Water Scavenger Beetle
( Hydrophilidae )


2012-1023-38CP1309-COL00583-Hydrophilidae[1330h00s,L,A,laterum]{EStrand}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Hydrophilidae
(Latreille ,1802 )
Common Name:Water Scavenger Beetle
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Insecta
Superorder:Holometabola
Order:Coleoptera
Suborder:Polyphaga
Family:Hydrophilidae
Taxon Code:COL00583
ITIS/TSN:112811

LOCATION DETAILS
Location Name
Golden Gate Park, Golden Gate Park, San Francisco
County:San Francisco County
ECI Site#:CA38CP0000

RECOGNITION
Description
Very common underwater beetles that are typically dark, convex and ovular in dorsal view. Aquatic forms may superficially resemble Dysticidae but can be easily distinguished by having antennae. Many have keeled sterna. The adults come up for air head first, and move hind legs alternately (Dysticidae come up for air tail first and move hind legs together, like oars).
Body Length
1-40 mm, with exotic species up to 50 mm.
Diversity
About 260 species in 35 genera in America north of Mexico, with about 3,400 species in about 200 genera worldwide.
Similar Taxa
Predaceous Diving Beetles (Dytiscidae)

BIOLOGY
Food
Some adults are scavengers and feed on dead plant and animal material, others are predatory. Larvae often predatory. Some terrestrial species feed on various decaying matter and associated maggots.
Habitat
Mostly aquatic; Sphaeridiinae are terrestrial (in dung, compost, carrion, and other decaying organic matter).
Distribution
Worldwide.
Diversity
About 260 species in 35 genera in America north of Mexico, with about 3,400 species in about 200 genera worldwide.

CREDITS
Photographer
Erica Strand

References
Family Hydrophilidae - Water Scavenger Beetles. (bugguide.net/node/view/9594). Accessed May 31, 2016. .
ITIS.


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