Joryma, Bowman & Tareen, 1983

Ravichandran, S., Vigneshwaran, P. & Rameshkumar, G., 2019, A taxonomic review of the fish parasitic isopod family Cymothoidae Leach, 1818 (Crustacea: Isopoda: Cymothooidea) of India, Zootaxa 4622 (1), pp. 1-99 : 29

Key to the Indian species of Joryma

1. Coxae 5–7 posteroventral margins with acute carina; pereopod 7 basis with acute carina..................................................................................................... Joryma engraulidis ( Barnard, 1936)

- Coxae 5–7 posteroventral margins without acute carina; pereopod 7 basis without acute carina........................ 2

2. Pleonite 1 not overlapped by pereonite 7, visible in dorsal view; antenna with 9 articles.............................. 3

- Pleonite 1 overlapped by pereonite 7, not visible in dorsal view; antenna with 8 articles.... Joryma brachysoma ( Pillai, 1964)

3. Cephalon conspicuous dorsally, reaching margin of pereonite 1 expansion; pleotelson posterior margin broadly rounded......................................................................... Joryma hilsae Rameshkumar et al. 2011

- Cephalon exposed dorsally, not reaching margin of pereonite 1 expansion; pleotelson posterior margin triangular......... 4

4. Mandibular palp not segmented; maxilliped with 7 recurved spines; Pereonite 1 anterolateral margin distinctly bilobed........................................................................ Joryma sawayah Bowman & Tareen, 1983

- Mandibular palp distinctly 3 segmented but segmentation incomplete; maxilliped with 4 recurved spines; Pereonite 1 anterolateral margin slightly bilobed............................................................................. 5

5. pleonites 1 and 2 overlapped laterally by pereonite 7, mandibular palp segmentation is incomplete in female........................................................................................... Joryma tartoor ( Pillai, 1954)

- pereonite 1 anterolateral expansion unilateral and not bilobed, pleonites 1 and 2 overlapped laterally by pereonite 7, mandibular palp not segmented in female............................................. Joryma malabaricus Aneesh et al. 2018