Annals of the South African Museum, Volume 89The Museum, 1982 - Natural history |
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Page 195
... foramen . The Phocini show a tendency toward closure of this foramen , but it is never hermetically obstructed as in some Monachinae . The phocine petrosal generally has an inflated promontorium and a swollen apex . Thus , the phocine ...
... foramen . The Phocini show a tendency toward closure of this foramen , but it is never hermetically obstructed as in some Monachinae . The phocine petrosal generally has an inflated promontorium and a swollen apex . Thus , the phocine ...
Page 196
... foramen tends to disappear and the bulla very often covers the petrosal posteriorly . These two features are never as well marked and constant as in the Lobodon- tini and a mastoid lip is not present . Erignathus clearly shows the ...
... foramen tends to disappear and the bulla very often covers the petrosal posteriorly . These two features are never as well marked and constant as in the Lobodon- tini and a mastoid lip is not present . Erignathus clearly shows the ...
Page 199
... foramen differs from that of Monachus and the Cystophorini . In Mirounga the foramen is wide open and is not partially obstructed by an expansion of the bulla . This contrasts with the Phocinae in which there is a tendency for it to be ...
... foramen differs from that of Monachus and the Cystophorini . In Mirounga the foramen is wide open and is not partially obstructed by an expansion of the bulla . This contrasts with the Phocinae in which there is a tendency for it to be ...
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