Species: mangahouangae WIFFEN, 1980
Etymology:

Holotype: "S34-S77"

Locality: N104/1909, stream boundary from bed of Mangohouanga stream, Tributary of Hoe River, midway between bridge and waterfront Grid Reference NZMS 1, sheet N104/Mahnataniwah first edition 261088, North Island, New Zealand.

Horizon: Mangahouanga Stream Site.

Biostratigraphy:

Age: Piripauan-Haumuria, Uppermost Campanian-Lowermost Maastrichtian Stage, Upper Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material: Fragmentary skull, fragmentary dentary, teeth, cervical, dorsal, caudal vertebrae, left humerus, ulna carpal bones, metacarpal bones, and phalanx.

Referred material:

WIFFEN, 1990

Locality: V19/f67, Grid ref. 432475, Mangahouanga Stream, boulder 2 km upstream from forestry road bridge and 100 m below junction of third side creek entering from the northeast, North Island, New Zealand.

Horizon:

Biostratigraphy:

Age: Piripauan-Haumuria, Uppermost Campanian-Lowermost Maastrichtian Stage, Upper Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material:

NZGS, CD532: Anterior part of right mandible with 4 teeth, 1 dorsal and 1 caudal vertebrae, plus fragment, and 1 small rib of a juvenile.

 

= Prognathodon cf. overtoni WIFFEN 1990

Locality: V19/f69. Grid ref. 440483, Mangahouanga Stream, 1.5 km upstream of third side creek entering from the northeast, and 3.6 km upstream from forestry road bridge, North Island, New Zealand.

Horizon: Maungataniwha Sandstone.

Biostratigraphy:

Age: Piripauan-Haumuria, Uppermost Campanian-Lowermost Maastrichtian Stage, Upper Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material:

NZGS, CD535: Nearly complete skull and dentary.

 

= Mosasaurus flemingi WIFFEN, 1990
Etymology:

Holotype: NZGS, CD350

Locality: V19/f70, Grid ref. 446490, Mangahouanga Stream, boulder 1.5 km upstream of third side creek entering from the northwest and 3.6 km upstream from forestry bridge, North Island, New Zealand.

Horizon: Maungataniwha Sandstone.

Biostratigraphy:

Age: Piripauan-Haumuria, Uppermost Campanian-Lowermost Maastrichtian Stage, Upper Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material: Basioccipitual unit-posterolateral ramus of parietals, squamosals, paraoccipital process, with disarticulated occipital condyle and Incomplete basisphenoid, complete left quadrate, 4 articulated anterior cervical vertebrae, complete with hypapophyseal peduncles and 3 hypapophyses, 1 rib and 1 isolated tooth.

 

= Rikisaurus tehoensis WIFFEN, 1990
Etymology:

Holotype: NZBS, CD531

Locality: V19/f68, Grid ref. 437482, Mangahouanga Stream site, 1.2 km upstream of third side creek entering from the northeast, 3.3 km upstream from forestry road bridge, North Island, New Zealand. Horizon:

Horizon: Maungataniwha Sandstone.

Biostratigraphy:

Age: Piripauan-Haumuria, Uppermost Campanian-Lowermost Maastrichtian Stage, Upper Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material: Skull, dentary and 4 cervical vertebrae.

Dorsal view of skull after WIFFEN, 1990.