L. Forró szerk.: Miscellanea Zoologica Hungarica 10. 1995 (Budapest, 1995)
Nesemann, H., Pöckl, M.; Wittmann, K. J.: Distribution of epigean Malacostraca in the middle and upper Danube (Hungary, Austria, Germany)
Fig. 2a-b. Dikero gr ammarus villosus, different colour variants from dorsal and lateral view, from Danube at Dunaremete Budapest, 20. 09. 1947, leg. Wiesinger; Danube at Budafok, 04. 09. 1947, leg. Dudich, E. & I. Loksa; Danube at Káposztásmegyer, 21. 09. 1947, leg. Wiesinger; Danube at Göd, 21. 05. 1934. leg. Kovács, I.; Szentendrei Duna near Leányfalu, 04. 09. 1991, leg. Ofenböck, T. & H. Nesemann; Danube at Szob, 12. 10. 1934, leg. Dudich, E.; Danube at Nagymaros, 30. 07. 1927, leg. Dudich, E. & E. Unger; Danube at Zebegény, 06. 05. 1034, leg. Dudich, E.; Danube at Dömös, 30. 07. 1927, leg. Dudich, E. & E. Unger; Danube at Visegrád, 14. 07. 1931, leg. Mödlinger, G.; Danube at Ásványráró, 11. 09. 1991; Danube at Lipót, 11. 09. 1991; Danube at Dunaremete, 13. 09. 1991; Danube downstream from Hainburg, 22. 03. 1991, 08. 09. 1991, leg. Nesemann, H. & M. Pöckl; Danube near Schönau, 13. 02. 1991; Danube at Zwentendorf, 20. 04. 1991; Danube at Linz (rkm 2132) from the shipping space of two ships and from their hulls, 2. 10. 1993, leg. K. J. Wittmann. D. villosus (Figs 1-3) is a widely distributed Ponto-Caspian gammarid species, which is very common in the lower reaches and the delta of the Danube (Mordukhai-Boltowskoi 1969). It advances very high upstream the larger Ponto-Caspian rivers but usually not as far as D. haemobaphes (Polischtschuk 1969, Zimbalewskaja 1969). For the Hungarian Great Plain, D. villosus is well known since the beginning of systematical investigations in the Danube, where it was collected at Nagymaros by E. Unger & E. Dudich in 1926. Originally its distribution range was limited by the narrow valley of the Dunakanyar (rkm 1707) near the confluence of the river Ipoly. This species was not listed by Vornatscher (1965) and Dudich (1967) for the Austrian Danube, and was not collected during sampling for the
