Overview

Distribution

Biogeography

Nearctis

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Physical Description

Morphology

One caudal spine. Dorsal plate areolations heavy and no pustulation on either plate.

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Leasi, Francesca

Source: Marine Rotifera

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Size

Total length 187-229 µm; the average ratio total length/spine length is constant around 3.75. A slight increase in total length can be observed sometimes in smaller specimens.

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Leasi, Francesca

Source: Marine Rotifera

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Type Information

Collection specimen

holotype for Keratella crassa Ahlstrom, 1943
Catalog number: 1197
Collection: American Museum of Natural History, New York, USA
Prepared by: Myers, F J
Sex/stage/structure: female
Preparation: Slide Preparation

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Collection specimen

Non-type voucher specimen for Keratella crassa Ahlstrom, 1943
Catalog number: 39807
Collection: National Museum of Natural History, Smithsonian Institution, Washington DC, USA
Prepared by: Myers, F J
Sex/stage/structure: females
Preparation: Slide Preparation; Microscope slide
Specimen Count: 3

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Collection specimen

Non-type voucher specimen for Keratella crassa Ahlstrom, 1943
Catalog number: 1371
Collection: Academy of Natural Sciences of Drexel University, Philadelphia, USA
Prepared by: Bennetch, L M
Sex/stage/structure: females
Preparation: Slide Preparation
Specimen Count: 7

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Collection specimen

Non-type voucher specimen for Keratella crassa Ahlstrom, 1943
Catalog number: 0686
Collection: Academy of Natural Sciences of Drexel University, Philadelphia, USA
Prepared by: Myers, F J
Sex/stage/structure: females
Preparation: Slide Preparation
Specimen Count: 4

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Ecology

Habitat

Freshwater and marine habitat.

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Leasi, Francesca

Source: Marine Rotifera

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Associations

Known predators

Keratella crassa (Keratella crassa pelagic rotifers) is prey of:
Semotilus atromaculatus
Notemigonus crysoleucas
Lepomis gibbosus
Notropis cornutus
Actinopterygii
Epishura lacustris
Cyclops vernalis
Mesocyclops edax
Tropocyclops prasinus
Leptodora kindtii
Asplanchna
Perca flavescens
Micropterus salmoides
Ambloplites rupestris
Pomoxis nigromaculatus
Notemigonus crysoleucus

Based on studies in:
USA: New York, Bridge Brook (Lake or pond)
USA: Wisconsin, Little Rock Lake (Lake or pond)

This list may not be complete but is based on published studies.
  • Havens K (1992) Scale and structure in natural food webs. Science 257:1107–1109
  • Martinez ND (1991) Artifacts or attributes? Effects of resolution on the Little Rock Lake food web. Ecol Monogr 61:367–392
Creative Commons Attribution 3.0 (CC BY 3.0)

© SPIRE project

Source: SPIRE

Trusted

Article rating from 0 people

Average rating: 2.5 of 5

Known prey organisms

Keratella crassa (Keratella crassa pelagic rotifers) preys on:
Cryptomonas ovata
Cryptomonas erosa
nanoflagellates
Chroococcus
Merismopedia
Gomphosphaeria
Rhabdoderma
Aphanothece
Crucigenia
Euastrum
Oocystis
Schroederia
Tetraedron
Ankistrodesmus
Elakatothrix
Scenedesmus
Chroomonas
Cryptomonas

Based on studies in:
USA: New York, Bridge Brook (Lake or pond)
USA: Wisconsin, Little Rock Lake (Lake or pond)

This list may not be complete but is based on published studies.
  • Havens K (1992) Scale and structure in natural food webs. Science 257:1107–1109
  • Martinez ND (1991) Artifacts or attributes? Effects of resolution on the Little Rock Lake food web. Ecol Monogr 61:367–392
Creative Commons Attribution 3.0 (CC BY 3.0)

© SPIRE project

Source: SPIRE

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!