Figs. 1–4 in Figs. 16–17. 16 in A Description of the First Instar of Hoperius planatus Fall, 1927 (Coleoptera: Dytiscidae: Colymbetinae: Colymbetini), with Phylogenetic Implications

Figs. 1–4. Distribution of primary setae and pores on the maxilla of selected groups of Dytiscidae. 1–2) maxilla of Laccophilus hyalinus (Laccophilinae), dorsal and ventral aspects respectively, showing the distribution of primary setae and pores outside the Hydroporinae; 3–4) maxilla of a generalized Hydroporinae larva, dorsal and ventral aspects respectively, showing the ground plan pattern of primary setae and pores proposed in this study (compared with Alarie 1991). Numbers and lower case letters refer to primary setae and pores respectively.