Tagasi otsingusse
Stein & Bergström, 2012
A complete styginid trilobite from the Ordovician of Sweden
Stein, M., Bergström, J.
DOI | 10.1007/s12542-012-0132-6 |
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Aasta | 2012 |
Ajakiri | Paläontologische Zeitschrift |
Köide | 86 |
Number | 3 |
Leheküljed | 275-280 |
Tüüp | artikkel ajakirjas |
Keel | inglise |
Id | 48892 |
Abstrakt
Styginidae are a small group of trilobite species, which are usually rare and most of which are incompletely known. Here we describe a complete specimen of Raymondaspis grandigena n.sp. from the Middle Ordovician (Darriwilian, upper Arenig) of Sweden. Among the group it has an unusual combination of exceptionally large genal spines, a thorax with notably short pleural spines in the anterior tergites, and a wide concave pygidial margin. The hypostome is documented for the first time in situ in a styginid, and its attachment can be best described as semi-impendent.
Viimati muudetud: 29.2.2024