<i>‘Nodibeyrichia jurassica’</i> and associated beyrichiacean ostracode species and their significance for the correlation of late Silurian strata in the Baltic and Britain

  • Hansch W
  • Siveter D
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Abstract

<p><strong>Abstract.</strong> Taxonomic revision reveals that the beyrichiacean ostracode <i>‘Nodibeyrichia jurassica’</i> can no longer be regarded as an index species for the uppermost (late Přídolí) ostracode ‘zone’ of the Silurian of the Baltic region embracing Estonia, Latvia and Baltic-floor derived erratic boulders. The taxon <i>Nodibeyrichia jurassica</i> Sarv, 1968 <i>(non</i> Gailite 1967) is regarded as a junior subjective synonym of <i>Beyrichia protuberans</i> Boll, 1862. Moreover, the material hitherto assigned to <i>‘Nodibeyrichia jurassica’</i> is herein considered to belong to two species: <i>Nodibeyrichia protuberans</i> (Boll, 1862) and <i>Nodibeyrichia verrucosa</i> Shaw, 1969. <i>N. verrucosa</i> occurs in England and Estonia, in the basal part and upper part of the Přídolí Series respectively. <i>N. protuberans,</i> as herein restricted, can be used to recognize the late Přídolí, uppermost ostracode assemblage level <i>(N. jurassica</i> Zone of previous literature) of the Silurian only in the central East Baltic (Latvia) and in erratic boulder material found in southern Baltic areas.</p>

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APA

Hansch, W., & Siveter, D. J. (1994). &lt;i&gt;‘Nodibeyrichia jurassica’&lt;/i&gt; and associated beyrichiacean ostracode species and their significance for the correlation of late Silurian strata in the Baltic and Britain. Journal of Micropalaeontology, 13(2), 81–91. https://doi.org/10.1144/jm.13.2.81

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