. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 128. Baculites ambatryensis Collignon, 1971. Plaster cast of the holotype, GD12392, the original of Collignon (1971, pi. 645 (fig. 2392)) from the Lower Maastrichtian of gisement 4(X), Cote d'Ambatry (Betioky), Madagascar. All x 1, Discussion The elliptical whorl section and relatively simple suture show that this baculitid belongs to the group of B. vanhoepeni. However, the total absence of lateral ornament in more than a hundred specimens clearly shows that this is indeed a consistently smooth
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 128. Baculites ambatryensis Collignon, 1971. Plaster cast of the holotype, GD12392, the original of Collignon (1971, pi. 645 (fig. 2392)) from the Lower Maastrichtian of gisement 4(X), Cote d'Ambatry (Betioky), Madagascar. All x 1, Discussion The elliptical whorl section and relatively simple suture show that this baculitid belongs to the group of B. vanhoepeni. However, the total absence of lateral ornament in more than a hundred specimens clearly shows that this is indeed a consistently smooth baculitid species and not merely a smooth variant of B. vanhoepeni. As discussed above, identifying or separating smooth Baculites species is very difficult unless the whorl section and sutures are very distinctive, or if the exact age is known. The closest match we could find both in morphology and age is B. duharti first described from Tierra del Fuego by Hiinicken (in Hiinicken et al. 1975: 116, pi. 1 (figs 1-4), pi. 2 (figs 1-2), pi. 3 (figs 5-8), text-figs 2a-d, 3a-c), 4-5) and imprecisely dated as Campanian-Maastrichtian. Later, Hiinicken et al. (1980: 224, pi. 1 (figs la-b, 2), pi. 2 (figs la-c, 2, 3a-b, 4-5, 6a-b), Fig. 129 (see facing page). Baculites asperoanceps Lasswitz, 1904. Plaster cast of the lectotype, nr 3045 s (k), MGUWr, from Austin, Texas, in the collections of the Henryk Teisseyre Geological Museum of the Institute of Geological Sciences of the University of Wroclaw, 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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