Redescription of Microprosthema semilaeve (von Martens, 1872) (Decapoda: Stenopodidea: Spongicolidae) and description of a new species of Microprosthema from Dry Tortugas, Florida Goy, Joseph W. Martin, Joel W. Zootaxa 2013 3630 3 467 488 87HHR [632,832,736,762] Malacostraca Spongicolidae Microprosthema Animalia Decapoda 19 486 Arthropoda genus    1. Propodus of 3rd pereiopod without distinct dorsal crista, carpus of 4tand 5th pereiopods without ventral movable spines..... 2  - Propodus of third pereiopod with distinct dorsal crista, carpus of 4th and 5th pereiopods with 2–7 ventral movable spines.... 3   2. Rostrum with 2 dorsal, 0 ventral teeth, lateral carina; mandibular palp 2-segmented.........................  M. looensis  - Rostrum with 5 dorsal, 1 ventral teeth, no lateral carina; mandibular palp 3- segmented....................  M. inornatum   3. Carapace densely covered with numerous small spines, 2nd pereiopod with 1–10 dorsal meral spines.................... 4  - Carapace covered with few small or large spines, 2nd pereiopod with glabrous merus................................. 5   4. Dorsal surface of longitudinal carina of uropodal endopodite with strong spine; segments of mandibular palp glabrous................................................................................................  M. semilaeve  - Dorsal surface of longitudinal carina of uropodal endopodite glabrous; middle segment of mandibular palp with 3 strong exter- nal spines...................................................................................  M. manningi   5. Dactyli of 4th and 5th pereiopods biunguiculate, end of longitudinal carina of uropodal endopodite rounded....  M. granatense  - Dactyli of 4th and 5th pereiopods triunguiculate, longitudinal carina of uropodal endopodite ending in a strong spine...........................................................................................  M. tortugasensis  n. sp.