Two new species of the echinoid genus Monostychia from the Miocene of Victoria and a redescription of M. etheridgei Tenison-Woods, 1877

Abstract

Sadler, T., Holmes, F.C., & Gallagher, S.J., 8 January 2019. Two new species of the echinoid genus Monostychia from the Miocene of Victoria and a redescription of M. etheridgei Tenison-Woods, 1877. Alcheringa 43, 279–290. ISSN 0311-5518. Two new species of the clypeasteroid Monostychia Laube, 1869, are described; M. merrimanensis sp. nov. from the East Gippsland region of Victoria and M. glenelgensis sp. nov. from the Gambier Embayment of southwestern Victoria. M. etheridgei Tenison-Woods, 1877, from northern Tasmania, which closely resembles M. merrimanensis sp. nov., is redescribed. A comparison is also made between M. elongata Duncan, 1877, and M. glenelgensis, as both are present in the ..