Poecilostomatoida


Poecilostomatoida
Sapphirina darwinii with egg cases
Scientific classification
Kingdom:
Phylum:
Subphylum:
Class:
Subclass:
Order:
Suborder:
Poecilostomatoida

Thorell, 1859
Families

See text

Poecilostomatoida are an suborder of copepods. Although it was previously considered a separate order,[1][2] recent research showed it to be nested within the Cyclopoida[3]

Contents

Description


The classification of these copepods has been established on the basis of the structure of the mouth. In poecilostomatoids the mouth is represented by a transverse slit, partially covered by the overhanging labrum which resembles an upper lip. Although there is variability in the form of the mandible among poecilostomatoids, it can be generalized as being falcate (sickle-shaped).[1][2]

The antennules are frequently reduced in size and the antennae modified to terminate in small hooks or claws that are used in attachment to host organisms.[1][2]

Life cycle


As with many crustaceans, larval development is metamorphic with immature forms differing greatly from those of adults. Embryos are carried in paired or single sacs attached to first abdominal somite (as seen in the illustration of the female Sapphirina darwinii above right).[4][5]

Ecology


Most poecilostomatoid copepods are ectoparasites of saltwater fish or invertebrates (including among the latter mollusks and echinoderms). They usually attach to the external surface of the host, in the throat-mouth cavity, or the gills.[1][2][6][7] One family of poecilostomatoid copepods, however, have evolved an endoparasitic mode of life and live deep within their hosts' bodies rather than merely attaching themselves to exterior and semi-exterior surface tissue.[1][2]

In addition to typical marine environments, poecilostomatoid copepods may be found in such very particular habitats as anchialine caves and deep sea vents (both hydrothermal vents and cold seeps). Here, many primitive associated copepods belonging to the Poecilostomatoida and Siphonostomatoida and have been found.[7] Representatives of one Poecilostomatoida family have successfully made the transition to freshwater habitats and host animals therein.[1][2]

List of families


There are over sixty families currently recognized within the group:[8]

References


  1. ^ a b c d e f A. G. Humes & G. A. Boxshall (1996). "A revision of the lichomolgoid complex (Copepoda: Poecilostomatoida), with the recognition of six new families". Journal of Natural History. 30 (2): 175–227. doi:10.1080/00222939600771131 .
  2. ^ a b c d e f Joel W. Martin & George E. Davis (2001). An Updated Classification of the Recent Crustacea (PDF). Natural History Museum of Los Angeles County. p. 132.
  3. ^ Khodami, S; McArthur, JV; Blanco-Bercial, L; Martinez Arbizu (2017). "Molecular Phylogeny and Revision of Copepod Orders (Crustacea: Copepoda)" . Scientific Reports. 7 (1): 9164. Bibcode:2017NatSR...7.9164K . doi:10.1038/s41598-017-06656-4 . PMC 5567239 . PMID 28831035 .
  4. ^ J. K. Lowry (October 2, 1999). "Crustacea, the Higher Taxa: Description, Identification, and Information Retrieval" . Archived from the original on March 20, 2019. Retrieved January 22, 2007.
  5. ^ "Introduction to Copepods" (PDF). University of Connecticut. Archived from the original (PDF) on May 13, 2008.
  6. ^ Masahiro Dojiri & Roger F. Cressey (1987). "Revision of the Taeniacanthidae (Copepoda: Poecilostomatoida) parasitic on fishes and sea urchins". Smithsonian Contributions to Zoology. 447 (447): 1–250. doi:10.5479/si.00810282.447.i . hdl:10088/5504 .
  7. ^ a b "Introduction to Copepods" (PDF). University of Connecticut. Archived from the original (PDF) on 2008-05-13. Retrieved 2007-01-22.
  8. ^ Geoff Boxshall, & T. Chad Walter (2019). T. Chad Walter & Geoff Boxshall (ed.). "Poecilostomatoida" . World Copepoda database. World Register of Marine Species. Retrieved May 19, 2019.

External links









Categories: Poecilostomatoida | Copepods | Arthropod suborders




Information as of: 07.06.2021 11:37:09 CEST

Source: Wikipedia (Authors [History])    License : CC-BY-SA-3.0

Changes: All pictures and most design elements which are related to those, were removed. Some Icons were replaced by FontAwesome-Icons. Some templates were removed (like “article needs expansion) or assigned (like “hatnotes”). CSS classes were either removed or harmonized.
Wikipedia specific links which do not lead to an article or category (like “Redlinks”, “links to the edit page”, “links to portals”) were removed. Every external link has an additional FontAwesome-Icon. Beside some small changes of design, media-container, maps, navigation-boxes, spoken versions and Geo-microformats were removed.

Please note: Because the given content is automatically taken from Wikipedia at the given point of time, a manual verification was and is not possible. Therefore LinkFang.org does not guarantee the accuracy and actuality of the acquired content. If there is an Information which is wrong at the moment or has an inaccurate display please feel free to contact us: email.
See also: Legal Notice & Privacy policy.