Reference

There is no explicit mention of who highly commended Helen Morningstar's work on the "Pottsville Fauna of Ohio" in the search results provided. However, the significant recognition of her work generally comes from the publication by the Ohio Geological Survey, and it has been meticulously cataloged and referenced in multiple paleontological and geological studies.

To find the specific person or organization that highly commended Morningstar's work, it would be best to refer to detailed historical or academic sources, such as academic journals, reviews from the time of publication, or specific sections in detailed biographies or books dedicated to her life and work.

For more details on her work, you can refer to sources such as the Biodiversity Heritage Library or the Library of Congress.