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For Insects, Spiders & Their Kin
For the United States & Canada
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Fall Fund Drive


affinis complex

Tiny Diver - Liodessus Liodessus sp. - Liodessus - male Liodessus - male Dytiscid? - Liodessus mini Diver - Liodessus Liodessus affinis complex - Liodessus Diver #25 - Liodessus Diver #25 - Liodessus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Dytiscidae (Predaceous Diving Beetles)
Subfamily Hydroporinae
Tribe Bidessini
Genus Liodessus
No Taxon affinis complex
4 Nearctic spp.: L. affinis, L. noviaffinis, L. obscurellus, and L. saratogae
yellow elytra marked with brown longitudinal vittae/stripes (1)
spp. can be usually distinguished only by genitalia
L. affinis: Northeastern N. Amer. (IL-VA-NF-MN) (1)
L. noviaffinis: Primarily coastal records: TX-FL-NS (1)
L. obscurellus: Widely dist. across w. N. Amer: CA-LA-NWT-AK / Mex. (1)
L. saratogae: Known only from Death Valley, CA (1)
This page serves as a holding area for images that cannot be further identified based on habitus and location
Print References
Miller, K.B. 1998. Revision of the Nearctic Liodessus affinis (Say 1823) species group (Coleoptera: Dytiscidae, Hydroporinae, Bidessini). Entomologica Scandinavica 29(3): 281-314. (2)
Internet References
The Aquatic Invertebrates of Texas - Stephen W. Ziser, 2010
Works Cited
1.Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with emphasis on the fauna of Canada and Alaska
D.J. Larson, Y. Alarie, and R.E. Roughley. 2001. NRC 43253.
2.Revision of the Nearctic Liodessus affinis (Say 1823) species group (Coleoptera: Dytiscidae, Hydroporinae, Bidessini).
Miller, K.B. 1998. Entomologica Scandinavica 29(3): 281-314. 1998. Entomologica Scandinavica.