Prof. Mark Gibbons

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https://hdl.handle.net/10566/1537

Prof. Mark Gibbons

Position: HOD
Department: Biodiversity and Conservation Biology Programme
Faculty: Faculty of Natural Science
Qualifications: BSc(Hons), PhD
Tel: 021 959 2475
Fax: 021 959 2312
Email: mgibbons@uwc.ac.za

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Browsing by Author "Gershwin, Lisa-Ann"

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    Carybdea branchi, sp. nov., a new box jellyfish (Cnidaria: Cubozoa) from South Africa.
    (Magnolia Press, 2009) Gershwin, Lisa-Ann; Gibbons, Mark J.
    A common and conspicuous member of the medusan fauna of South Africa has been the subject of repeated taxonomic confusion. After having been mistakenly identified by earlier workers as either Carybdea alata or Tamoya haplonema, this large and colourful carybdeid is described herein as Carybdea branchi, sp. nov. It is distinguished from its congeners on numerous characters: body to about 8cm in life, densely scattered with nematocyst warts over the whole body and abaxial keels of the pedalia; a bulge or lateral thorn on the pedalial canal bend; with 2 dendritic velarial canals per octant, highly diverticulated; with a long manubrium; with greatly bushy epaulette-like phacellae, comprising 20 or more roots tightly clustered; with well developed mesenteries; and with conspicuous brownish pigmented areas over the proximal and distal regions of the pedalia and over the phacellae. A comparative table of the primary diagnostic characters of species in the genus Carybdea is given.
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    A modern description of Crambionella stuhlmanni (Scyphozoa: Rhizostomeae) from St. Lucia Estuary, South Africa
    (Cambridge University Press, 2011) Neethling, Simone; Channing, Alan; Gershwin, Lisa-Ann; Gibbons, Mark J.
    A new record of Crambionella stuhlmanni is reported from the east coast of South Africa. The material is described using quantitative morphological data, and mitochondrial (CO1) and nuclear (ITS-1) sequence data. The species can be diagnosed by a combination of morphological features including the presence of conical projections on velar lappets, the absence of orbicular appendages among mouthlets and the short length of the terminal club on the oral arm. Mitochondrial sequence data unambiguously delineate C. stuhlmanni as a separate species from C. orsini, and phylogenetic analyses support its placement within the monophyletic genus, Crambionella