FIGURE 2. A–C in Deep-water Thyasiridae (Mollusca: Bivalvia) from the Oman Margin, Arabian Sea, new species and examples of endemism and cosmopolitanism

FIGURE 2. A–C, Thyasira anassa sp. nov. Holotype: A–B, external and internal of the left valve; C, gross anatomy viewed from the right side and right mantle removed; D–E, Channelaxinus investigatoris Smith, off Sri Lanka, National Museum of Wales, NMWZ 1955.158.11399; F–H, Thyasira acuticarinata Smith, reproduced from Annandale & Stewart, 1909. aa, anterior adductor muscle; au, auricle; aus auricular sinus; f, foot; id, inner demibranch; lbp, lateral body pouch; lun, lunule; me, mantle edge; od, outer demibranch; pa, posterior adductor muscle; ps, posterior sulcus; psn, posterior sinus; sms, submarginal sulcus; smsn, submarginal sinus.