Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumSouth African Museum, 1992 - Natural history |
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Page 93
... elongate tubercles on the inner edge of the umbilical wall . Very strong , rounded tubercles occur at or slightly ... elongated bullae low on the flank , no obvious tubercles ( but a thickened rib ) at the ventrolateral shoulder , and ...
... elongate tubercles on the inner edge of the umbilical wall . Very strong , rounded tubercles occur at or slightly ... elongated bullae low on the flank , no obvious tubercles ( but a thickened rib ) at the ventrolateral shoulder , and ...
Page 98
... elongated feeble tubercles on either side of a smooth siphonal area up to a whorl height of 15-17 mm , and are mostly long and simple . There is , however , a range of individuals of uniform to variable rib strength and direction ...
... elongated feeble tubercles on either side of a smooth siphonal area up to a whorl height of 15-17 mm , and are mostly long and simple . There is , however , a range of individuals of uniform to variable rib strength and direction ...
Page 114
... elongated tubercles are well developed , and some bear indications that they are in fact the bases of short spines . Tubercle strength varies from mere swellings to marked , sharp excrescences . As size increases , there is a tendency ...
... elongated tubercles are well developed , and some bear indications that they are in fact the bases of short spines . Tubercle strength varies from mere swellings to marked , sharp excrescences . As size increases , there is a tendency ...
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Common terms and phrases
Acrioceras Acrioceras sp Africa Aguirre Urreta 1981 ammonites Ammonoidea Ancyloceras Ancyloceratinae Aptian Aspinoceras aspinoceratid australis sp barremense BMNH body chamber Boreal and Tethyan bullae ceras cliff and gully close coiling coarsely ornamented Collignon 1962 compressed Crioceratites Crioceratites s.s. Cryptocrioceras cundimarcae d'Orbigny diameter dimorphism discussion early whorls emerici Emericiceras family Ancyloceratidae flexuous genus genus Crioceratites Geology Giovine group of Crioceratites Hauterivian Hemihoplites sp holotype Immel inner whorls Kakabadze 1981 Leveillé lobe locality 170 Lower Barremian major ribs material Menuthiocrioceras Mlambongwenya Trading Store monopujaae Neuquén Obata outer whorls Palaeontology Paracrioceras Paraspinoceras Patagonia Pedioceras phragmocone Pseudothurmannia Rawson referred ribs Riccardi & Aguirre Sarkar Sornayites South African Museum southern Patagonia Spath species groups specimens tabarelli Astier taxonomic Tethyan Realm text-fig Thieuloy Thomel trituberculate ribs tubercles type species umbilical shoulder umbilical wall uncoiled Unterkreide Upper Barremian Upper Hauterivian Valanginian venter ventral tubercles ventrolateral shoulder whorl section Wiedmann yrigoyeni Leanza zulu sp Zululand