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Palaeobiogeographic implications of Middle Permian brachiopods from Johore (Peninsular Malaysia)

MASATOSHI SONE^*,, IAN METCALFE^* and MOHD SHAFEEA LEMAN^*,

^* Asia Centre, University of New England, Armidale, NSW 2351, Australia
School of Environmental Sciences and Natural Resources, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia

Author for correspondence: msone2{at}pobox.une.edu.au

A new Middle Permian locality in northern Johore, Peninsular Malaysia, yields a small-sized, but compositionally unique, brachiopod fauna consisting of eight species: Pseudoleptodus sp., Caricula cf. salebrosa Grant, Neochonetes (Nongtaia) aff. arabicus (Hudson & Sudbury), Karavankina sp., Transennatia cf. insculpta (Grant), Hustedia sp., Orthothetina sp., and martiniid indet. The first four genera are new records for Malaysia; in particular, the rare taxa Pseudoleptodus and Caricula characterize the fauna. The brachiopods occur together with the ammonoid Agathiceras sp., the nautiloid Foordiceras? sp., bivalves, and crinoid stems. The locality belongs to the East Malaya terrane of the Cathaysian biotic region, but some affinities to species of the Sibumasu province are recognized. The Malaysian forms of Pseudoleptodus, Caricula and Transennatia are similar to those of the Ratburi Limestone (southern Thailand). A Roadian–early Wordian age is interpreted for the Johore fauna. The similarity of brachiopods reported here with those from the Ratburi Limestone suggests that there was species interchange or one-way migration between shallow waters of East Malaya and Sibumasu across the main Palaeo-Tethys. The Tethyan seaway between the two terranes must have been narrower than previously interpreted by some authors to allow such faunal traffic during the Roadian–Wordian time period.

Key Words: Permian • Malaysia • brachiopods • palaeobiogeography

This article has been cited by other articles:

				W. He, G. R. Shi, B. Jianjun, and Z. Niu A New Brachiopod Fauna from the Early to Middle Permian of Southern Qinghai Province, Northwest China Journal of Paleontology, July 1, 2008; 82(4): 811 - 822. [Abstract] [Full Text] [PDF]