SUPERFAMILY PENAEOIDEA
Postorbital spine on carapace present
Cervical groves long, usually extending at or close to dorsal midline
Eyestalk with tubercle on the inner margin
Endopods of 2nd pair of pleopodes in males without appendix masculina, appendix interna and lateral projections.
3rd & 4th pair of pleopods biramous
Penultimate thoracic segment - 2 well developed, arthrobranchs
Telson with fixed spines on the side of tip
Family : Solenoceridae
Rostrum with 1 or 2 dorsal tooth
Upper antennular flagella very long & filiform almost throughout the length
Postorbital spine on carapace absent
Cervical groves long, usually extending at or close to dorsal midline
Eyestalk with tubercle on the inner margin
Penultimate thoracic segment - 2 well developed, arthrobranchs
Endopodes of 2nd pair of pleopodes in males with appendix masculina, appendix interna, but lateral projection absent
3rd & 4th pair of pleopods biramous
Telson with movable spine on the side of tip
Family : Benthesicymidae
Rostrum with 3 or more dorsal tooth
Upper antennula flgella very short and flattened, almost throughout the length
Postorbital spine on carapace absent
Cervical groves long, usually extending at or close to dorsal midline
Eyestalk with tubercle on the inner margin
Penultimate thoracic segment - 2 well developed, arthrobranchs
3rd & 4th pair of pleopods biramous
Telson with movable spine on the side of tip
Family : Aristidae
Postorbital spine on carapace absent
Cervical grooves ending well below dorsal midline, but clearly distinct
Eyestalk without tubercle on the inner margin
Endopods of 2nd pair of pleopods in males with only appendix musculina
Penultimate thoracic segment - 1 well developed arthrobranchs
3rd & 4th pair of pleopods biramous
Telson without spines or with fixed spines or movable spines on the side of tip.
Postorbital spine on carapace absent
Cervical grooves ending well below dorsal midline, but clearly distinct
Eye stalk without tubercle on the inner margin, base with a styliform projection
Endopods of 2nd pair of pleopode with only appendix musculina
Penultimate thoracic segment - 1 well developed arthrobranchs
Pleopods 3rd & 4th pair are uniramous
Family : Sicyoniidae
