Return to search

Two-dimensional landmark analysis of Spinocyrtid brachiopods of Euramerica during the Givetian

Recent inquiry into the nomenclature of several species within Spinocyrtia has led to questions concerning name applicability and validity, particularly whether Delthyris granulosa and Spinocyrtia (Spirifer) granulosa are synonymous. This study utilized two-dimensional outline landmark analysis, a form of geometric morphometric analysis, to evaluate interspecific variation among these species. I took over a thousand photographs of over a hundred specimens of brachiopods belonging to the family Spinocyrtiidae. Ninety-six specimens originated from the Givetian outcrop belt of New York state, three were from northwestern Ohio, there was single Canadian specimen, and there was a single German specimen. The results from these analyses indicate that the mophospaces of Spinocyrtia (Spirifer) congesta, S. (Spirifer) granulosa, and S?. (Spirifer) marcyi are statistically (p < 0.05) distinct from one another.

Identiferoai:union.ndltd.org:uiowa.edu/oai:ir.uiowa.edu:etd-7277
Date01 August 2017
CreatorsLayng, Alexander Patrick
ContributorsTierney-Cramer, Kate, Foster, Charles Thomas, 1949-
PublisherUniversity of Iowa
Source SetsUniversity of Iowa
LanguageEnglish
Detected LanguageEnglish
Typethesis
Formatapplication/pdf
SourceTheses and Dissertations
RightsCopyright © 2017 Alexander Patrick Layng

Page generated in 0.0021 seconds