Freshwater Invertebrates in Central Europe: A Field Guide by György Kriska

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By György Kriska

This updated guidebook on freshwater invertebrates of the important ecu area is a richly illustrated paintings, offering a good resource of systematic details on freshwater macroinvertebrates. a variety of color pictures and extra vector image figures enable readers to spot particular species at a better taxonomic point (family). The publication is supplemented through digital fabric together with images and brief video sequences. Freshwater Invertebrates in vital Europe – A box consultant is a must have for all these attracted to the freshwater animals of relevant Europe resembling animal scientists and ecologists, in addition to scholars attending sessions on freshwater invertebrate.​

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Food is digested in a blind-ended, complex and highly branched intestine (gastrovascular cavity). Undigested material is regurgitated through the mouth. Their egg capsules of 1–4 mm enclose several eggs and they are anchored to the substratum with a thin thread. Egg capsules are orange when excluded (Fig. 37/4) then turn into dark brown or black within a few hours (Fig. 39/6). Turbellarians have an admirable ability to regenerate. Halved animals develop their missing organs within 1–2 days. Turbellarians are common in plant debris close to the bottom, among water plants or on the lower side of stones from where the delicate, vulnerable animals can be collected with a fine brush.

Dugesia gonocephala – 30 mm 4. Egg capsules of Dugesia gonocephala 38 Flatworms – Plathelminthes Dendrocoelum lacteum Planaria torva Polycelis felina Planaria torva (Fig. 41/11) is a common species of running and still waters. This animal is up to 12 mm in length. It is slightly pointed and has no projections. Both ventral and dorsal side of this animal is greyish or brown. Dendrocoelum lacteum (Figs. 13/6 and 41/8) lives close to the bottom of still and running waters both in mountains and lowlands.

G. Asplanchna species). The foot of the Cephalodella species living close to the bottom is hidden in their lorica, from which only the curved toes protrude. Not only the foot, but also the toes of the rotifers may be modified in some species. For instance, the toes of some Lecane species are considerably elongated and fused together to form a distinct organ. Several species (Bdelloidea) adhere temporarily to the substratum with the sticky end of their toes during feeding or locomotion. In addition to the foot and the projections of the lorica, the body of rotifers may possess other outgrowths.

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