. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. THE STATUS OF GREGARIELLA SIMPLICIFILIS BARNARD 129. Fig. 3. Lithophaga aristata (Solander) Remarks Lithophaga aristata was found to be very common, boring between the tubes of the mollusc Vermetus adansoni Daudin, which cover the rocks at the lower levels of the shore at Praia das Conchas, Mocamedes. Discussion A comparison of the mytilid faunas of southern Angola and northern South West Africa indicates that the occurrence of Perna perna and the cryptic species Modiolus carvalhoi and Gregariella ba
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. THE STATUS OF GREGARIELLA SIMPLICIFILIS BARNARD 129. Fig. 3. Lithophaga aristata (Solander) Remarks Lithophaga aristata was found to be very common, boring between the tubes of the mollusc Vermetus adansoni Daudin, which cover the rocks at the lower levels of the shore at Praia das Conchas, Mocamedes. Discussion A comparison of the mytilid faunas of southern Angola and northern South West Africa indicates that the occurrence of Perna perna and the cryptic species Modiolus carvalhoi and Gregariella barbatella are the same on the two adjacent stretches of coast. However, from Cabo Negro northwards, Semimytilus algosus is replaced by Brachydontes puniceus. The coast of Angola south of Mocamedes is mainly sandy or consists of vertical sandstone cliffs dropping sharply into the sea, so that the development of an extensive rocky intertidal fauna is discouraged. This inhospitable stretch of coast may assist existing temperature barriers in inhibiting the southward and northward spread of species. Summary The mytilid fauna of southern Angola is compared with that of northern South West Africa. Gregariella simplicifilis Barnard is synonymized with Gre- gariella barbatella (Cantraine). A description and figure are given of a specimen of Gregariella from Novo Redondo which could not be placed in any existing Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
