Shells and anatomy of granulose thyasirids of the genus Parathyasira. A–E an undescribed abyssal species from the Arabian Sea, NMW.Z. 2014, A–B external and internal views of the shell; C–D scanning electron micrographs of the granulose microsculpture; E gross anatomy. F Parathyasira resupina, holotype and type of the genus, New South Wales, AMS C57834; G–I Parathyasira subcircularis, Rockall Trough, NMW.Z.2013, G external of shell; H gross anatomy; I micrograph showing radial granulose sculpture.