. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 110. Jeanthieuloyites quinquestriatus (Besairie). The holotype in the collections of the University of Paris, from the Upper Valanginian of Ambiky, Malagasy Republic, x 1. prorsiradiate secondaries, commonly with an intercalated rib between bundles. There are 45 ribs across the venter of the outer whorl. This species diners from the present material in lacking parabolae, and in having fewer primary and secondary ribs. 'Taraisites' carillense Cantu Chapa (Fig. 112) and 'Rogersites' paucicostatus
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 110. Jeanthieuloyites quinquestriatus (Besairie). The holotype in the collections of the University of Paris, from the Upper Valanginian of Ambiky, Malagasy Republic, x 1. prorsiradiate secondaries, commonly with an intercalated rib between bundles. There are 45 ribs across the venter of the outer whorl. This species diners from the present material in lacking parabolae, and in having fewer primary and secondary ribs. 'Taraisites' carillense Cantu Chapa (Fig. 112) and 'Rogersites' paucicostatus Imlay (Fig. 113) merely seem to be based upon different growth stages of Bose's (1923) species. Occurrence Olcostephanus durangensis is known with certainty only from Mexico, though it may also be present in South Fig. 111. Olcostephanus {Olcostephanus) bangei (Bose). The holotype, by monotypy, from the Taraises Formation of northern Mexico (after Bose 1923). x Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
