Annals of the South African Museum, Volume 89The Museum, 1982 - Natural history |
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Page 27
... pairs of well - developed ribs to the pleural fields with very deep interpleural furrows . The ' Type II ' pygidia are closer to B. herscheli in showing 12 or more axial rings , but still with only 6-7 pairs of pleural ribs ...
... pairs of well - developed ribs to the pleural fields with very deep interpleural furrows . The ' Type II ' pygidia are closer to B. herscheli in showing 12 or more axial rings , but still with only 6-7 pairs of pleural ribs ...
Page 72
... pairs of minute pleural spines , and lacks a terminal spine . The material assigned by Clarke ( 1913 , pl . 5 ( figs 10-15 ) ) to this species differs in possessing deep , transverse 2p furrows and at least 5 pairs of pleural spines to ...
... pairs of minute pleural spines , and lacks a terminal spine . The material assigned by Clarke ( 1913 , pl . 5 ( figs 10-15 ) ) to this species differs in possessing deep , transverse 2p furrows and at least 5 pairs of pleural spines to ...
Page 155
... pairs of pronounced ribs , narrower than the interspaces , and a very weakly developed fifth pair to the posterior . Each rib bears a small but distinct node - like tubercle at the fulcrum axis . The ribs weaken towards the entire ...
... pairs of pronounced ribs , narrower than the interspaces , and a very weakly developed fifth pair to the posterior . Each rib bears a small but distinct node - like tubercle at the fulcrum axis . The ribs weaken towards the entire ...
Contents
Family Otarionidae | 14 |
Family Dalmanitidae | 45 |
Family Synphoriidae | 51 |
Copyright | |
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Common terms and phrases
2p furrows 9 fig abaxially Acropyga adaxial Anoplolepis anteriorly apodemal pits distally apomorphic arbuteus Lake axial furrows axial rings axis Bainella baini Baldis bulla Burmeisteria herscheli Murchison Calmonia cephalon Clarke Cryphaeus custodiens Dalmanites deep Devonian distinct Douvilleiceras Eldredge & BraniĊĦa exsag external cochlear foramen eyes facial suture faunas figured Francovichia frontal lobe gamkaensis Gamonedaspis genal angles genera genus glabella Gydo Formation Histriophoca holotype Homalonotus internal moulds Kozlowski Kozlowskiaspis L1 lobes lateral view lectotype Lobodontini Malvinokaffric margin material median Metacryphaeus Mirounga Miroungini moderately convex monachines Monachus Monotherium narrow occipital furrow occipital ring ocellus Oosthuizenella Oxytropidoceras Pennaia petrosal Phacopina Phacops Phoca phocids pleural fields pleural grooves posterior border furrows Potamotherium preserved as internal pugnacious pygidial pygidium Reed Rennie Renniella ribs ring furrows sagittal length Schwarz segmentation Semantor semantorids slightly South African Museum specimens strongly subfamily suckers synapomorphy thorax transverse trilobites tubercles Typhloniscus ventral weakly width Wolfart Zone