Scirtidae

Fleming, 1821

Marsh Beetles

Genus Guides

Contacyphon(marsh beetles)
Elodes(marsh beetles)
Exneria
Herthania
Microcara
Nyholmia(marsh beetles)
Ora(flea marsh beetles)
Prionocyphon(marsh beetles)
Sacodes(marsh beetles)

is a of small beetles commonly known as . Larvae are typically associated with stagnant water but can also occur in flowing water, while are found near water's edge in decomposing plant material. The family comprises more than 600 described distributed among approximately 30-60 worldwide. Members are primarily aquatic or semi-aquatic in their larval stages, with adults showing strong affinity for moist riparian .

Sacodes pulchella by (c) Will Linnard, some rights reserved (CC BY), uploaded by Will Linnard. Used under a CC-BY license.

Sacodes by (c) Victor Engel, some rights reserved (CC BY), uploaded by Victor Engel. Used under a CC-BY license.

Pronunciation

How to pronounce Scirtidae: //ˈskɜːrtɪˌdeɪ//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

are small, typically 2-6 mm in length, with compact, somewhat rounded bodies. often have clubbed and may show coloration ranging from brown to black, sometimes with patterned . Larvae are elongate, somewhat cylindrical, and adapted for aquatic or semi-aquatic life.

Images

Habitat

Larvae inhabit stagnant or slow-moving water, including streams, ponds, marshes, and wetlands; some occur in flowing water. are found in moist terrestrial environments near water, particularly in decomposing plant material, leaf litter, and vegetation at the water's edge.

Distribution

Worldwide distribution with records from North America, Europe, Asia, South America, and the Caribbean. Documented from Russia (European part), Hong Kong, Kopet Dagh Mountains, Chile, southern Florida, the Bahamas, and the Cayman Islands.

Ecological Role

Larvae function as secondary producers in aquatic , contributing to detritus processing in streams and wetlands. In tropical forest streams, Hydrocyphon show secondary production comparable to other aquatic beetles, with production: ratios of 11-12. Larval densities can average 70+ individuals per square meter in favorable microhabitats.

Similar Taxa

PsephenidaeBoth contain aquatic larvae found in similar stream ; however, psephenid larvae have distinctive fan-shaped gills and flattened, disc-like body forms not seen in .
ElmidaeRiffle beetles share aquatic larval but have more cylindrical, heavily sclerotized larvae and that are typically more elongate with thread-like rather than the clubbed antennae common in .