Origins and relationships of colonial Heliophyllum in the upper Middle Devonian (Givetian) of New York
Boletin - Real Sociedad Espanola de Historia Natural: Seccion Geologica
By: W. A. Oliver Jr.
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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.
Suggested Citation
Oliver, W.A., 1997, Origins and relationships of colonial Heliophyllum in the upper Middle Devonian (Givetian) of New York: Boletin - Real Sociedad Espanola de Historia Natural: Seccion Geologica, v. 91, no. 1-4, p. 53-60.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Origins and relationships of colonial Heliophyllum in the upper Middle Devonian (Givetian) of New York |
| Series title | Boletin - Real Sociedad Espanola de Historia Natural: Seccion Geologica |
| Volume | 91 |
| Issue | 1-4 |
| Year Published | 1997 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Boletin - Real Sociedad Espanola de Historia Natural: Seccion Geologica |
| First page | 53 |
| Last page | 60 |