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Records of the Australian Museum (2017) Vol. 69 
Figure 18. Janthina fossil localities in southern Australia. Symbols: A Janthina chavani: • Janthina typica. (A) 
general map of southern Australia; (B) localities in southeastern South Australia and western Victoria. Localities: 
(1) “lower” Ascot Fm in wells, Perth Basin (J. chavani ); (2) Roe Calcarenite, Roe Plain (J. chavani, type locality of 
Hartungia dennanti chavani ); (3) Point Ellen Fm, Vivonne (3a) (J. chavani ) and unnamed limestone, Table Rock 
(3b) (J. typica ), south coast of Kangaroo Island; (4) Point Ellen Fm, Cape Jervis, Fleurieu Peninsula (J. chavani)', (5) 
Hallett Cove Sandstone, Hallett Cove, Adelaide (J. typica and J. chavani ); (6) Bridgewater Limestone, Naracoorte (J. 
chavani)', (7) Grange Bum Fm, Grange Bum and Muddy Creek, near Hamilton (J. typica, type locality of Heligmope 
dennanti ); (8) Jemmys Point Fm, Bunga Creek, E Gippsland (J. typica). 
sequence stratigraphy (e.g., Abbott & Carter, 1994, 1999; 
Kamp & McIntyre, 1998; Abbott et al., 2005) have allowed 
precise correlation with the international Plio-Pleistocene 
succession (Naish etal., 1998; Carter & Naish, 1998,1999; 
Cooper, 2004; Raine etal., 2015). This provides a precisely 
dated record of the time range of Janthina chavani in New 
Zealand. The basinal succession from the Mangapanian 
Stage upwards was summarized by Naish et al. (1998: figs 
2, 4) and a highly simplified version is shown here (Fig. 
17). The entire succession consists of a 5 km-thick pile of 
Zanclean-Ionian (Opoitian-Haweran) marine rocks. 
Other Mangapanian (late Piacenzian-earliest Gelasian) 
records of Janthina chavani in New Zealand are sparse, and 
consist mostly of single specimens. A few fragments were 
collected at one locality along Cricklewood Road in northern 
Hawke’s Bay. A few poor specimens were collected from 
brown-weathered sandstone between conglomerate beds 
on Pohokura and Matahorua Roads, west of Lake Tutira, 
Hawke’s Bay. Material in the Department of Geology, 
University of Otago reported by Carter (1972) from the 
Komako area, Pohangina Valley, easternmost Whanganui 
Basin, includes a specimen from latest Mangapanian rocks 
and three from the immediately overlying basal Nukumaruan 
beds, laterally equivalent to Hautawa Shellbed in the 
Rangitikei and Turakina River successions. 
The Nukumaruan (late Gelasian-early Calabrian) 
youngest records of Janthina chavani in New Zealand are 
also mostly of single specimens. One robust specimen was 
