Dryopidae
Guides
Dryops
long-toed water beetles
Dryops is a genus of long-toed water beetles in the family Dryopidae, with at least 20 described species and a worldwide distribution. The genus is particularly diverse in the Palaearctic region, where 34 species have been recorded. Members of this genus are aquatic beetles associated with freshwater habitats. Species such as Dryops rufipes and Dryops renateae have been documented from Turkey and Tajikistan respectively.
Dryops arizonensis
Dryops arizonensis is a species of long-toed water beetle in the family Dryopidae. It is found in North America. As a member of Dryopidae, it belongs to a family of aquatic beetles commonly associated with freshwater habitats. The species was described by Schaeffer in 1905.
Helichus basalis
Long-toed water beetle
Helichus basalis is a species of long-toed water beetle in the family Dryopidae. It is distributed across North America, with records from Canada (New Brunswick, Nova Scotia, Québec) and the United States. As a member of Dryopidae, it is associated with aquatic or semi-aquatic habitats. The species was described by LeConte in 1852.
Helichus striatus
long-toed water beetle
Helichus striatus is a species of long-toed water beetle in the family Dryopidae. It inhabits cool, flowing water environments where it occurs on debris and beneath rocks. The species has a broad North American distribution spanning from eastern Canada to the Pacific coast. Two subspecies are recognized: Helichus striatus striatus and Helichus striatus foveatus.
Helichus suturalis
long-toed water beetle
Helichus suturalis is a species of long-toed water beetle in the family Dryopidae. It has been recorded from Central America and North America. Like other members of Dryopidae, it is associated with aquatic environments. The species was described by LeConte in 1852.
Helichus triangularis
Helichus triangularis is a species of long-toed water beetle in the family Dryopidae, described by Musgrave in 1935. The genus Helichus comprises aquatic beetles commonly associated with stream and river habitats. Records indicate presence in North America and Middle America, though specific details about this species' biology remain sparse.
Pelonomus
long-toed water beetles
Pelonomus is a genus of long-toed water beetles in the family Dryopidae, first described by Erichson in 1847. The genus contains approximately five described species distributed primarily in the Americas. These beetles are associated with aquatic or semi-aquatic habitats. Members of this genus are characterized by elongated tarsi adapted for clinging to submerged substrates.
Postelichus
long-toed water beetles
Postelichus is a genus of long-toed water beetles in the family Dryopidae, established by Nelson in 1989. The genus contains seven described species distributed in North America, with the earliest described species dating to 1852. Members of this genus are associated with aquatic or semi-aquatic habitats, consistent with the family Dryopidae's ecological preferences.
Postelichus immsi
Postelichus immsi is a species of long-toed water beetle described by Hinton in 1937. It belongs to the family Dryopidae, a group of aquatic beetles commonly found in flowing water habitats. The species is known from North America. Very few observations exist in citizen science databases, suggesting it is either rare, poorly sampled, or cryptic in its habits.
Stygoparnus
Comal Springs dryopid beetle (for sole species S. comalensis)
Stygoparnus is a monotypic genus of dryopid beetles containing the single species Stygoparnus comalensis, known as the Comal Springs dryopid beetle. The genus is endemic to central Texas spring systems fed by the Edwards Aquifer. Its sole member is a federally endangered, subterranean-obligate aquatic beetle with vestigial eyes and reduced pigmentation. The genus represents the only known aquatic lineage within the family Dryopidae.