Table 4 in A new species of Tortanus (Atortus) (Copepoda, Calanoida, Tortanidae) from Minicoy Island, southeastern Arabian Sea

Table 4. Differential diagnosis of the female T. minicoyensis sp. nov. from all other species of the subgenus Atortus from the Indian Ocean.
SpeciesFifth pedigerous somiteCoupling deviceGenital compound somiteCaudal ramiT. minicoyensis sp. nov.Asymmetrical, left margin with a notch and right margin with a single downward directed triangular lobe (Figures 2A, 2C, 2D)Left process larger than right covering the Asymmetrical, right dorsolateral process of fifth margin with a bulge pedigerous somite and at midpoint with 2 lateral surface of genital ventrolateral spines compound somite (Figure 2D) (Figures 2C, 2D)Asymmetrical with 2 rounded medial processes, left ramus slightly larger than the right (Figures 2C, 2D)T. andamanensisThe right process produced more posteriorly than the left (Nishida et al., 2015, fig. 1A)Right process larger, covering the dorsolateral process of the fifth pediger and right lateral surface of genital compound somite (Nishida et al., 2015, figs. 1A, 1B)Right anterolateral margin slightly swollen (Nishida et al., 2015, fig. 1D)Symmetrical with left ramus slightly produced medially while the right ramus concave (Nishida et al., 2015, figs. 1A, 1D)T. magnonyxAsymmetrical, with right side more swollen. (Ohtsuka and Conway, 2005, fig. 2A)Not describedAsymmetrical, expanded anterolaterally, with a pointed process on the right ventrolateral side (Ohtsuka and Conway 2005, figs. 2A–2H)Asymmetrical, left ramus larger and wider than right, constricted at base (Ohtsuka and Conway, 2005, figs. 2A, 2C, 2D)T. insularisSymmetrical in dorsal view (Ohstuka and Conway, Not described 2003, figs. A, F)Asymmetrical, expanded anterolaterally on both sides with peg sensillum at tip (Ohstuka and Conway, 2003, figs. 2C–2E)Asymmetrical, left ramus larger than right (Ohstuka and Conway, 2003, figs. 2A, 2C, 2D)Nearly symmetrical, theAsymmetrical withT. tropicusright side being produced backwards in a wing-like processNot described (Sewell, 1932, fig. 131a)Asymmetrical, small bulge on the left side (Sewell, 1932, fig. 131a)distinctly stouter left ramus at its base than that of right (Sewell, 1932, fig.(Sewell, 1932, fig. 131a)131a)Asymmetrical, expandedanterolaterally on bothsides ending in smallAsymmetrical, left ramusT. recticaudaSymmetrical (Bowman, 1987, fig. 1A)Not describedpapilla with apical spinule; right expansion stronglyslightly wider and longer than right (Bowman,convex to straight laterally1987, figs. 1A, 1C)(Bowman, 1987, figs.1A–1C)