The Andaman Sea adjoining the Indian Territory is biologically rich in terms of marine diversity. However, inadequate surveys during the post-independence era have resulted in large lacunae in data on the species composition in these waters. In this paper, we report the first observation of two species of dendrobranchiate prawns, Metapenaeopsis difficilis Crosnier, 1991 and Haliporus taprobanensis Alcock and Anderson, 1899, in the Indian seas, supplemented with notes on their morphological diagnoses, comparison with closely related species and zoogeographical distribution. Crustacean specimens were collected using trawl nets and a naturalists’ dredge on board the Fisheries Oceanography Research Vessel Sagar Sampada in the deeper offshore region between 124 and 850 m depth in the Andaman Sea during the period 2015–2017. Metapenaeopsis difficilis is distinguished by an oval-shaped thelycal plate and a low, unarmed bead-like plate on the thoracic sternum between the third pereiopods. Metapenaeopsis difficilis is previously reported from the Philippines, Indonesia, Coral Sea, New Caledonia, Marquesas Islands, and Wallis and Futuna Islands at depths between 21 and 440 m, thereby indicating its westward range extension. Haliporus taprobanensis is distinguished by a tough integument, presence of a postero-dorsal spine on the fourth pleonal somite, and smooth dorsum of the first four pleonal somites. Haliporus taprobanensis is previously reported from South Africa, Madagascar, off Sri Lanka, Indonesia, Philippines and northern Australia at depths between 300 and 1650 m.

毗邻印度领土的安达曼海在生物多样性方面具有丰富的生物。但是，独立后时代的调查不足，导致这些水域物种组成数据的空白很大。在本文中，我们报告了印度洋首次观察到两种树突支虾的物种，Metapenaeopsis difficilis Crosnier，1991年；Haliporus taprobanensis Alcock和Anderson，1899年，在印度洋上观察到，并补充了它们的形态学诊断，与近缘种和动物地理学的比较分配。在渔业海洋学研究船Sagar Sampada上使用拖网和博物学家收集甲壳动物标本2015-2017年期间，在安达曼海深水深124至850 m的较深海域。艰难梭菌的特征是在第三个脚足类之间的胸骨上有一个椭圆形的thelycal板和一个低而无臂的珠状板。菲律宾，印度尼西亚，珊瑚海，新喀里多尼亚，马克斯萨斯群岛，瓦利斯群岛和富图纳群岛的深度在21至440 m之间，据报道存在艰难梭菌。Haliporus taprobanensis的特征是坚韧的外皮，在第四个胸膜so节上存在后背脊柱，并且在前四个胸膜so节上具有平滑的背背。ro螺 先前曾报道过南非，马达加斯加，斯里兰卡，印度尼西亚，菲律宾和澳大利亚北部海域，深度在300至1650 m之间。