Parduczia

Parduczia is a genus of karyorelict ciliates in the family Geleiidae.

Parduczia
Scientific classification
Kingdom: Chromista
Superphylum: Alveolata
Phylum: Ciliophora
Subphylum: Postciliodesmatophora
Class: Karyorelictea
Order: Protoheterotrichida
Family: Geleiidae
Genus: Parduczia
Dragesco, 1999
Species

See text.

Parduczia species are filiform to serpentiform ciliates characterized by their giant size (1200 to 2500 µm on average) and their very long buccal split.[1]

The genus name[lower-alpha 1] is a taxonomic patronym honoring the protistologist Béla Párducz (1911–1964).[3][4]

Systematics

Five species are currently described in the genus Parduczia.[1]

  • Parduczia arcachonense (Nouzarède, 1965) Dragesco, 1999
  • Parduczia filiformis (Nouzarède, 1977) Dragesco, 1999
  • Parduczia martinicense (Nouzarède, 1977) Dragesco, 1999
  • Parduczia murmanica (Raikov, 1962) Dragesco, 1999
  • Parduczia orbis (Fauré-Fremiet, 1950) Dragesco, 1999 is the type species of the genus.

Phylogeny

Comparison and phylogenetic analysis of 18S rRNA sequences showed that Parduczia orbis is the sister group to Corlissina maricaensis. In turn, these two genera form a clade with Geleia.[5]

Alternative genetic code

An alternative genetic code is used by the nuclear genome of Parduczia sp.[2] This code corresponds to the translation table 27 and involves the unusual reassignment of the three standard termination codons to sense codons:

DNA codons RNA codons This code (27) Standard code (1)
TAA UAA Gln (Q) Ter (*)
TAG UAG Gln (Q) Ter (*)
TGA UGA Ter (*) or Trp (W) Ter (*)

Notes
  1. In some publications, the genus name is misspelt as "Parduzcia".[2]

References
  1. Dragesco, Jean (26 November 1999). "Révision des Geléiides (Ciliophora, Karyorelictea)" (PDF). Stapfia. 66: 1–91.
  2. Swart, Estienne Carl; Serra, Valentina; Petroni, Giulio; Nowacki, Mariusz (28 July 2016). "Genetic Codes with No Dedicated Stop Codon: Context-Dependent Translation Termination". Cell. 166 (3): 691–702. doi:10.1016/j.cell.2016.06.020. PMC 4967479. PMID 27426948.
  3. Kaszab, Z. (1966). "In Memoriam Dr. Béla Párducz (1911—1964)" (PDF). Annales Historico-Naturales Musei Nationalis Hungarici. 58: 5–9.
  4. Corliss, John O. (1978). "A Salute to Fifty-Four Great Microscopists of the Past: A Pictorial Footnote to the History of Protozoology. Part I.". Transactions of the American Microscopical Society. 97 (4): 419–458. doi:10.2307/3226162. ISSN 0003-0023. JSTOR 3226162. PMID 371094.
  5. Silva-Neto, Inácio D.; Campello-Nunes, Pedro H.; Schlegel, Martin; Fernandes, Noemi (2015-12-01). "Description and phylogenetic position of Corlissina maricaensis gen. nov., sp. nov. (Karyorelictea, Geleiidae), a novel interstitial ciliate from Brazil, with redefinition of the family Geleiidae". International Journal of Systematic and Evolutionary Microbiology. 65 (12): 4297–4308. doi:10.1099/ijsem.0.000579. ISSN 1466-5026. PMID 26338067.
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