Several larval types are recognised, based on the presence or absence of posterolateral (PLT) and ventral tubules (VT) of the 10th and 11th body segments. The following classifications are based on Proulx et al.(2013), but now recognizes ten types.

The categories are:
                Lacking PLT and VT:
                    salinarius (Fig. 9)
                    A new variant of this type has been defined: yama, where the posterior prolegs are long and tanypodine-like, while the anal tubules
                    are arranged in a star-shape Martin & Chingambam (2016)

                Lacking PLT on segment 10:
                    halophilus - anterior VT very short or absent, posterior VT short (Fig. 8).
                    bathophilus - moderate to long, essentially straight VT.
                    fluviatilis - VT slightly curved and coming to a point at ends.
                    thummi - long, anterior VT with 'elbows', posterior VT coiled (Figs. 6 & 7).

                Possessing PLT on segment 10:
                    reductus - lacking ventral tubules.
                    semireductus - short straight or slightly curved VT.
                    melanotus - moderate to long, essentially straight VT.
                    plumosus - long, anterior VT with 'elbows', posterior VT coiled (Figs. 4 & 5).


From Andersen (1949)

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