Overview

Comprehensive Description

Description

Aggregate form with anterior end of body rounded, the posterior end is somewhat fusiform. The test is bluntly pentagonal and never echinate. M1-M3 and M4-M5 are fused mid-dorsally; both groups of muscle bands are separated in lateral view. The nucleus has a posterior projection. The test is pentagonal posteriorly. The number of muscle fibres in M1-M5 is 15-17, normally 16. The atrial opening is not central and there is a posterior lateral protuberance on one side only. Solitary form with smooth test, atrial palps simple and straight; lateralprojections small, medioventral projections are small and of unequal length, the anterior ones are the smallest. All test projections are echinate. M1-M4 are continuous dorsally and ventrally; M5 is narrowly interupted ventrally. M2-M4 and M5-M6 are converged mid-dorsally over a short distance only. The stomach partly extends into the middle posterior projection.
  • Heron, A. C, McWilliam, P. S., Dal Pont, G.1988.Length-weight relation in the salp Thalia democratica and potential of salps as a source of food.Marine Ecology Progress Series.42:125-132
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Census of Marine Zooplankton

Source: Census of Marine Zooplankton

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Distribution

Cape Cod southward (rare north of Cape Cod)
  • North-West Atlantic Ocean species (NWARMS)
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

semi-cosmopolitan in temperate to tropical waters
  • UNESCO-IOC Register of Marine Organisms
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Cosmopolitan, eurythermic species from warmer waters; roughly occurring between ca. 60 N and ca. 40 S. Also present in the Mediterranean Sea.
 
Depth distribution: Epipelagic, living in the upper 100 m, does not perform diurnal vertical migration.
  • Heron, A. C, McWilliam, P. S., Dal Pont, G.1988.Length-weight relation in the salp Thalia democratica and potential of salps as a source of food.Marine Ecology Progress Series.42:125-132
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Census of Marine Zooplankton

Source: Census of Marine Zooplankton

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Physical Description

Size

                                                               
Size type:      Stage: agregate 
Min length: 0.5 mm
Max length: 12 mm
Size type:      Stage: Solitary 
Min length: 1.7
Max length: 12
Size type: Total length     Stage: Agregate 
Length: 18.2 mm
Min length: 1.8 mm
Max length: 18.2 mm
Size type: Total length     Stage: Solitary 
Length: 11.7 mm
Min length: 2.3 mm
Max length: 11.7 mm
  • Heron, A. C, McWilliam, P. S., Dal Pont, G.1988.Length-weight relation in the salp Thalia democratica and potential of salps as a source of food.Marine Ecology Progress Series.42:125-132
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Census of Marine Zooplankton

Source: Census of Marine Zooplankton

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Type Information

Paratype for Thalia democratica Forskäl, 1775
Catalog Number: USNM 6474
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Preparation: Alcohol (Ethanol)
Year Collected: 1909
Locality: Luzon Island, Legazpi, Albay, Philippines, Gulf of Albay, North Pacific Ocean
Depth (m): 260 to 260
Vessel: Albatross R/V
  • Paratype: Forskäl, P. 1775. Desc. Anim. 4: 112-117.
Creative Commons Attribution 3.0 (CC BY 3.0)

© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Holotype for Thalia democratica Forskäl, 1775
Catalog Number: USNM 6473
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Preparation: Alcohol (Ethanol)
Year Collected: 1909
Locality: Luzon Island, Legazpi, Albay, Philippines, Gulf of Albay, North Pacific Ocean
Depth (m): 260 to 260
Vessel: Albatross R/V
  • Holotype: Forskäl, P. 1775. Desc. Anim. 4: 112-117.
Creative Commons Attribution 3.0 (CC BY 3.0)

© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Ecology

Habitat

Epipelagic
  • Census of Marine Zooplankton, 2006. NOAA Ship Ronald H Brown, deployment RHB0603, Sargasso Sea. Peter Wiebe, PI. Identifications by L. Bercial, N. Copley, A. Cornils, L. Devi, H. Hansen, R. Hopcroft, M. Kuriyama, H. Matsuura, D. Lindsay, L. Madin, F. Pagè
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Depth range based on 270 specimens in 2 taxa.
Water temperature and chemistry ranges based on 153 samples.

Environmental ranges
  Depth range (m): 1 - 4791
  Temperature range (°C): 2.392 - 26.893
  Nitrate (umol/L): 0.156 - 43.454
  Salinity (PPS): 33.402 - 38.518
  Oxygen (ml/l): 0.401 - 6.408
  Phosphate (umol/l): 0.030 - 3.366
  Silicate (umol/l): 0.798 - 145.387

Graphical representation

Depth range (m): 1 - 4791

Temperature range (°C): 2.392 - 26.893

Nitrate (umol/L): 0.156 - 43.454

Salinity (PPS): 33.402 - 38.518

Oxygen (ml/l): 0.401 - 6.408

Phosphate (umol/l): 0.030 - 3.366

Silicate (umol/l): 0.798 - 145.387
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

General Ecology

Ecology

The marine pelagic tunicate Thalia democratica has one of the fastest individual growth rates and shortest generation times of any multicellular animal.
  • Heron, A. C, McWilliam, P. S., Dal Pont, G.1988.Length-weight relation in the salp Thalia democratica and potential of salps as a source of food.Marine Ecology Progress Series.42:125-132
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Census of Marine Zooplankton

Source: Census of Marine Zooplankton

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Life History and Behavior

Behavior

Diet

plankton feeder
  • North-West Atlantic Ocean species (NWARMS)
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!