Excorallana 1 6 1 



Stone and Heard, 1989, from the northeastern Gulf of Mexico. The latter 

 species, particularly, could conceivably be encountered in the Florida Keys. 

 Delaney (1984) provides a useful review of the genus Excorallana, and of the 

 distribution of the species. 



Key to species of Excorallana 



1 . Eyes contiguous 2 



Eyes well separated 4 



2. Apex of pleotelson with deep slit Jissicauda 



Apex of pleotelson entire 3 



3. Pleotelson with lateral incision oculata 



Pleotelson lacking lateral incision warmingii 



4. Pleotelson with lateral incision 6 



Pleotelson lacking lateral incision 5 



5. Frontal lamina linguiform, anteriorly rounded berbicensis 



Frontal lamina posteriorly with faintly concave margins, anteriorly 



subacute delaneyi 



6. Frontal lamina strongly grooved for entire length 7 



Frontal lamina with ventral surface flat 8 



7. Pleotelson with medial row of small tubercles flanked by row of larger 



tubercles in posterior half mexicana 



Pleotelson lacking rows of tubercles in posterior half antillensis 



8. Frontal lamina distinctly bell shaped; 6 cephalon with two pairs of 



tubercles and antennular bases not tuberculate quadricomis 



Frontal lamina, and S cephalon and antennules not as above 9 



9. Frontal lamina anteriorly broadly rounded, length 1.5 or less times 



basal width; S cephalon with two pairs of tubercles and basal 



antennular article each with tubercle sexticomis 



Frontal lamina anteriorly narrowly rounded, length about twice basal 

 width; 6 cephalon with three tubercles, tubercles lacking on 

 antennular bases tricomis tricomis 



