First report of two ark shells, Anadara consociata (E. A. Smith, 1885) and A. troscheli (Dunker, 1882) (Arcidae: Anadarinae) from Indian waters with notes on morpho-taxonomy of some related species from east coast of India Author Tudu, Prasad Chandra Marine Aquarium and Regional Centre, Zoological Survey of India, Digha - 721428, West Bengal, India; tuduprasad. c @ zsi. gov. in Author Yennawar, Prasanna Freshwater Biology Regional Centre, Zoological Survey of India, Hyderabad - 500048, Telengana, India Author Mohapatra, Anil Marine Aquarium and Regional Centre, Zoological Survey of India, Digha - 721428, West Bengal, India; tuduprasad. c @ zsi. gov. in & Estuarine Biology Regional Centre, Zoological Survey of India, Gopalpur-on-Sea - 761002, Odisha, India text Records of the Zoological Survey of India 2019 119 1 journal volume 10.26515/rzsi/v119/i1/2019/141303 2581-8686 10913709 Genus Mosambicarca Lutaenko, 1994 Type species Mosambicarca mosambicana (Bianconi, 1850) (= Arca mosambicana )