. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 166 ANNALS OF THE SOUTH AFRICAN MUSEUM probably correct.' According to Riccardi & Westermann (1970), the position of the flank tubercles in Dobrodgeiceras is ventrolateral, and not lateral or periumbilical as described by Thieuloy & Gazay (1967: 77). The similarity with Valanginites led Riccardi & Westermann to place Dobrodgeiceras within the Polyptychitinae. However, since this subfamily is generally distinguished by the branching of the secondaries, a feature unknown in both Valanginite
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 166 ANNALS OF THE SOUTH AFRICAN MUSEUM probably correct.' According to Riccardi & Westermann (1970), the position of the flank tubercles in Dobrodgeiceras is ventrolateral, and not lateral or periumbilical as described by Thieuloy & Gazay (1967: 77). The similarity with Valanginites led Riccardi & Westermann to place Dobrodgeiceras within the Polyptychitinae. However, since this subfamily is generally distinguished by the branching of the secondaries, a feature unknown in both Valanginites and Dobrodgeiceras, there appears no reason why they should not preferably be included within the Olcostephaninae. Valanginites is a much misunderstood genus although the situation has recently been clarified somewhat by Thieuloy (1911a). Thus, a survey of the literature shows that at some time or other most strongly inflated, coarsely ribbed olcostephanids have been referred to this genus. Spath (1930) included O. perinflatus (Matheron) and O. stephanophorus (Matheron) in this genus, rectifying his mistake in 1939, but now including O. crassus (Zwierzycki) and, tentatively, Holcostephanus bachelardi Sayn into Valanginites. Imlay (1938) erected the species Valanginites angusticoronatus for a coarsely ribbed, inflated form which is herein considered to be an Olcostephanus, very close to O. rogersi (Kitchin) ($). The only undoubted species of Valanginites appear to be the type species V. nucleus (Romer), of which V. utriculus (Matheron) was considered a synonym by Roch (1930), V. dolioliformis (Roch) (Fig. 13), V. tijerensis Imlay, V. psaephoides (Mayer-Eymar) (including V. bachelardi (Sayn)), and V. simplus (d'Orbigny). Of these, umbilical tubercles are present in V. dolioli- formis and V. tijerensis. Leanza (1957) described four species of the Hauterivian genus Simbirskites from the Upper Valanginian of Argentina. Rawson (1971: 42), however, con- siders this material generica
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
