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S. Utevsky and J. Sorbe

First Record of the Boreal-Arctic Marine Leech Mysidobdella Borealis (Hirudinida, Piscicolidae) from the Southern Bay of Biscay

Four individuals of the marine fish leech Mysidobdella borealis (Johansson, 1898) were sampled from the mysids Schistomysis parkeri Norman, 1892 from the swash zone of Hendaye beach, France. This is the only known so far boreal-arctic piscicolid species occurring from the southern Bay of Biscay to the Kara Sea.

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A. Öktener and S. Utevsky

New Information on the Hosts and Distribution of the Marine Fish Leeches Trachelobdella Lubrica and Pontobdella Muricata (Clitellata, Hirudinida)

Fish leeches collected in the Aegean Sea, the Sea of Marmara and the Black Sea were examined. Trachelobdella lubrica (Grube, 1840) was recorded for the first time from the ballan wrasse Labrus bergylta (Osteichthyes, Labridae), marine bream Diplodus vulgaris (Osteichthyes, Sparidae) and the grouper Epinephelus aeneus (Osteichthyes, Serranidae) from aquiculture. The leeches of this species were found in the Aegean Sea and the Sea of Marmara on the body surface, in the mouth and gill cavities of their hosts. Leeches identified as Pontobdella muricata (Linnaeus, 1758) were collected from the thornback ray Raja clavata (Chondrichthyes, Rajidae) in the Black Sea.

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M. V. Kovalenko and S. Yu. Utevsky

Abstract

The aim of this research was to test the ability of hybridizing Hirudo orientalis S. Utevsky et Trontelj, 2005 and Hirudo verbana Carena, 1820. We obtained offspring from both species. The color pattern of all the hybrids was uniform and quite different from both the parents. The venter was similar to H. verbana. The dorsum was very similar to the color pattern of Hirudo medicinalis Linnaeus, 1758 that was not involved to the experiment. The coloration pattern of the hybrids, which is very similar to that of H. medicinalis suggests the hybrid origin of this species.

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I. A. Kaygorodova and S. Yu. Utevsky

The First Record of Helobdella nuda (Hirudinida, Glossiphoniidae) in Lake Baikal. Kaygorodova I. A., Utevsky S. Yu. - By far, the leech species Helobdella nuda (Moore, 1924) was known from China and the Amur River basin. It is found to occur in shallow waters of Lake Baikal.