New records of the Indo-Pacific seastar Mithrodia clavigera (Lamarck, 1816) include the north-central Gulf of Mexico, southeastern Florida, and Ascension Island. Material includes in-situ photographs, specimens from our own field collections, and museum specimens. This species was previously reported in the Atlantic basin in the 1880s off Brazil and in the western Caribbean Sea in the late 1960s and early 1970s. More recent findings are attributable to the advent of SCUBA, seafloor photography, and genetic analysis. The presence of M. clavigera in the Atlantic Ocean and adjacent waters probably represents a former connection with populations in the eastern Pacific Ocean before the rise of the Isthmus of Panama. Our observations here of specimens collected off Palm Beach and Fort Lauderdale, Florida, and the Gulf of Mexico add to our understanding of this species' behavior and ecology.

印度洋太平洋海星密思罗维（Mithrodia clavigera）（拉马克，1816年）的新记录包括墨西哥湾中北部，佛罗里达州东南部和扬升岛。资料包括现场照片，我们自己的野外收藏的标本和博物馆标本。该物种以前在巴西1880年代的大西洋海盆和1960年代末和1970年代初在加勒比海西部报道过。最近的发现归因于SCUBA，海底摄影和遗传分析的出现。克氏杆菌的存在在大西洋地峡兴起之前，大西洋和邻近水域中的大西洋可能代表了与东部太平洋人口的先前联系。我们在这里对从棕榈滩和佛罗里达州劳德代尔堡以及墨西哥湾采集的标本的观察，加深了我们对该物种的行为和生态的了解。