The Echinoid Directory

Kina Henderson, 1975, p. 28

Diagnostic Features	Test ovate with prominent anterior sulcus; slightly pointed to rear. Apical disc ethmolytic, with 4 gonopores. Genital plate 2 not projecting far behind ocular plates. Distinctly posterior of centre. Anterior ambulacrum deeply sunken; pore-pairs and tube-feet specialized and biserially arranged in each column. Other ambulacra petaloid and obviously sunken, anterior petals very much longer than posterior petals (about 4 times as long); petals cruciform and not particularly strongly flexed. Periproct marginal or ?inframarginal. Peristome anterior and facing into frontal groove; covered by labrum in life. Labral plate short and wide; in broad contact with sternal plates. Sternal plates large and fully tuberculate; adjacent ambulacral zones narrow. Aboral tuberculation fine, uniform and dense. Oral tubercles also dense and uniform. Well-developed peripetalous fasciole only.
Distribution	Upper Eocene to Upper Oligocene, New Zealand.
Name gender	feminine
Type	Kina gracilis Henderson, 1975, p. 28, by original designation.
Species Included	Only the type species.
Classification and/or Status	Spatangoida, Paleopneustina, Schizasteridae. Monotypic; subjective junior synonym of Diploporaster Mortensen, 1950.
Remarks	Differs from Diploporaster only by its lack of a latero-anal fasciole. As the presence or absence of fascioles is very variable in schizasterid spatangoids, it is probably best to treat this taxon as a synonym of Diploporaster. Henderson, R. A. 1975. Cenozoic spatangoid echinoids from New Zealand. Palaeontologial Bulletin, New Zealand Geological Survey 46, 1-127.