Archive

The discovery of late Cambrian fossils in the Bowers Group of Northern Victoria Land, Antarctica, provides the first reliable evidence for the age of basement sedimentary rocks in the region.

• Read more about Late Cambrian Brachiopoda, Mollusca, and Trilobita from Northern Victoria Land, Antarctica

The bryozoans Repiomultisparsa incrustans d'Orbigny and Mesenteripora undulata (Michelin) constructed multilamellar zoaria composed of a succession of overgrowing zooecial layers. The lanonomic status of the two species is reviewed briefly, and a mode of formation of the multilamellar zoarium common to both species is described. This involves overgrowth of old zooecia by young zooecia budded at C-shaped growth margins, the two ends of which remain stationary and function as points about which growth pivots.

• Read more about Multilamellar growth in two Jurassic cyclostomatous Bryozoa

Lower Cambrian life and death assemblages of late Atdabanian-Botomian age are described from the Wilkawillina Limestone of South Australia. The biota, sedimenlology, and diagenesis arc analysed to reveal an ecological succession in which archacocyalhids grew one upon another, and were overgrown by the problematic organism Renalcis, with the cavities later filled by pseudostromatolites (coniatolites). A low-latitude, littoral habitat is inferred.

• Read more about Early Cambrian intergrowths of archaeocyathids, Renalcis, and pseudostromatolites from South Australia

• Read more about The taxonomic position of the chalicotheriid perissodactyl Kyzylkakhippus orlovi from the Oligocene of Kazakhstan

A single specimen (part and counterpart) of a new genus and species, Odontogriphus omalus, from the Burgess Shale (middle Cambrian) is described. Despite poor preservation its affinities appear to lie with the lophophorates. The simple lophophore contains tooth-like elements that are similar to certain Cambrian conodonts. It is suggested that this new genus and species is an example of a conodontophorid.

• Read more about A new Cambrian lophophorate from the Burgess Shale of British Columbia

• Read more about Upper Palaeocene Salviniaceae from the Woolwich/Reading Beds near Cobham, Kent

• Read more about A Westphalian eurypterid from South Wales

• Read more about Late middle Cambrian agnostid trilobites from north-western Tasmania

• Read more about Globorotalia crassula (Foraminiferida): Blow's interpretation considered biometrically

• Read more about Tertiary and Pleistocene crabs from Barbados and Trinidad