Linguimaera, Pirlot, 1936

Krapp-Schickel, T., 2003, Linguimaera Pirlot, 1936 (Crustacea, Amphipoda, Melitidae), a valid genus, Memoirs of Museum Victoria 60 (2), pp. 257-283 : 260-261

Key to species of Linguimaera

1. Telson distal robust setae longer than half telson length; gnathopod 2 male palm transverse................................. L. garitima (300 m depth, Australia)

— Telson distal robust setae equal or shorter than half telson length; gnathopod 2 male palm oblique............ 2

2. Uropod 3 ratio peduncle: rami greater or equal to 2.5. 3

— Uropod 3 ratio peduncle: rami less than 2.5........ 5

3. Longest distal robust seta on telson equal to half telson length; male gnathopod 2 palmar corner thumb-shaped..................... L. leo (shallow water, Australia)

— Longest distal robust seta on telson shorter than half telson length; male gnathopod 2 without thumb........... 4

4. Male gnathopod 2 palm J-shaped excavated, palmar corner sharp............. L. kellissa (infralittoral, Australia)

— Male gnathopod 2 palm oblique, neither excavated nor convex, without palmar corner...................................... L. pirloti (infralittoral, Indonesia)

5. Male gnathopod 2 palm with deep U-shaped excavation, dactylus strongly inwards bent................................ L. mannarensis (no depth reported, India)

— Male gnathopod 2 palm with excavation, not U-shaped 6

6. Male gnathopod 2 propodus palm with V-shaped incision near palmar corner; pereopods 5–7 very strong, posterodistal corner lengthened and broadened, pereopod 7 propodus widened.. L. bogombogo (littoral, Micronesia)

— Male gnathopod 2 propodus palm with shallow semicircular excavation; pereopods 5–7 slender......... 7

7. Male gnathopod 1 propodus more than twice as long as wide; pereopod 7 basis posterior margin straight, posterodistal corner with right angle......................... L. tias (infralittoral, Australia and New Zealand)

— Male gnathopod 1 propodus twice as long as wide; pereopod 7 basis posterior margin and posterodistal corner rounded......................................... L. caesaris (littoral, eastern Mediterranean, Red Sea)