6 - Sphaeromatidae::“Cute As Buttons”

Gnathia puertoricensis Menzies and Glynn, 1968
Figure 103E-G
Gnathia triospathiona 241
DIAGNOSIS 6 3.0 mm, ovigerous $ 1.8 mm. Anterior margin of cephalon
having three tubercles between mandibular bases, medial tubercle narrower
than submedian pair. Dorsal integument finely granular, with coarser gran­
ules mediodorsal to eye. Pereonites 4 and 5 indistinctly separated. Mandible
lacking proximomedial lobe.
RECORDS Carrie Bow Cay, Belize, intertidal to 2 m; Puerto Rico, intertidal;
Cuba.
Gnathia rathi Kensley, 1984
Figure 104 A
DIAGNOSIS 6 1.9 mm, ovigerous 9 2.2 mm. Frontal margin faintly convex
to straight between single low lateral tubercle mesial to mandibular bases.
Dorsal integument of cephalon and anterior two free pereonites coarsely
granular. Lateral margins of telson faintly denticulate. Pereonites 4 and 5
poorly separated.
RECORDS Carrie Bow Cay, Belize, 1-36 m.
Gnathia samariensis Miiller, 1988
Figure 104B
DIAGNOSIS 6 2.0 mm. Anterior margin of cephalon with three tubercles,
median tubercle slightly shorter than submedian pair; dorsal integument
smooth. Pereonites 4 and 5 well differentiated; pereonite 5 about 2.2 times
wider than middorsal length. Mandible lacking proximomedial lobe.
RECORDS Colombia.
Gnathia triospathiona Boone, 1918
Figure 104C
DIAGNOSIS 6 8.8 mm. Anterior margin of cephalon with broad-based tri­
angular projection bearing three low teeth; deep V-shaped depression pos­
terior to anterior margin, with low flanking granulations.
RECORDS Off Key West, in Gulf Stream, 218 m.