A Small Collection of Brachyuran Crabs (Crustacea: Decapoda) from Lamongan Waters, East Java, Indonesia

The brachyuran crabs are one of the most diverse groups in the crustacean fauna, and their highest diversity has been confirmed to be occur at the Western Pacific Region, including Indonesia. Lamongan is located in East Java, Indonesia, and this regency has been acknowledged as the main source of the fisheries catch from East Java. However, information about the diversity of the marine crabs in this location is scarce, due to the main studies on crabs in this region were only focus on commercial crabs, such as Portunus pelagicus. Therefore, this study aims to provide preliminary data on the diversity of crabs in Lamongan waters, East Java, Indonesia. A short survey in September 2022, was conducted to observe and explore the crab biodiversity in this area. As a result, a total of six species of brachyuran crabs from four families (Eriphidae, Menippidae, Portunidae dan Vanuridae) were found in the intertidal and reef zone of this water, Eriphia ferox (Koh and Ng Raffles Bull Zool 56(2):327?355, 2008); E. sebana (Shaw and Nodder Naturalist?s Miscellany: 15, 589?612, 1803), Myomenippe hardwickii (Gray In: The Zoological Miscellany, 1831), Thalamita crenata (Rüppell Br?nner HL, 1830); T. danae (Stimpson Proc Acad Nat Sci Philadelphia 10:31?40, 1858) and Varuna litterata (Fabricius Proft et Storck, 1798). The result of this study may fill the gap about in information about the diversity of crabs in Lamongan water, East Java, Indonesia, as only 20 species of the marine crabs were previously recorded.