Microcodides chlaena Gosse 1886
Creators
Description
Microcodides chlaena (Gosse, 1886)
This species was extremely common in the samples. It has previously been recorded in Europe (see e.g. Wulfert 1940; Berzins 1978), the former Soviet Union (Kutikova 1965; 1970) India (Sarma, 1988), Australia (Shiel & Koste 1979) and North and South America (Harring & Myers 1922; Koste 1986, 1988; Nogrady 1989). On Greenland it has been recorded in the Ilulissat region (Bergendal 1892). Koste and Shiel (1987) consider the species as a cosmopolitan.
The species is easily distinguished by the presence of toes with unequal length and lateral antennae in depressions located posterior to a pair of characteristic integumental elevations (Fig. 1 D).
The adult animals are gibbous in lateral view and conical in dorsoventral view (Fig. 1 D); immature animals are considerably smaller, with Sshaped body (Fig. 1 B). The body is divided into a head, a trunk and a foot region. The head is large, especially in the immature specimens. The dorsal part of the trunk has distinct longitudinal folds in the integument and the foot is composed of two pseudosegments. The corona is complicated, consisting of a continuous circumapical band that encircles the buccal field. A pseudotrochus is formed by four rows of long, stiff cirri. All cirri curve away from the mouth opening. Two other paired rows of cirri are located closer to the mouth opening. These cirri are shorter and curve towards the mouth opening. The buccal field is small and comprises a group of motile cilia around the mouth. The brain is large and saccate. Cerebral glands were not identified. A large eyespot is located on the ventral side of the brain. A pair of dorsal antennae is located dorsally on the head. Lateral antennae are located laterally, slightly behind the mid length of the trunk. Each antenna opens inside a small depression in a prominent wingshaped elevation formed by the integument (Fig. 1 D).
A short ciliated esophagus connects the pharynx and stomach. The stomach is large and contains a yellowish material. The gastric glands are granulated and unstalked.
Trophi from six specimens were prepared for SEM. The trophi are modified malleate. The rami are trapezoid, but with elongated, dorsally curved apices. The inner margins of the rami have six small teeth in the basal part; apical rami parts have paired combs with numerous fine denticles (Fig. 3 B). A pair of small, caudally pointed alulae is located on the lateral sides of the rami (Fig. 3 A). A pair of large basifenestrae is visible on the dorsal side (Fig. 3 A); smaller, slightly asymmetric subbasifenestrae are visible on the ventral side (Fig. 3 B). The ventral side furthermore has a pair of basal apophyses bearing a band of sarciopili (Fig. 3 B). A pair of delicate epipharyngeal plates is associated with the apical rami parts (Fig. 3). Fulcrum is short, broadest in distal half. Unci are large with 8 teeth. Principal tooth is bipartite (Fig. 3 B). Manubria are composed of a welldeveloped proximal head and a caudal rod. Proximal head contains three chambers, which all have large apertures.
Measurements: Body (adults): 190–240 µm; body (immature): 90–128 µm; right toe 27 µm; left toe 24 µm; trophi 27 µm; rami 20 µm; fulcrum 6 µm; manubria 16 µm; unci 14 µm.
Other
Published as part of Sørensen, Martin Vinther, 2006, On the rotifer fauna of Disko Island, Greenland, with notes on selected species from a stagnant freshwater lake, pp. 37-49 in Zootaxa 1241 on pages 41-42, DOI: 10.5281/zenodo.273458Files
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Linked records
Additional details
Identifiers
Related works
- Cites
- Figure: 10.5281/zenodo.273459 (DOI)
- Figure: 10.5281/zenodo.273461 (DOI)
- Is part of
- Journal article: 10.5281/zenodo.273458 (DOI)
- Journal article: http://publication.plazi.org/id/FF908D0CFFBEB554FFF6FF8EFFF1FFE0 (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/03A9F574FFBAB551FEFEF92BFEC6F94E (URL)
Biodiversity
- Family
- Epiphanidae
- Genus
- Microcodides
- Kingdom
- Animalia
- Order
- Ploima
- Phylum
- Rotifera
- Scientific name authorship
- Gosse
- Species
- chlaena
- Taxon rank
- species
- Taxonomic concept label
- Microcodides chlaena Gosse, 1886 sec. Sørensen, 2006
References
- Wulfert, K. (1940) Rotatorien einiger ostdeutscher Torfmoore. Archiv fur Hydrobiologie, 36, 552 - 587.
- Berzins, B. (1978) Rotatoria. In: Illies, J. (Ed.), Limnofauna Europeae. Gustav Fischer Verlag, Stuttgard, 54 - 91.
- Kutikova, L. A. (1965) Fauna of the Karelian lakes. Invertebrates. Academy of Sciences of the USSR, Zoological Section, 34, 52 - 70.
- Kutikova, L. A. (1970) The Rotifer Fauna of USSR. Nauka Publishers, Leningrad, 744 pp.
- Sarma, S. S. S. (1988) New records of freshwater (Rotifera) from Indian waters. Hydrobiologia, 160, 263 - 269.
- Shiel, R. J. & Koste, W. (1979) Rotifera recorded from Australia. Transactions of the Royal Society of South Australia, 103, 57 - 68.
- Harring, H. K. & Myers, F. J. (1922) The rotifer fauna of Wisconsin. Transactions of the Wisconsin Academy of Science, Arts and Letters, 20, 553 - 662.
- Koste, W. (1986) Uber die Rotatorienfauna in Gewassern sudostlich von Concepcion, Paraguay, Sudamerika. Osnabrucker naturwissenschaftliche Mitteilungen, 12, 129 - 155.
- Koste, W. (1988) Uber die Rotatorien einiger Stillgewasser in der Umgebung der Biologischen Station Panguana im tropischen Regenwald in Peru. Amazoniana, 10, 303 - 325.
- Bergendal, D. (1892) Beitrage zur Fauna Gronlands. Zur Rotatorienfauna Gronlands. Acta Universitatis Lundensis, Lunds Universitetets Arsskrift. University of Lund, Sweden, 180 pp. Berzins, B. (1949) Einige neue Notommatidae-Arten (Rotatoria) aus Schweden. Hydrobiologia, 1, 312 - 321.
- Koste, W. & Shiel, R. J. (1987) Rotifera from Australian inland waters. II Epiphanidae and Brachionidae (Rotifera: Monogononta). Invertebrate Taxonomy, 7, 949 - 1021.