Glossobius

Martin, Melissa B., Bruce, Niel L. & Nowak, Barbara F., 2015, Review of the buccal-attaching fish parasite genus Glossobius Schioedte & Meinert, 1883 (Crustacea: Isopoda: Cymothoidae), Zootaxa 3973 (2), pp. 337-350 : 339

Key to the species of Glossobius

1. Body with scattered pigmentation; posterior margins of pereonites 3–5 with median point; posterior margin of pleotelson rounded.......................................................................... Glossobius parexocoetii

– Body without scattered pigmentation; posterior margins of pereonites 3–5 without median point; posterior margin of pleotelson not rounded...................................................................................... 2

2. Rostrum acute; pleopod 1 lateral margin weakly convex; uropod exopod longer than endopod....... Glossobius hemiramphi

– Rostrum rounded or blunt; pleopod 1 lateral margin strongly convex; uropod exopod similar or shorter than endopod...... 3

3. Labrum prominent, posterolateral margins produced; pleon as wide as or less wide than pereonite 7 width; coxae 2–7 anteroventral margins broader than posteroventral margins....................................... Glossobius anctus

– Labrum small, posterolateral margins narrowly rounded; pleon wider than pereonite 7 width; coxae 2–7 anteroventral margins similar size to posteroventral margins..................................................................... 4

4. Body subparallel; pereonites 1 and 2 with large bulbous lateral lobe; pereopod 3 dactylus larger and longer than other dactyli, two or more times longer than pereopod 3 propodus......................................... Glossobius impressus

– Body sub-rhomboid; pereonites 1 and 2 without bulbous lateral lobe; pereopod 3 dactylus no longer or no larger than other dactyli, less than twice or less as long as pereopod 3 propodus................................... Glossobius auritus