Some Rotifera from Ile Amsterdam (Terres Australes et Antarctiques Françaises), with description of Brachionus amsterdamensis sp. nov. (Monogononta : Brachionidae)

Abstract

A preliminary study of the rotifer fauna of He Amsterdam (T.A.A.F.), southern Indian Ocean, yielded seven taxa. Brachionus amsterdamensis sp. nov. is described. Information on the morphology of the trophi of Brachionus dimidiatus is presented. Quelques rotifères de l'Ile Amsterdam (T.A.A.F.), avec description de

Disentangling the morphological stasis in two rotifer species of the Brachionus plicatilis species complex

“…Malleate type, with all the characteristics of the genus as described by Segers et al (1993), and found in detailed analyses of other co-generic species (e.g. Ciros-Pé rez et al, 2001;De Smet, 2001). Fulcrum short, flattened laterally (Fig.…”

“…Trophi of Brachionidae have a species-specific shape and size, and are often used as a reliable taxonomic character (Segers et al, 1993;De Smet, 2001). These structures range in the tens of microns in size, and only Scanning Electron Microscopy (SEM) allows a detailed analysis.…”

“…The masticatory apparatus in particular is considered as a diagnostic trait for many rotifer taxa (e.g. De Smet, 2001;Ricci et al, 2003), and might also be indicative of ecological differentiation regarding food preferences.…”

Ultra Structural Comparison of Trophi in Species of the Genus <i>Brachionus</i> Pallas, 1766 in Aguascalientes State, Mexico

“…Features like trophi are only found in rotifers; the only species that appears closely related in regard to the complex masticatory apparatus is Gnathostomulid, which also possesses a complex structure with a set of jaws. Nevertheless, only in rotifers, the trophi is used as a tool to identify species as well as an instrument for reconstructing the phylogeny of the organism [3] [4]; furthermore, trophi is the key structure in rotifer taxonomy [5] [6] in genetics with cryptic speciation [7], and morphometric analysis [8].…”