Paterimitra pyramidalis Laurie, 1986, the first tommotiid discovered from the early Cambrian of North China

Bing Pan, Glenn A. Brock, Christian B. Skovsted, Marissa J. Betts, Timothy P. Topper, Guoxiang Li*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    The eccentrothecimorph tommotiid Paterimitra pyramidalis Laurie, 1986, was previously only known from lower Cambrian rocks of the Northern Territory and South Australia. Herein, we document the first occurrence of P. pyramidalis from the Xinji Formation in the Shuiyu section at Ruicheng County, Shanxi Province, located at the southwestern margin of the North China Platform. This represents the first report of a tommotiid taxon from lower Cambrian strata of the North China Platform. All three sclerite types that characterise the scleritome of P. pyramidalis have been recovered and are described, permitting definitive identification to species level. The discovery of P. pyramidalis from the North China Platform not only greatly extends the palaeogeographic range of this distinctive tommotiid taxon, but also supports planktotrophic development of larvae in Paterimitra as a stem group brachiopod. The discovery of P. pyramidalis supports a Cambrian, Epoch 2, late Age 3 to early Age 4 age for the shelly fossil fauna from the Xinji Formation and indicates a close palaeogeographic position between the North China Platform and Australian East Gondwana during the early Cambrian.

    Original languageEnglish
    Pages (from-to)179-185
    Number of pages7
    JournalGondwana Research
    Volume63
    DOIs
    Publication statusPublished - Nov 2018

    Keywords

    • Tommotiida
    • Paterimitra
    • North China
    • Cambrian Epoch 2
    • biostratigraphy
    • palaeobiogeography

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