| Abstract: | Heliophyllum halli Milne-Edwards and Haime is common to abundant in many Lower and Middle Devonian stratigraphic units in New York. Most Heliophyllum are solitary, but both branching and massive colonies are known. Four ‘populations‘ of colonial Heliophyllum in the Givetian part of the sequence are distinct, as is a fifth form that occurs through the section. Each of the colonial forms is interpreted as an independent derivative of solitary forms of H. halli. The relationships appear to range from infrasubspecific to specific, and it is suggested that the complex should be recognized as the Heliophyllum halli species group. |
| Genre: | Article |
| ProdID: | 70019119 |
| Citation Author: | Oliver, W. A. , Jr. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 60 |
| Citation Issue: | 1-4 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Boletin - Real Sociedad Espanola de Historia Natural: Seccion Geologica |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 8 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Origins and relationships of colonial Heliophyllum in the upper Middle Devonian (Givetian) of New York; 1997; Article; Journal; Boletin - Real Sociedad Espanola de Historia Natural: Seccion Geologica; Oliver, W. A. , Jr. |
| Citation Start Page: | 53 |
| Citation Volume: | 91 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Origins and relationships of colonial Heliophyllum in the upper Middle Devonian (Givetian) of New York; 1997; Article; Journal; Boletin - Real Sociedad Espanola de Historia Natural: Seccion Geologica; Oliver, W. A. , Jr. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
| Publisher: | |
