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Image from page 405 of “Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum” (1898)
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Identifier: annalsofsouthaf731977sout
Title: Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum
Year: 1898 (1890s)
Authors: South African Museum
Subjects: Natural history
Publisher: Cape Town : The Museum
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library
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ited asHeteroceratinae, and from this it should be clear that authorship is referable toSpath (1922) and not to Hyatt (1900). Some of the most recent comprehensive publications on Heteroceratinae,especially the colchiditids, are by Kotetitchvili (1970) and Kakabadze (197la,19716). To the Heteroceratinae may be added Helicancyloceras gen. nov. (typespecies Heteroceras (Argvethites ?) vohimaranitraensis Collignon, 1962) from theUpper Aptian of Madagascar and possibly Kutatissites Kakabadze, 1970. Thesubfamily Heteroceratinae is otherwise represented in the Barremian of Zululandby Heteroceras sp. Colchidites gr. ex. colchicus spp., Colchidites sp. indet. andParaimerites sp. These species, and a detailed discussion on the Heteroceratinaeare given elsewhere (Klinger 1976). Helicancyloceras gen. nov.Type species Heteroceras (Argvethites?) vohimaranitraensis Collignon (1962, pi. 14,pi. 221 (fig. 962), from the Upper Aptian of Madagascar. 326 r-Jjjflp*5^ ANNALS OF THE SOUTH AFRICAN MUSEUM mm*
Text Appearing After Image:
#f^ Fig. 69. Tonohamites? caseyi sp. nov. SAS Z804 from locality 151, Zululand, Aptian IV,Photograph of cast of original, arrow indicates holotype. x 0,65. Diagnosis In typical forms, early whorls coiled in a shallow helix; later whorls may be coiled planispirally in same plane as helix. Size varies considerably, and early species may possibly be more loosely coiled. Ornament consists of ribbing with or without two to three rows of tubercles on each side. Tubercles, if present, become weaker or disappear at varying stages. Lateral, umbilical and internal lobe trifid. Saddles bifid. Age: Upper Aptian. CRETACEOUS FAUNAS FROM SOUTH AFRICA 327 Helicancyloceras (Helicancyloceras) subgen. no v.Diagnosis Ribbing interrupted over venter in early whorls and ribs may end in smalltubercles on either side of the siphonal line. Adult ornament consists of non-tuberculate ribs. Ribs may be flattened over venter with slight forward curvaturenearly touching each other, creating paternoster beaded effe
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