226 FLABELLIFERA • SPHAEROMATIDAE 



Paradella tumidicauda (Glynn, 1970) 

 Figure 98H,I 



DIAGNOSIS 6 6.7 mm, 9 6.5 mm. 6: Last pleonite with two submedian 

 swellings. Pleotelson with four submedian broadly rounded swellinglike tu- 

 bercles and two pairs of lateral tubercles. Foramen wider than long, posterior 

 contiguous borders of foramen each bearing rounded swelling. 9: Pleotelson 

 with four submedian swellinglike tubercles, sometimes with two obscure lat- 

 eral tubercles; posterior slit not visible dorsally, area surrounding slit 

 swollen, horseshoe shaped. 



RECORDS Margarita Island, Venezuela, from among intertidal barnacles. 



Subfamily Sphaeromatinae H. Milne Edwards, 1840 



DIAGNOSIS Cephalon not fused with pereonite 1. Pereopods 1 and 2 am- 

 bulatory. Pleopods 4 and 5, endopods having branchial pleats, exopods un- 

 pleated, membranous, of two articles. Uropods biramous. 



Key to genera of Sphaeromatinae 



1 . Uropodal exopod with outer margin serrate Sphaeroma 



Uropodal exopod with outer margin entire or faintly crenulate 2 



2. S, pleotelsonic notch with median lobe; 9, pleotelsonic apex barely 



notched with rounded median lobe; 9 , mouthparts metamorphosed 



3 



Pleotelson entire to very faintly notched in S and 9 ; 9 , mouthparts 

 not metamorphosed; with three pairs of oostegites Exosphaeroma 



3. Mature S, uropodal exopod about twice length of endopod; 9 with 



three pairs of oostegites Harrieta 



(5, uropodal rami subequal or exopod shorter than endopod; 9 with 

 four pairs of oostegites Cymodoce 



Cymodoce Leach, 1814 



DIAGNOSIS Pleon with two elongate straight parallel incomplete sutures on 

 each side. Pleotelsonic apex with marked notch bearing median tooth. 



