Microprosthema

Goy, Joseph W. & Martin, Joel W., 2013, Redescription of Microprosthema semilaeve (von Martens, 1872) (Decapoda: Stenopodidea: Spongicolidae) and description of a new species of Microprosthema from Dry Tortugas, Florida, Zootaxa 3630 (3), pp. 467-488 : 486

Key to the Western Atlantic species of Microprosthema

1. Propodus of 3rd pereiopod without distinct dorsal crista, carpus of 4t and 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.