Chemosymbiotic bivalves from Miocene methane-seep carbonates in Italy
Abstract
Eleven species of chemosymbiotic bivalves are reported from middle to late Miocene methane seep deposits ('Calcari aLucina') in the Italian Apennines, including seven new species and one new genus. The new species areBathymodiolus(s.l.)moroniaeandB. (s.l.)miomediterraneusamong the Bathymodiolinae andArchivesica aharoni,A.apenninica,A.strigarum, and 'Pliocardia'italicaamong the Vesicomyidae; specimens from the middle Miocene of Deruta are reported asArchivesicaaff.aharoni.Samiolus iohannesbaptistaenew genus new species is introduced for an unusual mytilid with a commarginally ribbed surface, which might be the first non-bathymodiolin mytilid obligate to the seep environment. The two large lucinid species from which these deposits derived their informal name 'Calcari aLucina' are identified asMeganodontia hoernea(Des Moulins, 1868) andLucinoma perusina(Sacco, 1901). WithChanellaxinussp., we report the first thyasirid from a Neogene deep-water seep deposit in Italy and the first fossil occurrence of this genus.
- Publication:
-
Journal of Paleontology
- Pub Date:
- May 2017
- DOI:
- 10.1017/jpa.2016.154
- Bibcode:
- 2017JPal...91..444K