Decapoda, Palaemonidae) 1) By
NEW DISTRIBUTION' RECORDS FOR SPECIES OF MACROBRACHIUM WITH NOTES ON THE DISTRIBUTION OF THE GENUS IN FLORIDA (DECAPODA, PALAEMONIDAE) 1) BY LIPKE B. HOLTHUIS Rijksmuseum van Natuurlijke Historie, Leiden, Netherlands AND ANTHONY J. PROVENZANO, JR. Rosenstiel School of Marine and Atmospheric Sciences,University of Miami, Florida, U.S.A. The palaemonid shrimp genus ?Ylacrobrachium was known to be represented in Florida waters by four species: M, acanthuriis (Wiegmann, 1836) (Schmitt, 1933: 313, 314, St. Augustine, Miami River, Coconut Grove; Hedgpeth, 1949: 31, fig. 5, St. Augustine, Coconut Grove; Holthuis, 1952: 50, St. Augustine, Daytona Beach, Sebastian, Fort Pierce, Boca Raton, Miami), At. ohione (Smith, 1879) (Holthuis, 1952: 69, St. John's River), At. olfe;-sil (Wiegmann, 1836) (Schmitt, 1933: 315, St. Augustine; Hedgpeth, 1949: 35, fig. 5, St. Augustine; Holthuis, 1952: 100, St. Augustine, Silver Glen Springs) and M. carcinus (L., 1758) (Schmitt, 1933: 313, 314, 316, St. Augustine, Silver Springs and Miami River; Hedgpeth, 1949: 32, fig. 5, St. Augustine, Miami, and Big Pine Key; Holthuis, 1952: 123, St. Augustine, Silver Glen Springs, Miami River, Big Pine Key). All of these, with the exception of M. olfersii, have a wide range in the southern U.S.A. Outside its range in South and Central America, M. olfersii so far was only known from north Florida. Recent collecting in south Florida waterways has revealed the presence of two additional species, neither of which had been reported from the U.S.A. before. The purpose of this note is to record the occurrence of these two species and to extend southward the known range of M.
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