Physical Description

Morphology

Small copepods (<2.5 mm) with elongate-oval body. Cephalosome and 1st thoracic segment, as well as the 4th and 5th thoracic segments are fused (3 articulated segments in cephalothorax). Posterior corners of the last thoracic segment are rounded. Abdomen slender, 4-segmented in female, 5-segmented in male. Rostrum consists of 2 filaments. A1 does not reach the end of the caudal rami. A1 with 24 segments in female, less in male. Exopodites of P1-P4 3-segmented. Each segment of the exopodite of P1 with an outer spine. Endopodite 1-segmented with 5 setae in P1, 2-segmented in P2, 3-segmented in P3 and P4. No P5 in females. Male P5 uniramous, the left branch slightly longer than the right. The distal segment of the left P5 much shorter than the previous segment and bear a row of spinules and a long, slender, terminal spine. Segments of the right P5 taper distally.

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© Elizaveta A. Ershova

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Ecology

Habitat

Depth range based on 22730 specimens in 10 taxa.
Water temperature and chemistry ranges based on 13021 samples.

Environmental ranges
  Depth range (m): 0 - 2909
  Temperature range (°C): -1.883 - 17.325
  Nitrate (umol/L): 0.000 - 44.900
  Salinity (PPS): 5.708 - 38.164
  Oxygen (ml/l): 0.130 - 9.192
  Phosphate (umol/l): 0.048 - 3.254
  Silicate (umol/l): 0.733 - 173.635

Graphical representation

Depth range (m): 0 - 2909

Temperature range (°C): -1.883 - 17.325

Nitrate (umol/L): 0.000 - 44.900

Salinity (PPS): 5.708 - 38.164

Oxygen (ml/l): 0.130 - 9.192

Phosphate (umol/l): 0.048 - 3.254

Silicate (umol/l): 0.733 - 173.635
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Associations

Known predators

Pseudocalanus (smaller copepods (e.g., Pseudocalanus)) is prey of:
secondary carnivores
tertiary carnivores
invertebrate predators
Ctenophora
Chaetognatha
Actinopterygii

Based on studies in:
unknown: Black Sea (Marine)
unknown (Marine, Pelagic)

This list may not be complete but is based on published studies.
  • T. S. Petipa, E. V. Pavlova, G. N. Mironov, The food web structure, utilization transport of energy by trophic levels in the planktonic communities. In: Marine Food Chains, J. H. Steele, Ed. (Oliver and Boyd, Edinburgh, 1970), 142-167, from p. 154.
  • T. S. Petipa, E. V. Pavlova, G. N. Mironov, The food web structure, utilization transport of energy by trophic levels in the planktonic communities. In: Marine Food Chains, J. H. Steele, Ed. (Oliver and Boyd, Edinburgh, 1970), 142-167 from p. 155.
  • M. R. Landry, A review of important concepts in the trophic organization of pelagic ecosystems, Helgolander wiss. Meeresunters. 30:8-17, from p. 12 (1977).
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© SPIRE project

Source: SPIRE

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Known prey organisms

Pseudocalanus (smaller copepods (e.g., Pseudocalanus)) preys on:
detritus
phytoplankton
saprophagous plankton
microflagellates and perhaps bacteria
Dinoflagellata
Bacillariophyta
ciliates and nauplii

Based on studies in:
unknown: Black Sea (Marine)
unknown (Marine, Pelagic)

This list may not be complete but is based on published studies.
  • T. S. Petipa, E. V. Pavlova, G. N. Mironov, The food web structure, utilization transport of energy by trophic levels in the planktonic communities. In: Marine Food Chains, J. H. Steele, Ed. (Oliver and Boyd, Edinburgh, 1970), 142-167, from p. 154.
  • T. S. Petipa, E. V. Pavlova, G. N. Mironov, The food web structure, utilization transport of energy by trophic levels in the planktonic communities. In: Marine Food Chains, J. H. Steele, Ed. (Oliver and Boyd, Edinburgh, 1970), 142-167 from p. 155.
  • M. R. Landry, A review of important concepts in the trophic organization of pelagic ecosystems, Helgolander wiss. Meeresunters. 30:8-17, from p. 12 (1977).
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Source: SPIRE

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:125Public Records:35
Specimens with Sequences:78Public Species:5
Specimens with Barcodes:51Public BINs:6
Species:7         
Species With Barcodes:7         
          
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Source: Barcode of Life Data Systems (BOLD)

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Barcode data

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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Pseudocalanus

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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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