On the geographic distribution of Loxodes rex (protozoa, ciliophora) and other alleged endemic species of ciliates

Authors: Esteban, G.F., Finlay, B.J., Charubhun, N. and Charubhun, B.

Journal: Journal of Zoology

Volume: 255

Issue: 2

Pages: 139-143

ISSN: 0952-8369

DOI: 10.1017/S0952836901001200

Abstract:

There is no consensus on the question of whether or not free-living protist species have biogeographies, with the strongest disagreement coming from advocates of the hypothesis that the extraordinary abundance of protists drives their ubiquitous dispersal. If the probability of a species being ubiquitous is a function of its absolute global abundance, then the species that are least likely to be ubiquitous are those with relatively small global populations, i.e. the largest species. Among the free-living ciliated protozoa, a prime candidate for such an organism must be the large (∼1200 μm long), unmistakable, fragile, non-encysting karyorelictid Loxodes rex. This ciliate was known only from fresh waters in tropical Africa and it was long considered to be a rare example of an endemic ciliate. Here it is reported that Loxodes rex is thriving in a pond in Thailand. The status of other alleged endemic ciliate species is discussed.

Source: Scopus

On the geographic distribution, of <i>Loxodes rex</i> (Protozoa, Ciliophora) and other alleged endemic species of ciliates

Authors: Esteban, G.F., Finlay, B.J., Charubhun, N. and Charubhun, B.

Journal: JOURNAL OF ZOOLOGY

Volume: 255

Pages: 139-143

ISSN: 0952-8369

DOI: 10.1017/S0952836901001200

Source: Web of Science (Lite)

On the geographic distribution of Loxodes rex (Protozoa, Ciliophora) and other alleged endemic species of ciliates

Authors: Esteban, G.F., Finlay, B.J., Charubhun, N. and Charubhun, B.

Journal: Journal of Zoology

Volume: 255

Pages: 139-143

Abstract:

There is no consensus on the question of whether or not free-living protist species have biogeographies, with the strongest disagreement coming from advocates of the hypothesis that the extraordinary abundance of protists drives their ubiquitous dispersal. If the probability of a species being ubiquitous is a function of its absolute global abundance, then the species that are least likely to be ubiquitous are those with relatively small global populations, i.e. the largest species. Among the free-living ciliated protozoa, a prime candidate for such an organism must be the large (~1200 mm long), unmistakable, fragile, non-encysting karyorelictid Loxodes rex. This ciliate was known only from fresh waters in tropical Africa and it was long considered to be a rare example of an endemic ciliate. Here it is reported that Loxodes rex is thriving in a pond in Thailand. The status of other alleged endemic ciliate species is discussed.

Source: Manual