Musculature of two species of rotifers of the family Brachionidae

E.A. Kotikova and O.I. Raikova

Proceedings of the Zoological Institute RAS, 2012, 316(4): 369–379 · https://doi.org/10.31610/trudyzin/2012.316.4.369

Full text

Abstract

The musculature patterns in two species of loricate swimming-crawling rotifers from the family Brachionidae: Platyias quadricornis and Brachionus diversicornis (with malleate type mastax) have been investigated on whole mount preparations by methods of phalloidin fluorescence and confocal laser scanning microscopy (CLSM). Elements of somatic, visceral, and somato-visceral musculature have been detected. In both investigated species, the main retractors of different strength are located in the mastax area: anterior dorsal and ventral retractors in P. quadricornis, and medial and ventro-lateral ones in B. diversicornis. The posterior dorsal retractors lie at the level of the base of the foot. No noticeable difference between the two species in position and strength of mastax muscles has been detected. A longitudinal dorsal muscle of the wall of the malleate mastax has been described for the first time. All the differences detected in the position and strength of the corresponding muscular elements seem to be connected with the degree of flatness of the lorica, with the shape and size of the body, and with the structure and position of the foot.

Key words

rotifers, musculature, phalloidin labelling

Submitted June 20, 2012 · Accepted October 30, 2012 · Published December 25, 2012

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