Annals of the South African Museum, Volume 89The Museum, 1982 - Natural history |
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Page 100
... Cephalon . The cephalon is semicircular , much broader ( trans . ) than long ( sag . ) , with the cephalon diverging strongly to the anterior . The frontal lobe is subrhomboidal , with a prominent posterior median impression and no ...
... Cephalon . The cephalon is semicircular , much broader ( trans . ) than long ( sag . ) , with the cephalon diverging strongly to the anterior . The frontal lobe is subrhomboidal , with a prominent posterior median impression and no ...
Page 121
... cephalon and glabella , the latter bluntly rounded anteriorly and with a distinct anterior border . The L1 lobes are narrower ( exsag . ) and longer ( trans . ) than is typical of Pennaia , and the 2p furrows are much more weakly ...
... cephalon and glabella , the latter bluntly rounded anteriorly and with a distinct anterior border . The L1 lobes are narrower ( exsag . ) and longer ( trans . ) than is typical of Pennaia , and the 2p furrows are much more weakly ...
Page 122
... cephalon , larger eyes , narrower ( exsag . ) L1 lobes , weaker 2p furrows that become obsolete distally , and genal spines . Phacopina convexa Eldredge & Braniša ( 1980 : 248 , figs 2B , 22-23A ) also has a more rounded cephalon and ...
... cephalon , larger eyes , narrower ( exsag . ) L1 lobes , weaker 2p furrows that become obsolete distally , and genal spines . Phacopina convexa Eldredge & Braniša ( 1980 : 248 , figs 2B , 22-23A ) also has a more rounded cephalon and ...
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 & Braniša 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