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Family Daphnidae
  
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Ceriodaphnia lacustris
  littoral and limnetic, usually nearshore or in the warmer upper layers of water. Found summer and fall, peaking August-October. Males and ephippial females September-October. Length to 0.9mm.

1 of 3 Ceriodaphnia lacustris photos in the SWMS collection

Globe icon indicates link to a non-NOAA site. Southwest Missouri State University Zooplankton Project

Ceriodaphnia lacustris

Globe icon indicates link to a non-NOAA site.Jerry Evans, CENTEX Naturalist

Ceriodaphnia laticaudata
  littoral and limnetic, usually nearshore or in the warmer upper layers of water. Found summer and fall, peaking August-October. Males and ephippial females September-October. Length to 1mm, males smaller.

Ceriodaphnia pulchella
  littoral and limnetic, usually nearshore or in the warmer upper layers of water. Found summer and fall, peaking August-October. Males and ephippial females September-October. Length to 0.7mm, males slightly smaller.

Ceriodaphnia pulchella microphotograph

Globe icon indicates a link to a non-NOAA siteVattenloppor

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Ceriodaphnia quadrangula
Globe icon indicates link to a non-NOAA site.Profile - Cladocerans of the Thompson-Okanagan region C. quadrangula is found primarily among inshore weeds, but also occurs limnetically - usually nearshore or in the warmer upper layers of water. Found summer and fall, peaking August-October. Males and ephippial females September-October. Length to 1mm, males smaller. Length to 1mm, males smaller.

1 of 4 Ceriodaphnia quadrangula photos in the SWMS collection

Globe icon indicates link to a non-NOAA site.Southwest Missouri State University Zooplankton Project

Ceriodaphnia reticulata
Globe icon indicates link to a non-NOAA site.Profile - Cladocerans of the Thompson-Okanagan region Littoral and limnetic, usually nearshore or in the warmer upper layers of water. Found summer and fall, peaking August-October. Males and ephippial females September-October. C. reticulata is small, not exceeding one millimetre.

1 of 4 photos of Ceriodaphnia reticulta

Globe icon indicates link to a non-NOAA site.Taxonomy of Cladocera - Ruediger Rudolf

Ceriodaphnia reticulata Courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

Ceriodaphnia reticulata - Courtesy of Wim van Egmond

Globe icon indicates link to a non-NOAA site.Waterfleas - Jan Parmentier & Wim van Egmond

Daphnia ambigua
Globe icon indicates link to a non-NOAA site.Profile - The Cladoceran Website - University of Guelph, Canada In the Great Lakes, very low abundances post-1970. Adults often possess a distinctive spine-like helmet, whose size is dependent on temperature and Chaoborus density. In habitats without this predator, adults lack helmets. Length to 1.3mm.

Line drawing of Daphnia ambigua

Globe icon indicates link to a non-NOAA site.A Key to Cladocerans (Custacea) of British Columbia

1 of 8 Daphnia ambigua photos inthe SWMS collection

Globe icon indicates link to a non-NOAA site.Southwest Missouri State University Zooplankton Project

Daphnia ambigua Courtesy ofAn Image-Based Key To The Zooplankton Of The Northeast (USA) Daphnia ambigua Courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

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Daphnia galeata
Globe icon indicates link to a non-NOAA site.Profile - Cladocerans of the Thompson-Okanagan region Deep, transparent waters. Typically by day, ~10 meters below surface (higher than Daphnia retrocurva); rise to surface ~1.5 hours after sunset to midnight and again 1 hour before sunrise. Also found near bottom in shallow waters. Swarms may exceed 20,000,000 per cubic meter. Length to 3mm, males much smaller.

Daphnia galeata line drawing

Globe icon indicates link to a non-NOAA site.A Key to Cladocerans (Crustacea) of British Columbia

Daphnia galeata Courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

Daphnia longiremis

Globe icon indicates link to a non-NOAA site.Profile - Cladocerans of the Thompson-Okanagan region

Inhabits lakes throughout the northern parts of North America including all of Canada and the northern United States; the Great Lakes is at the southern edge of the global distribution. Prefers cold waters - during summer temperature stratification it is generally restricted to deeper waters below the thermocline but above the poorly oxygenated regions of the hypolimnion (disappears from Lake Erie at the onset of oxygen depletion). In the spring and fall when lake waters cool down it can be found throughout the water column. Found in low numbers year-round. Length to 1.2mm.

Daphnia longiremus Courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

Line drawing of Daphnia longiremus

Globe icon indicates link to a non-NOAA site.A Key to Cladocerans (Crustacea) of British Columbia

Daphnia lumholtzi
Bird icon indicates link to a non-GLERL NOAA siteFact Sheet - IL-IN Sea Grant Exotic. Moving northward from traditional range. Length to 5.6mm (including spines). Large spines limit the ability of small fish to eat this specie.

Photo of Daphnia lumholtzi from the SWMS collection

Globe icon indicates link to a non-NOAA site.Southwest Missouri State University Zooplankton Project

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Daphnia parvula
Globe icon indicates link to a non-NOAA site.Profile - The Cladoceran Website - University of Guelph, Canada Green Bay and Milwaukee Harbor - rare. May hybridize with D. retrocurva. Length to 1.4mm.

