Undetermined undetermined

O’Gorman, José Patricio & Otero, Rodrigo A., 2023, Revision of the short-necked Cretaceous plesiosaurians from New Zealand, Comptes Rendus Palevol 22 (6), pp. 77-90 : 79-82

Elasmosauridae indet.

Cimoliasaurus australis – Lydekker 1889: 221.

Polycotylidae indet. Welles & Gregg 1971: 35.

MATERIAL. — NHMUK 36074 , two posterior cervical centra (juvenile) .

LOCALITY AND HORIZON. — NHMUK 36074 from Waipara River , South Island, New Zealand. Conway Formation, Maastrichtian ( Wilson et al. 2005; Fig. 1).

REMARKS

NHMUK 36074 was not personally checked, but Lydekker (1889) stated the following: “These specimens cannot be distinguished from the cervicals of the type of P. crassicostatus , figured by Owen in the ‘ Geol. Hag.’ dec. 1, vol. vii. pi. iii., and by Hector, op. cit. pi. xxviii” ( Appendix 1). The latter specimen is clearly referable to a juvenile elasmosaurid ( Welles & Gregg 1971: 36). Therefore, BM 36074 is here referred to Elasmosauridae indet.