Ammonite SPHENODISCUS LENTICULARIS (Owen, 1852) [Originally Ammonites lenticularis] Ammonites lenticularis was named by Owen (1852). It is not a trace fossil. It was recombined as Sphenodiscus lenticularis by Böse (1928) and Kennedy (1986). Both sides of this handsome specimen display the extraordinarily INTRICATE SUTURE patterns that are characteristic of this species. Also evident is part of the beautifully iridescent nacreous layer. A laterally flattened ammonite, this animal is thought to have been a relatively FAST SWIMMER. [LOCALITY: Fox Hills Formation. South Dakota, USA] [HORIZON: Late Cretaceous, Lower Maastrichtian (~ 70 mya)] [SOURCE: Wikipedia and paleodb.org/?a=checkTaxonInfo&taxon_no=130911&is_rea] [PHOTO Ed.: D. K. Srivastava]
Posted on: Sat, 13 Jul 2013 10:39:03 +0000