Ancinus belizensis 205 



anterior pocket 



oostegite 



posterior pocket 



internal pouch 



Figure 90. Diagrammatic representation of 9 sphaeromatid, showing marsupial 

 structures (adapted from Harrison, 1984). 



Ancinus H. Milne Edwards, 1840 



DIAGNOSIS Eyes dorsal. 9 mouthparts not metamorphosed. Mandibular 

 molar absent; palp of three ardcles. Maxilla 1 of single ramus, endite rudi- 

 mentary. Maxilla 2 of two rami. 9 with oostegites absent; brood held in two 

 opposing pockets, opening as narrow ventral slit between pereopods 4. Pleon 

 consisting of short anterior pleonite with free lateral margin, plus broadly 

 triangular pleotelson. Pleopod 1 uniramous, endopod absent. Pleopod 2 op- 

 erculiform. Pleopod 3, exopod of single article. Uropod lacking exopod, sym- 

 pod not laterally expanded. 



Key to species of Ancinus 



I. Pleotelson as long as basal width, apex narrowly rounded . . . brasiliensis 

 Pleotelson with basal width greater than length, apex subtruncate 



belizensis 



Ancinus belizensis Kensley and Schotte, 1987 

 Figure 91A-C 



DIAGNOSIS 6 4.1 mm, 9 2.8 mm. Body oval, about twice longer than wide. 

 Dorsal integument strongly pitted. Antennular flagellum of 12 articles; an- 



