Keratella mexicanasp. nov., a new planktonic rotifer from Aguascalientes, Mexico
✍ Scribed by L.A. Kutikoval; M. Silva-Briano
- Publisher
- Springer
- Year
- 1995
- Tongue
- English
- Weight
- 257 KB
- Volume
- 310
- Category
- Article
- ISSN
- 1573-5141
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✦ Synopsis
A new species of Keratella is described from a small reservoir in Aguascalientes, Mexico. The species appears related to K slacki Berzilps, 1963 and K lenzi Hauer, 1953.
Material examined
The last 10 years, the zooplankton of the neotropical inland waters has received considerable attention by rotiferologists. According to the literature (Koste, 1978;Koste & Paggi, 1982;Koste & Robertson, 1990) more than 500 rotifer taxa occur in neotropical waters, including 18 species and subspecies of the genus Keratella Bory de St. Vincent, 8 of which are probable endemics (Dumont, 1983;Turner, 1987). The present paper reports on a new species of Keratella, found in an artificial irrigation pond in Aguascalientes State, a transition area between the neotropic and nearctic areas. The sample (preserved in 5% formalin) contained abundant calanoid copepods (Mastigodiaptomus montezumae (Brehm), M. albuquerquensis Herrick, Leptodiaptomus siciloides Lilljeborg), cyclopoid copepods (Acanthocyclops robustus (Sars), Mesocyclops sp) cladocera (Diaphanosoma birgei Korinek, Moina micrura Kurz, Daphnia parvula Fordyce, Daphnia sp, Bosmina (Eubosmina) hagmanni (Stingelin)), and a few rotifer species (Keratella americana Carlin, K tropica (Apstein), K. cochlearis (Gosse), Kellicottia bostoniensis (Rousselet), Rotaria neptunia (Ehrenberg)).
Keratella mexicana sp. nov.
(Figs 1-11)
Holotype, one female in a permanent, gelatin-glycerine glass slide mount (Rot. 54998), paratypes females in permanent slides (Rot. 54999-55004), and 70 females in two glass small bottles preserved in 5% formalin.