Annals of the South African MuseumThe Museum, 1973 - Natural history |
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Page 55
... southern African rajids will be discussed . TABLE I Predorsal caudal vertebral counts ( Vprd ) for southern African Rajidae . Species B. smithii No. of Range Mean specimens 6 68-71 69,2 R. straeleni R. clavata 4 48-52 49,3 10 45-53 47,7 ...
... southern African rajids will be discussed . TABLE I Predorsal caudal vertebral counts ( Vprd ) for southern African Rajidae . Species B. smithii No. of Range Mean specimens 6 68-71 69,2 R. straeleni R. clavata 4 48-52 49,3 10 45-53 47,7 ...
Page 86
... African region has therefore always formed an effective barrier zone to the migration of the Rajidae . The southern African region has therefore been one of secondary coloniza- tion rather than primary development , and the Rajidae can ...
... African region has therefore always formed an effective barrier zone to the migration of the Rajidae . The southern African region has therefore been one of secondary coloniza- tion rather than primary development , and the Rajidae can ...
Page 88
... southern African region , are shown in Figures 58 , 59 , while the frequency of occurrence is given in Table 3. The sampling data does not allow for comment on the relative abundance at various depths and hence the variation in depth ...
... southern African region , are shown in Figures 58 , 59 , while the frequency of occurrence is given in Table 3. The sampling data does not allow for comment on the relative abundance at various depths and hence the variation in depth ...
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Common terms and phrases
a.tr-accessory terminal accessory terminal Amblyraja Anacanthobatis americanus ax-axial axial cartilage Bathyraja smithii Fig Bigelow & Schroeder Bonde & Swart Cape Point Cartilages of right cavity clasper glans clasper structure cleft Cruriraja parcomaculata Cruriraja triangularis d.tr-dorsal terminal dermal denticles developed Dipturus distal distal end distribution dorsal lobe dorsal terminal dorsal terminal cartilages elongate fontanelle foramen formed genus genus Cruriraja glans Hulley iliac regions Ishiyama & Hubbs Leigh-Sharpe leopardus Leucoraja metres mg d Myliobatis cervus nasal capsules neurocranium outer lateral margin pecten pelvic girdle posterior prepelvic processes proximal pseudorhipidion pseudosiphon Raja caudaspinosa Raja clavata Raja doutrei Raja miraletus Raja pullopunctata Raja radiata Raja wallacei Rajella Rajidae Rajoidea ravidula Rhinobatidae Rhinobatos annulatus Rhinobatos halavi Rhinoraja rhipidion robertsi rostral rostral cartilage Rostroraja Scale 2,0 cm sentinel southern African Rajidae southern African region species Raja spike springeri Stehmann stenorhynchus subgenus subgenus Raja temperature terminal cartilage ventral terminal cartilage view of right wallacei Fig