Cohort (biology)

The cohort (Latin: cohors = heap, crowd) is a rank of biological systematics . It is used to classify and name living beings ( taxonomy ).

zoology

In the case of extensive taxa, it is inserted between two ranks in order to better illustrate the phylogenetic relationships. In addition, for further subdivision immediately above the cohort an over cohort ( supercohort ) and directly beneath a lower cohort ( subcohort be present).

The position of the cohort within the ranks of the classical system is not precisely defined. Usually it is inserted between the subclass and the superordinate level or order.

Example: Systematics of bony fish according to Wiley & Johnson, 2010

• Sub-class real bony fish (Teleostei)
  • Cohort Euteleosteomorpha
    • Under cohort Protacanthopterygii
      • Order golden salmon (Argentiniformes)
      • Order Salmoniformes
        • Suborder pike-like (Esocoidei)
        • Suborder smelt- like (Osmeroidei)
        • Subordination salmonid fish (Salmonoidei)
    • Neoteleostei sub-cohort
      • Order deep-sea tadpole-like (Ateleopodiformes)
      • Order Maulstachler (Stomiiformes)

etc.

In the system of mites according to Krantz & Walter, 2009, the cohorts are inserted between the subordinate groups and the superfamilies . Here, too, there are overcohorts and undercohorts.

Example:

• Subordination prostigmata
  • Over cohort Anystides
    • Anystina cohort
      • • Superfamily Adamystoidea
        • Superfamily Anystoidea
        • Superfamily Caeculoidea
        • Superfamily Paratydeoidea
        • Superfamily Pomerantzioidea
    • Parasite Gonina Cohort
      • Sub-cohort Hydrachnidiae ( freshwater mites )
        • Superfamily Hydrovolzioidea
        • Superfamily Hydrachnoidea
        • Superfamily Hydryphantoidea
        • Superfamily Hygrobatoidea
        • Superfamily Arrenuroidea
      • Stygothrombiae subcohort
        • Superfamily Stygothrombioidea
      • Under cohort Erythraiae
        • Superfamily Calyptostomatoidea
        • Superfamily Erythraeoidea
      • Under cohort Trombidiae
        • Superfamily Trombidioidea
        • Superfamily Chyzerioidea
        • Superfamily Trombiculoidea
        • Superfamily Tanaupodoidea

etc.

botany

In botany, the cohort rank fell out of use as early as the late 19th century. Here, too, their use was not uniform: While Stephan Ladislaus Endlicher uses it above the class , George Bentham and Joseph Dalton Hooker use it on an equal footing with today's order .

Individual evidence

1. ^ EO Wiley & G. David Johnson: A teleost classification based on monophyletic groups. in Joseph S. Nelson , Hans-Peter Schultze & Mark VH Wilson: Origin and Phylogenetic Interrelationships of Teleosts. 2010, Verlag Dr. Friedrich Pfeil, Munich, ISBN 978-3-89937-107-9
2. ↑ GW Krantz and DE Walter (Eds.): A Manual of Acarology . Third edition, Texas Tech University Press, 2009
3. ↑ Helmut Genaust: Etymological dictionary of botanical plant names. 3rd, completely revised and expanded edition. Birkhäuser, Basel / Boston / Berlin 1996, ISBN 3-7643-2390-6 (reprint ISBN 3-937872-16-7 ).

literature

• Keyword: cohort . In: Lexicon of Biology . Volume 5, page 72, Verlag Herder, Freiburg, 1988 ISBN 3-451-19645-X