
Publisher: Federated Research Data Repository / dépôt fédéré de données de recherche
Funder: Natural Sciences and Engineering Research Council of Canada; Discovery Grant
Polar Knowledge Canada; Northern Scientific Training Program Grant
Geographic Coverage: 
Place Name
Carcajou Falls
Province /
Province / Territory
Northwest Territories
Geographic Point: 

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Access to this dataset is subject to the following terms:
Creative Commons Attribution 4.0 International (CC BY 4.0)
Handkamer, N. (2024). Cranidial and pygidial measurements, and cranidial landmark data of Sahtuia carcajouensis and Mackenzieaspis parallelispinosa. Federated Research Data Repository.