Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29


Previous events
TaxonomyBrowseInfoImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Staphyliniformia » Hydrophiloidea » Water Scavenger Beetles (Hydrophilidae) » Hydrophilinae » Hydrophilini » Tropisternus » Tropisternus collaris
Photo#269121
Water Scavenger Beetle - Tropisternus collaris
Copyright © 2009 Catfish

Water Scavenger Beetle - Tropisternus collaris
Lewes, Sussex County, Delaware, USA
April 25, 2009
Size: 10 mm
Not so sure about the genus of this big boy.

Images of this individual: tag all
Water Scavenger Beetle - Tropisternus collaris Water Scavenger Beetle - Tropisternus collaris Water Scavenger Beetle - Tropisternus collaris Water Scavenger Beetle - Tropisternus collaris Water Scavenger Beetle - Tropisternus collaris Water Scavenger Beetle - Tropisternus collaris Water Scavenger Beetle - Tropisternus collaris
tag · login or register to post comments
Contributed by Catfish on 25 April, 2009 - 10:38pm
Last updated 26 April, 2009 - 8:30pm

Moved
Moved from Tropisternus.
… Catfish, 26 April, 2009 - 8:30pm login or register to post comments

Not diving beetle.
This is a water scavenger beetle, family Hydrophilidae, maybe genus Tropisternus. Your ventral shot clearly shows the "keel" spine running down the middle of the underside, a hallmark of hydrophilids. The long "antennae" are actually one set of palps. The antennae are very short, clubbed, and used to obtain air at the water's surface. Awesome shots!
… Eric R. Eaton, 25 April, 2009 - 11:12pm login or register to post comments

 
Thank you -- Thanks, Eric.
Thank you --

Thanks, Eric. (I should have checked the Guide for Hydrophilidae. When will I ever learn....) Looking at the Guide, this looks a lot like T. collaris. -- Cat
… Catfish, 26 April, 2009 - 5:18am login or register to post comments

 
confirm T. collaris
the elytra markings say T. collaris - the only one like it around here. see
… Tim Moyer, 26 April, 2009 - 8:11pm login or register to post comments

 
Thanks, Tim. -- C
Thanks, Tim. -- C
… Catfish, 26 April, 2009 - 8:29pm login or register to post comments

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact