Daphnia obtusa Kurz, 1875
(a water flea)

Taxonomic hierarchy:
SpeciesDaphnia obtusa (a water flea)
GenusDaphnia (water fleas)
FamilyDAPHNIIDAE (a family of water fleas)
InfraorderCladocera (water fleas)
SuborderONYCHOCAUDATA (a suborder of crustaceans)
OrderDIPLOSTRACA (water fleas)
SubclassPHYLLOPODA (apuses and water fleas)
ClassBRANCHIOPODA (branchiopods)
SubphylumCRUSTACEA (crustaceans)
PhylumARTHROPODA (arthropods)
SuperphylumECDYSOZOA (skin shedders)
CladeBilateria (bilaterally symmetrical animals)
SubkingdomEUMETAZOA (metazoans)
KingdomANIMALIA (animals)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Daphnia obtusa (a water flea) :
1: Daphnia obtusa (a water flea)
7 May 2013 OSGR: SU67 51° 30’ N, 1° 0’ W Vice County: Berks (VC 22) England
in shallow, muddy puddle
Image 1: Claws - microscope low magnificationImage 2: Claws - microscope low magnification (2)Image 3: Claws - microscope low magnification (3)Image 4: Dorsal part of suture - microscope low magnificationImage 5: Female - lateral view - focused on rostrum and antennule - microscope low magnificationImage 6: Female - lateral view - microscope low magnificationImage 7: Female - lateral view - microscope low magnification (2)Image 8: Female - lateral view - microscope low magnification (3)Image 9: Female - lateral view - microscope low magnification (4)Image 10: Female - lateral view - microscope low magnification (5)
2: Daphnia obtusa (a water flea)
12 Aug 2004 OSGR: SU77 51° 30’ N, 0° 60’ W Vice County: Berks (VC 22) England
Swarms of reddish Daphnia between floating leaves just under surface of small weedy artificial pond
Image 1: Female - side view - magnified
3: Daphnia obtusa (a water flea)
14 Mar 2004 OSGR: SU36 51° 20’ N, 1° 30’ W Vice County: Berks (VC 22) England
females, in pond
Image 1: Foot with combs on claws - microscope low magnificationImage 2: Foot with combs on claws - microscope low magnification (2)Image 3: Foot with combs on claws - microscope low magnification (3)Image 4: Head area - microscope low magnificationImage 5: Head - microscope low magnificationImage 6: Lateral view - magnifiedImage 7: Lateral view - magnified (2)Image 8: Lateral view - magnified (3)Image 9: Lateral view - magnified (4)Image 10: Lateral view - magnified (5)Image 11: Lateral view - magnified (6)Image 12: Lateral view - magnified (7)Image 13: Lateral view - magnified (8)
4: Daphnia obtusa (a water flea)
14 Mar 2004 OSGR: SU36 51° 20’ N, 1° 30’ W Vice County: Berks (VC 22) England
females and male, in pond
Image 1: Male - lateral view - microscope low magnificationImage 2: Male - lateral view - microscope low magnification (2)Image 3: Male - lateral view - microscope low magnification (3)Image 4: Male - lateral view - microscope low magnification (4)Image 5: Male - lateral view - microscope low magnification (5)Image 6: Male - lateral view - microscope low magnification (6)Image 7: Male - microscope low magnificationImage 8: Male - microscope low magnificationImage 9: Male - ventral view - microscope low magnification
5: Daphnia obtusa (a water flea)
11 Jan 2004 OSGR: SU66 51° 20’ N, 1° 10’ W Vice County: Berks (VC 22) England
female, in acid pool in Scot’s Pine plantation
