Alcirona 157 



coupling hooks; palp of five articles. Copulatory stylet in 6 articulating in 

 distal half of mesial margin of pleopod 2 endopod. Pleopods 3-5, exopods 

 biarticulate; endopods lacking marginal setae. Pleonite 5 lacking free lateral 

 margins, overlapped by pleonite 4. Uropodal sympod produced along mesial 

 margin of endopod. 



Xylolana radicicola Kensley, 1987a 

 Figure 72 



DIAGNOSIS 6 2.6 mm, 9 3.3 mm. Body about four times longer than great- 

 est width. Uropodal exopod about % width of endopod, bearing single short 

 subapical spine; both uropodal rami distally rounded. Pleotelson with lateral 

 margins subparallel, with poorly defined middorsal longitudinal ridge. 



RECORDS Twin Cays, Belize, in dead red mangrove roots, 1 m. 



Family Corallanidae Hansen, 1890 



DIAGNOSIS Outer ramus of maxilla 1 apex with single strong falcate spine, 

 with single strong spine with one or more smaller hooked spines at base, or 

 with two large recurved spines, occasionally with one to three smaller spines 

 between them. Maxillipedal endite reduced or lacking. 



Key to genera of Corallanidae 



1 . Maxilla 1 with single strong falcate spine 2 



Maxilla 1 with two large falcate spines Alcirona 



2. Maxilla 2, distal article slender-elongate; article 2 of maxillipedal palp 



longest Nalicora 



Maxilla 2 distally bluntly bilobed; article 3 of maxillipedal palp longest 

 Excorallana 



Alcirona Hansen, 1890 



DIAGNOSIS Antennular peduncle of two articles. Mandible lacking molar. 

 Maxilla 1 having two large recurved spines, with one or more smaller spines 

 between these. Maxilla 2 a simple rounded lobe. Maxilliped lacking endite. 

 Posterior half of body hirsute. 



