This report presents a systematic revision of the Tertiary species of the common reef-building coral Hydnophora. Major diagnostic characters of the various Tertiary genera that have been commonly confused with Hydnophora (Leptoria, Monticulastraea, Staminocoenia, Michelottiphyllia and Angeliphyllia) are defined and subsequently compared in order to establish differences and synonymies. With the exception of Leptoria, all other genera are considered synonyms of Hydnophora. The forty-five Tertiary species ascribed to Hydnophora, or to synonymous genera, have been revised and type material analyzed. Collected material from Oligocene Italian localities and Miocene localities from Somalia and Pakistan has been also analyzed in order to provide a consistent taxonomy for distinguishing species within the genus, especially for the Mediterranean Tertiary. According to this report, of the forty-five species of Hydnophora previously described, only twenty-one appear to be distinct. The Tertiary distribution of the genus, which started in the Late Paleocene, clearly shows that species richness increased significantly from Paleocene to Miocene. Originations of species were mostly concentrated during two time intervals, respectively the Chattian for the Mediterranean and the Burdigalian for Eastern Tethys. As regards the Mediterranean, the genus developed only during Chattian time with five fully described species. The genus became extinct in both Caribbean and western-central Mediterranean regions at the end of the Oligocene and subsequently developed in eastern Tethys regions during the Miocene. A new name is proposed for the only Paleocene species: Hydnophora gregoryi.
|Anno di pubblicazione:||1999|
|Titolo:||The scleractinian genus Hydnophora (revision of Tertiary species).|
|Appare nelle tipologie:||Articolo su rivista|
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