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Morphology and morphogenesis of a new marine hypotrichous ciliate (Protozoa, Ciliophora, Pseudoamphisiellidae), including a report on the small subunit rRNA gene sequence
Li, L.; Song, W.; Al-Rasheid, K.A.S.; Warren, A.; Li, Z.; Xu, Y.; Shao, C. (2010). Morphology and morphogenesis of a new marine hypotrichous ciliate (Protozoa, Ciliophora, Pseudoamphisiellidae), including a report on the small subunit rRNA gene sequence. Zool. J. Linn. Soc. 158(2): 231-243. https://hdl.handle.net/10.1111/j.1096-3642.2009.00546.x
In: Zoological Journal of the Linnean Society. Academic Press: London. ISSN 0024-4082; e-ISSN 1096-3642
Peer reviewed article  

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Trefwoorden
    Classification > Taxonomy
    Morphogenesis
    Taxa > Species > New taxa > New species
    Pseudoamphisiella elongata Li, Song, Al-Rasheid, Warren, Li, Xu & Shao, 2008 [WoRMS]
    Marien
Author keywords
    hypotrichida; infraciliature; new species; Pseudoamphisiella elongata spnov.; stomatogenesis; taxonomy

Auteurs  Top 
  • Li, L.
  • Song, W.
  • Al-Rasheid, K.A.S.
  • Warren, A.
  • Li, Z.
  • Xu, Y.
  • Shao, C.

Abstract
    The morphology and morphogenesis of a new marine hypotrichous ciliate Pseudoamphisiella elongata sp. nov. isolated from mussel-farming waters near Qingdao, China, are described based on living and protargol-impregnated specimens. Morphologically, the new species can be distinguished from its known congeners by its elongate body shape, narrow oral field, having fewer dorsal kineties and caudal cirri, more marginal cirri, and differentiated pretransverse cirri. The identification as a new species is firmly supported by the sequences of the small subunit ribosomal rRNA (SSU rRNA) gene, compared with other known Pseudoamphisiella species, and the phylogenetic analysis. The morphogenetic characteristics can be summarized as follows: (1) the parental adoral zone of membranelles and undulating membranes are entirely rebuilt by the oral primordium, which develops de novo in the outermost region of the cortex; (2) the oral primordium in the opisthe and the frontoventral-transverse (FVT) anlagen in both dividers are formed independently on the cell surface; (3) an 'extra' marginal anlage originates to the right of the right marginal anlage, and develops into two or three 'extra' marginal cirri; (4) the FVT anlagen develop in the primary mode, and the last FVT streak contributes two migratory cirri (frontoterminal cirri), which are probably resorbed; (5) the right marginal anlagen in both dividers occur close together, independent of the old structure. (C) 2010 The Linnean Society of London, Zoological Journal of the Linnean Society, 2010, 158, 231-243. doi: 10.1111/j.1096-3642.2009.00546.x

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