LEONOVA, T. B., MOHD SHAFEEA LEMAN and SHI, G. R., 1999:08:31.  Discovery of an Early
       Permian (Late Sakmarian) ammonoid from Langkawi Island, Malaysia.  Alcheringa 23,
       277-281.  ISSN 0311-5518.
       This paper describes a single specimen of Metalegoceras sp. recently discovered from
   the upper part of the Singa Formation at Batu Asah on the main Langkawi Island off the
   northwestern coast of Peninsular Malaysia.  The discovery represents the first report of a
   Permian ammonoid from the island md from the Singa Formation and confims a Sakmarian
   (Early Permian) age for this part of the formation suggested by brachiopods.