Annals of the South African Museum, Volume 89The Museum, 1982 - Natural history |
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Page 130
... spines are absent from the posterolateral margins of the hypostoma on the internal mould . Thorax . The thorax has a rather broad axis , about one - third of the thoracic width , which tapers slightly to the posterior . The axial rings ...
... spines are absent from the posterolateral margins of the hypostoma on the internal mould . Thorax . The thorax has a rather broad axis , about one - third of the thoracic width , which tapers slightly to the posterior . The axial rings ...
Page 139
... spines and are separated by well - defined , narrow interpleural grooves . At the fulcral axis , the posterior moiety of each pleura develops a fulcral spine of variable prominence , in some individuals almost as long as the axial spines ...
... spines and are separated by well - defined , narrow interpleural grooves . At the fulcral axis , the posterior moiety of each pleura develops a fulcral spine of variable prominence , in some individuals almost as long as the axial spines ...
Page 143
... spine . Metacryphaeus boulei ( Kozlowski ) bears a remarkable homoeomorphic resemblance to this species in features of the cephalon , but lacks axial and fulcral spines , as well as a terminal spine to the pygidium . In features of the ...
... spine . Metacryphaeus boulei ( Kozlowski ) bears a remarkable homoeomorphic resemblance to this species in features of the cephalon , but lacks axial and fulcral spines , as well as a terminal spine to the pygidium . In features of the ...
Contents
Family Otarionidae | 14 |
Family Dalmanitidae | 45 |
Genus Gamonedaspis | 54 |
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 fauna Francovichia frontal lobe gamkaensis Gamonedaspis genal angles genera genus geol glabella 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 Muizon narrow occipital furrow occipital ring ocellus Oosthuizenella Oxytropidoceras Pennaia petrosal Phacopina Phacops Phoca phocids pleural fields pleural grooves post-axial posterior border furrows Potamotherium preserved as internal pugnacious pygidial pygidium Reed Rennie Renniella ribs ring furrows sagittal length Schwarz seals segmentation Semantor semantorids slightly South African Museum specimens strongly subfamily suckers synapomorphy thorax transverse trilobites tubercles Typhloniscus ventral weakly width Wolfart