Cochliopodium

Cochliopodium is a Himatismenida genus.[1]

Cochliopodium
Amoeba of the genus Cochliopodium. Phase contrast microscopy. In the center, three digestive vacuoles with algae are visible, and a dark cell nucleus is located just below. The cytoplasm contains a lot of light contractile vacuoles, you can notice yellowish crystals.
Scientific classification
Domain:
Eukaryota
Phylum:
Amoebozoa
Class:
Discosea
Order:
Himatismenida
Family:
Cochliopodiidae
Genus:
Cochliopodium

Hertwig & Lesser 1874
Type species
Cochliopodium pellucidum
Hertwig & Lesser 1874

It has been found in eyewash stations.[2]

It includes:

  • C. actinophorum (Auerbach 1856) Page 1976
  •  ?C. ambiguum Penard 1904
  • C. arabianum Tekle, Gorfu & Anderson 2015
  • C. barki Kudryavtsev, Brown et Smirnov 2004
  • C. bilimbosum (Auerbach 1856) Leidy 1879[3][4]
  • C. clarum Schaeffer 1926
  •  ?C. crassiusculum Penard 1905
  •  ?C. erinaceum Penard 1902
  • C. gallicum Kudryavtsev & Smirnov 2006[5]
  • C. granulatum Penard 1890
  • C. gulosum Schaeffer 1926
  • C. kieliense Kudryavtsev 2006
  • C. larifeili Kudriavtsev 1999
  • C. maeoticum Kudryavtsev 2006
  • C. megatetrastylus Anderson & Tekle 2013
  • C. minus Page 1976[6]
  • C. minutoidum Kudryavtsev 2006
  •  ?C. minutum West 1901
  •  ?C. muscorum Wang 1977
  •  ?C. obscurum Pen.
  •  ?C. papyrum Bovee 1958
  • C. pentatrifurcatum Tekle et al. 2013
  • C. plurinucleolum Geisen et al. 2014
  •  ?C. radiosum Biernacka 1963
  •  ?C. silvaticum Varga 1935
  • C. spiniferum Kudryavtsev 2004
  •  ?C. spumosum Penard 1904
  • C. vestitum (Archer 1871) Archer 1877

Recombination and Meiosis

The Cochliopodium genome includes genes whose functions are employed in the process of genetic recombination suggesting the possibility of a sexual stage.[7] The genome sequence of Cochliopodium minus contains a complete set of genes necessary for meiosis a key stage of sexual reproduction.[8]

References
  1. Kudryavtsev A (July 2006). ""Minute" species of Cochliopodium (Himatismenida): Description of three new fresh- and brackish-water species with a new diagnosis for Cochliopodium minus Page, 1976". Eur. J. Protistol. 42 (2): 77–89. doi:10.1016/j.ejop.2005.12.002. PMID 17070753.
  2. Paszko-Kolva C, Yamamoto H, Shahamat M, Sawyer TK, Morris G, Colwell RR (January 1991). "Isolation of amoebae and Pseudomonas and Legionella spp. from eyewash stations". Appl. Environ. Microbiol. 57 (1): 163–7. Bibcode:1991ApEnM..57..163P. doi:10.1128/aem.57.1.163-167.1991. PMC 182678. PMID 2036003.
  3. Srikanth S, Berk SG (October 1993). "Stimulatory effect of cooling tower biocides on amoebae". Appl. Environ. Microbiol. 59 (10): 3245–9. Bibcode:1993ApEnM..59.3245S. doi:10.1128/aem.59.10.3245-3249.1993. PMC 182444. PMID 8250551.
  4. Hülsmann N, Galil BS (November 2001). "The effects of freshwater flushing on marine heterotrophic protists--implications for ballast water management". Mar. Pollut. Bull. 42 (11): 1082–6. doi:10.1016/S0025-326X(01)00087-X. PMID 11763219.
  5. Kudryavtsev A, Smirnov A (March 2006). "Cochliopodium gallicum n. sp. (Himatismenida), an amoeba bearing unique scales, from cyanobacterial mats in the Camargue (France)". Eur. J. Protistol. 42 (1): 3–7. doi:10.1016/j.ejop.2005.08.001. PMID 17070746.
  6. Dyková I, Lom J, Machácková B (November 1998). "Cochliopodium minus, a scale-bearing amoeba isolated from organs of perch Perca fluviatilis". Dis. Aquat. Org. 34 (3): 205–10. doi:10.3354/dao034205. PMID 9925426.
  7. Wood FC, Heidari A, Tekle YI. Genetic Evidence for Sexuality in Cochliopodium (Amoebozoa). J Hered. 2017 Oct 30;108(7):769-779. doi: 10.1093/jhered/esx078. PMID: 29036297; PMCID: PMC5892394
  8. Tekle YI, Wang F, Tran H, Hayes TD, Ryan JF. The draft genome of Cochliopodium minus reveals a complete meiosis toolkit and provides insight into the evolution of sexual mechanisms in Amoebozoa. Sci Rep. 2022 Jun 14;12(1):9841. doi: 10.1038/s41598-022-14131-y. PMID: 35701521; PMCID: PMC9198077
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