Asymmetry and variation in Keratella tropica
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, more
|  |
| Keywords |
Biology > Organism morphology
Biopolymorphism > Cyclomorphosis
Variations
Calanoida [WoRMS]; Chiridota rotifera (Pourtalès, 1851) [WoRMS]; Keratella tropica (Apstein, 1907) [WoRMS]
Fresh water |
| Abstract |
Keratella tropica usually has two posterior spines. Both may vary in length, but the left is always shorter than the right. Sometimes the left spine is absent. Spine length varies with the length of the lorica, but there are other, external, influences. Three separate lines of evidence indicate that factors which promote spine lengthare related in some way to the presence of calanoid copepods. |
|