Daphnia parvula Courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

Daphnia parvula photo from the SWMS collection

Globe icon indicates link to a non-NOAA site.Southwest Missouri State University Zooplankton Project

Daphnia pulex

Globe icon indicates link to a non-NOAA site.Profile - The Cladoceran Website - University of Guelph, Canada
Globe icon indicates link to a non-NOAA site.Profile - Cladocerans of the Thompson-Okanagan region

 Numerous Great Lakes reports, but easily confused with Daphnia retrocurva so ID uncertain. Daphnia pulex is normally found in small ponds with abundant organic matter. Length to 3.5mm.

Photo of a sexual Daphnia pulex female with ephippia

Globe icon indicates link to a non-NOAA site.The Cladoceran Website - University of Guelph, Canada

Daphnia pulex Courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

Line drawing of Daphnia pulex

Globe icon indicates link to a non-NOAA site.A Key to Cladocerans (Crustacea) of British Columbia

Daphnia retrocurva
Globe icon indicates link to a non-NOAA site.Profile - The Cladoceran Website - University of Guelph, Canada One of the most abundant cladocerans in the Great Lakes (average summer peak densities 1,200-24,000 per cubic meter). Typically nearshore appearing in open water only at peak abundance (late summer). By day located below the thermocline, rising to the surface sunset to sunrise. May hybridize with D. parvula. Length to 1.8mm, including helmet.

1 of 6 Photos of parthenogenetic female Daphnia retrocurva (others are closeups)

Globe icon indicates link to a non-NOAA site.The Cladoceran Website - University of Guelph, Canada

Daphnia retrocurva Courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)Daphnia retrocurva courtesy of An Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

Line drawing of Daphnia retrocurva

Globe icon indicates link to a non-NOAA site.A Key to Cladocerans (Crustacea) of British Columbia

1 of 8 Daphnia retrocurva photos in the SWMS collectionShort helmet morphotype

Globe icon indicates link to a non-NOAA site.Southwest Missouri State University Zooplankton Project

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Daphnia schodleri

Daphnia schodleri Courtesy ofAn Image-Based Key To The Zooplankton Of The Northeast (USA)

Globe icon indicates link to a non-NOAA site.An Image-Based Key To The Zooplankton Of The Northeast (USA)

 Collected in 1970's

Scapholeberis aurita
Globe icon indicates link to a non-NOAA site.Profile - University of Alberta Occassional, near surface, littoral. One of the few cladocerans that swims on its back

Scapheloberis aurita photo - Alberta, Canada

Globe icon indicates link to a non-NOAA site.Bio-DiTRL - University of Alberta

Scapholeberis kingi
aka S. mucronata  

1 of 3 Scapholeberis kingi photos in the SMSU collection

Globe icon indicates link to a non-NOAA site.Southwest Missouri State University Zooplankton Project

Simocephalus exspinosus
Globe icon indicates link to a non-NOAA site.Profile - Zooplankton of the Great Lakes - Central Michigan University The three Simocephalus species of the Great Lakes are distinguished by the amount of pectin on their post-abdominal claws. Found in heavily vegetated littoral areas. Length to 4mm.

1 of 4 Simocephalus exspinosus photos inthe SWMS collection

Globe icon indicates link to a non-NOAA site.Southwest Missouri State University Zooplankton Project

 

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Simocephalus serrulatus

Globe icon indicates link to a non-NOAA site.Profile - Zooplankton of the Great Lakes - Central Michigan University
Globe icon indicates link to a non-NOAA site.Profile - Cladocerans of the Thompson-Okanagan region
Globe icon indicates link to a non-NOAA site.Profile - Bio-DiTRL - University of Alberta

 The three Simocephalus species of the Great Lakes are distinguished by the amount of pectin on their post-abdominal claws. Exclusively littoral, it is often found attached to aquatic plants, using sticky mucus produced from a gland at the back of the neck Abundant in the littoral areas of Lake Erie. Length to 4mm.

Line drawing of Simocephalus serrulatus

Globe icon indicates link to a non-NOAA site.A Key to Cladocerans (Crustacea) of British Columbia

1 of 3 photos of Simocephalus serrulatus

Globe icon indicates link to a non-NOAA site.CENTEX NATURALIST - Bell County, Texas

Simocephalus serrulatus

Globe icon indicates link to a non-NOAA site.Bio-DiTRL - University of Alberta

Simocephalus vetulus

Globe icon indicates link to a non-NOAA site.Profile - Zooplankton of the Great Lakes - Central Michigan University
Globe icon indicates link to a non-NOAA site.Profile - Cladocerans of the Thompson-Okanagan region

 The three Simocephalus species of the Great Lakes are distinguished by the amount of pectin on their post-abdominal claws. Found in heavily vegetated littoral areas - attached to the substrate or vegetation. Abundant in the littoral areas of Lake Erie. Length to 4mm.

Line drawing of Simocephalus vetulus

Globe icon indicates link to a non-NOAA site.A Key to Cladocerans (Crustacea) of British Columbia

 

1 of 4 photos of Simocephalus vetulus

Globe icon indicates link to a non-NOAA site.Taxonomy of Cladocerans - Ruediger Rudolf

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Last Updated: 2007-02-09

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