Kellicottia longispina Kellicott 1879
Kellicottia longispina; specimen from (7); dorsoventral view.
Kellicottia longispina: the long spines of this plankton rotifer act as help for floating in the water. The same principle applies to the diatom Asterionella which is also visible in this image. Likewise the spines act as protection against predators like the big rotifer Asplanchna. Kellicottia is simply too bulky to be ingested by Asplanchna. (1)
Kellicottia longispina: dorsoventral view; this species has 6 anterior spines, which is in contrast to Kellicottia bostoniensis (4 anterior spines)
Kellicottia longispina, dorsal view, focus plane on the red eyespot. The arrowheads point to the lateral antennas. (3);
Kellicottia longispina; the length of the spines vary with environmental conditions. (see first image). (3)


Kellicottia longispina, specimen with amictic egg. (7)
Kellicottia longispina, specimen with resting egg. The shell is sculptured like the one from Keratella. (3)
Kellicottia longispina; recently hatched specimen with (still) curved spines. (4)
Kellicottia longispina; another specimen (28.05.2011), dorsoventral view. Focus plane on the red eyespot and the 3-lobed corona (Euchlanis-type). The body fluid is reddish similar to one from Gastropus stylifer. 2 of the 4 transversely striated (retractor) muscles are visible. (28.05.2011).(6)
Kellicottia longispina, malleate trophi of macerated specimen. Upper left:focus plane on the manubria; upper right: manubria in optical transect. Lower left: focus plane on the unci; lower right: focus plane on the rami. (7)
Location (7): water reservoir Heilenbecker Talsperre; Ennepetal, NRW, Germany
Habitat (7): plankton
Date (7): coll.:08.07.2022; img.: 08./ 09.07.2022
Location: Glörtalsperre / NRW (1);(6); Heilenbecker Talsperre (3); NSG Heiliges Meer, Großes HM (4);
Habitat: plankton (1); (2); (3); (4);(6)
Date: 06.04.2009(1); 7.4.2009 (2); 16.01.2011 (3); 21.03.2011 (7); 16.04.2011 (4); 28.05.2011 (6)
freshwater life
marine life