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The brachiopod genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky

Professional Paper 1066-M

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Abstract

The orthid brachiopod genera Hebertella, Dalmanella, and Heterorthina are abundant in Middle and Upper Ordovician strata in Kentucky. 'Nine species are described: Hebertella frankfortensis Foerste; H. parksensis Foerste; H. occidentalis (Hall); Dalmanella bassleri Foerste; D. fertilis (Ulrich); D. meeki (Miller); D. multisecta (Meek); D. sulcata Cooper; and Heterorthina macfarlani Neuman. The species designations Hebertella sinuata (Hall), H. subjugata (Hall), and H. latasulcata Foerste are placed in synonymy with H. occidentalis (Hall). The stratigraphic distribution of each species is given. Large collections of silicified specimens allowed the recognition of the considerable variability characteristic of most of the species. External morphology distinguishes species of Hebertella, whereas internal features are critical to recognition of species of Dalmanella and Heterorthina.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
The brachiopod genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky
Series title:
Professional Paper
Series number:
1066
Chapter:
M
Edition:
-
Year Published:
1982
Language:
ENGLISH
Description:
17 p.; 5 plates