6 - Sphaeromatidae::“Cute As Buttons”

132 FLABELLIFERA • C1ROLANIDAE
Calyptolana hancocki Bruce, 1985
Figure 57
DIAGNOSIS 9 3.0 mm. Body dorsally strongly convex. Cephalon with small
rostrum curving ventrally to meet frontal lamina; latter pentagonal. Eyes
small, well pigmented. Coxae of pereonites barely produced. Pleonite 5 lack­
ing free lateral margins. Pleotelson with broadly rounded posterior margin.
Uropodal sympod produced along mesial margin of endopod; exopod
slightly less than half length of endopod; latter distally rounded.
RECORDS Dominican Republic; Aruba Island, Netherlands Antilles, 43.2
m.
Cirolana Leach, 1818
DIAGNOSIS Frontal lamina usually twice as long as wide, not projecting;
clypeus flat. Mandible with strong incisor, dentate molar, palp of three arti­
cles. Pereopods all ambulatory. Pleon consisting of five free pleonites plus
pleotelson, pleonite 5 overlapped laterally by pleonite 4. All pleopodal rami
Key to species of Cirolana
1. Pleotelson posteriorly very broad to subtruncate 2
Pleotelson posteriorly narrowed 4
2. Uropodal endopod broad, distally rounded, lacking marginal spines
Uropodal endopod broad, distal margin having apical tooth or
obtruncata
angle 3
3. Posterior margin of pleotelson bearing spines; uropodal endopod not
dentate minuta
Posterior margin of pleotelson faintly crenulate, lacking spines;
uropodal endopod strongly dentate crenulitelson
4. Uropodal endopod evenly tapering to acute apex; uropodal exopod
length about four times greatest width albidoida
Uropodal endopod, outer margin convex; uropodal exopod length less
than four times greatest width parva