A rare species of bivalve clam Mactra aequisulcata G. B. Sowerby III (1894) reported for the first time from the Vengurla beach along the Sindhudurg coast of Maharashtra and nearby coastal stretches from the west coast of India. After comparing with the type illustration and malacological collections present in the National Zoological Collections of the Zoological Survey of India, it revealed that the species was found to be a new record to India which was although collected earlier and deposited, have been wrongly identified and not accorded a proper nomenclature. The presence of the prominent concentric growth line and the size of Mactra aequisulcata can be easily distinguished as the unique characters in the species, which make it differ from other closely related bivalves of the genus. A detailed description, illustration and geographical range extension of the species is presented in this paper. More authentication work from the historical collections may results in the addition to the molluscan inventory list of India.

一种稀有的双壳类蛤Mactra aequisulcata GB Sowerby III (1894) 在马哈拉施特拉邦 Sindhudurg 海岸的 Vengurla 海滩和印度西海岸附近的沿海地区首次报道。与印度动物学调查的国家动物收藏馆中的类型插图和动物学收藏品进行比较后，发现该物种是印度的新记录，虽然收集和存放较早，但已被错误识别，而不是给予适当的命名法。显着的同心生长线的存在和Mactra aequisulcata的大小可以很容易地区分为该物种的独特特征，这使得它不同于该属的其他密切相关的双壳类动物。本文提供了该物种的详细描述、插图和地理范围扩展。更多来自历史收藏的认证工作可能会导致印度软体动物清单的增加。