Mesanthura bivittata 47 



Key to species of Mesanthura ( 9 only) 



1. Pigment in tiny evenly scattered chromatophores over body; cephalon 



with solid patch of pigment; mandibular palp article 3 with seven 



spines punctillata 



Pigment not evenly scattered over body 2 



2. Pereonites 4 and 5 with patch of pigment, sometimes with unpigmented 



area in middle of patch 3 



Pereonites 4 and 5 lacking fairly solid patch of pigment 6 



3. Pereonites 4 and 5 lacking unpigmented area in pigment patch; five 



transverse lines on pigment on pleon; mandibular palp article 3 with 



six spines paucidens 



Pereonites 4 and 5 with unpigmented area in pigment patch; pleon 

 lacking transverse pigment lines 4 



4. Pigment in obvious double longitudinal bands on pereon and pleon; 



mandibular palp article 3 with nine spines bivittata 



Pigment not in obvious double bands 5 



5. Unpigmented area in middle of pigment patch of pereonites 1-3; 



mandibular palp article 3 with 10 spines pulchra 



No unpigmented area in middle of pigment of pereonites 1-3; 



mandibular palp article 3 with eight spines looensis 



6. Pigment of pereon in fine reticulate lines; mandibular palp article 3 



with six spines reticulata 



Pigment of pereon not in fine reticulate lines; mandibular palp article 3 

 with four spines 7 



7. Pigment in more or less complete rings on pereonites 1-6 hopkinsi 



Pigment in strong transverse posterior bars on pereonites 4-7 . . fasciata 



Mesanthura bivittata Kensley, 1987a 

 Figures 18A, 20A-D 



DIAGNOSIS 6 5.2 mm, ovigerous 9 7.8 mm. Pigment in obvious double 

 longitudinal bands on pereon and pleon. Mandibular palp article 3 with nine 

 spines. Maxilliped lacking endite. Pereopod 1, propodal palm with rounded 

 lobe. 



RECORDS Twin Cays, Belize, under red mangroves, 1-2 m. 



