Katablepharid
| Katablepharid | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota |
| (unranked): | |
| Class: | |
| Order: | Kathablepharida |
| Family: | Kathablepharidae Vørs 1992
|
| Genus | |
| |
The kathablepharids (also called katablepharids) are a group of
heterotrophic flagellates (Protists)[1] the first species of which was described by Skuja in 1939 as Kathablepharis phoenikoston, (p. 97).[2] His spelling was challenged because of non-compliance with botanical nomenclatural conditions, hence the alternative spelling Katablepharis. As the organism was heterotrophic and usually regarded as 'protozoan', and to favour stability, Skuja's original spelling has largely prevailed. With an anterior pocket and ejectisomes, the kathablepharids were thought initially to be cryptomonads. There were a variety of differences with Cryptomonas and other typical cryptomonads = cryptophytes, such as the thickness, length, and beat pattern of the flagella, their phagotrophic habitat, differences in the ejectisomes, and various features of their ultrastructure. The distinctive characteristics of the group were established from electron microscopical studies by Clay and Kugrens [3] and Vørs.[4] More recently they have been tentatively grouped with the chromalveolates,[5] or distantly with the cryptophytes [6]
Phylogeny
As of 2009, only five genera and ten species have been formally described. Dozens of other DNA sequences (both freshwater and marine) seem to represent further katablepharids which have not been cultured or formally described. They are currently placed in the Hacrobia, a tantative grouping of haptophytes, cryptophytes, katablepharids, telonemids, centrohelids, and perhaps biliphytes[1]
| Hacrobia |
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Classification
Cavalier-Smith, Chao & Lewis 2015 provided the following classification[8]
- Super Class LeucocryptaCavalier-Smith 2015 stat. n. [Kathablepharidophyta Okamoto & Inouye 2005]
- Class LeucocrypteaCavalier-Smith 2004 [Kathablepharidea Okamoto & Inouye 2005; Kathablepharidophyceae Okamoto & Inouye 2005]
- Order KathablepharidaCavalier-Smith 1993
- Family Kathablepharidae Vørs 1992
- Genus RoombiaOkamoto et al. 2009
- Genus Leucocryptos Butcher 1967
- Genus PlatychilomonasLarsen & Patterson 1990
- Genus HatenaOkamoto & Inouye 2006
- Genus Katablepharis Skuja 1939
- Genus
- Family Kathablepharidae Vørs 1992
- Order
- Class
References
- ^ PMID 19759916.
- ^ Skuja, H. 1939. Beitrag zur Algenflora Lettlands II. Acta Horti Botanici Universitatis Latviensis 11/12: 41-168
- ^ Clay, B. & Kugrens, P. 1999. Systematics of the Enigmatic Kathablepharids, Including EM Characterization of the Type Species, Kathablepharis phoenikoston, and New Observations on K. remigera comb. nov., Protist, Volume 150, pages 43-59, ISSN 1434-4610,
- ^ Vørs N (1992) Ultrastructure and autecology of the marine, heterotrophic flagellate Leucocryptos marina (Braarud) Butcher 1967 (Katablepharidaceae/Kathablepharidae), with a discussion of the genera Leucocryptos and Katablepharis/Kathablepharis. Eur J Protistol 28(4): 369–389.
- PMID 19398025.
- PMID 16171184.
- ^ PMID 18612431.
- PMID 26234272