Image 1: Face and antennule - microscope low magnificationImage 2: Face - microscope low magnificationImage 3: Head end - microscope low magnificationImage 4: Head - microscope low magnificationImage 5: Lateral view - magnifiedImage 6: Lateral view - magnified (2)Image 7: Lateral view - magnified (3)Image 8: Lateral view - magnified (4)Image 9: Lateral view - magnified (5)Image 10: Lateral view - magnified (6)Image 11: Lateral view - magnified (7)Image 12: Lateral view - magnified (8)Image 13: Markings on carapace - microscope low magnificationImage 14: Spines on claw - microscope low magnificationImage 15: Spines on claw - microscope low magnification (2)Image 16: Spines on claw - microscope low magnification (3)Image 17: Spines on claw - microscope low magnification (4)Image 18: Spines on claw - microscope low magnification (5)Image 19: Tail end - microscope low magnificationImage 20: Tail - microscope low magnificationImage 21: Tail spine - microscope low magnification
6: Daphnia obtusa (a water flea)
18 Apr 1999 OSGR: SU56 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
in large puddle in track
Image 1: Antennule - magnifiedImage 2: Head area - magnifiedImage 3: Head - magnifiedImage 4: Shell-spine - magnifiedImage 5: Surface ornamentation - magnifiedImage 6: Tail - magnifiedImage 7: Whole animal - magnified
7: Daphnia obtusa (a water flea)
18 Apr 1999 OSGR: SU56 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
in large puddle in track
Image 1: Ephippium - magnifiedImage 2: Head - magnifiedImage 3: Shell-spine - magnifiedImage 4: Whole animal - with developing ephippium - magnifiedImage 5: Whole animal - with developing young - magnified
8: Daphnia obtusa (a water flea)
7 Mar 1999 OSGR: SU56 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
in shady pool
Image 1: Whole animal - highly enlargedImage 2: Whole animal - highly enlarged (2)Image 3: Whole animal - highly enlarged (3)Image 4: Whole animal - highly enlarged (4)Image 5: Whole animal - highly enlarged (5)Image 6: Whole animal - highly enlarged (6)Image 7: Whole animal - highly enlarged (7)Image 8: Whole animal - highly enlarged (8)Image 9: Head - magnifiedImage 10: Rostrum - magnifiedImage 11: Rostrum - magnified (2)Image 12: Surface ornamentation - magnifiedImage 13: Tail - magnified
9: Daphnia obtusa (a water flea)
28 Jan 1995 OSGR: SU56 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
In flooded footpath
Image 1: Foot - magnifiedImage 2: Head and tail spine - magnifiedImage 3: Lateral view - microscope low magnification
10: Daphnia obtusa (a water flea) IDENTIFICATION UNCERTAIN
18 Mar 1978 OSGR: SU94 51° 10’ N, 0° 40’ W Vice County: Surrey (VC 17) England
Juvenile, in isolated pond
Image 1: Juvenile - lateral view - magnified
11: Daphnia obtusa (a water flea)
11 Mar 1978 OSGR: SU73 51° 10’ N, 0° 50’ W Vice County: North Hants (VC 12) England
Female, in pond
Image 1: Antennule - magnifiedImage 2: Foot - magnifiedImage 3: Head - magnifiedImage 4: Lateral view - magnifiedImage 5: Lateral view - magnified (2)
12: Daphnia obtusa (a water flea)
11 Mar 1978 OSGR: SU73 51° 10’ N, 0° 50’ W Vice County: North Hants (VC 12) England
Female, in pond
Image 1: Head - magnifiedImage 2: Lateral view - magnified
13: Daphnia obtusa (a water flea)
19 Dec 1970 OSGR: TQ21 50° 50’ N, 0° 10’ W Vice County: East Sussex (VC 14) England
Image 1: Head - lateral view - magnifiedImage 2: Lateral view - magnifiedImage 3: Lateral view - magnified (2)

Daphnia obtusa (a water flea) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Daphnia obtusa (a water flea)
BioInfoBioInfo (www.bioinfo.org.uk) has 0 host/parasite/foodplant and/or other relationships for Daphnia obtusa (a water flea)
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