Second and third instars tentatively identified as Liodessus noviaffinis Miller have six dorsolateral stemmata near the origin of each antenna. However, each stemma lacks a corneal (cuticular) lens on the surface exterior to its internal sensory pigmented components.
Barman, E. H.
"Variation in Stemmatal Morphology of Larvae of Liodessus noviaffinis Miller (Dytiscidae: Hydroporinae: Bidessini),"
Georgia Journal of Science, Vol. 67, No. 2, Article 7.
Available at: https://digitalcommons.gaacademy.org/gjs/vol67/iss2/7