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22 long-toed water beetles species
Helichus lithophilus
Dryops viennensis
Helichus striatus
Helichus suturalis
Postelichus musgravei
Helichus fastigiatus
Pelonomus obscurus
Dryops anglicanus
Dryops luridus
Postelichus confluentus
Helichus triangularis
Helichus basalis
Postelichus immsi
Helichus columbianus
Helichus confluentus
Stygoparnus comalensis
Dryops ernesti
Dryops arizonensis
Dryops auriculatus
Dryops similaris
Dryops griseus
Postelichus productus
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