471 Vezio Cottarelli (*), Maria Cristina Bruno ('') & Federica Venanzetti (■'"') RICERCHE ZOOLOGICHE DELLA NAVE OCEANOGRAFICA "MINERVA" (C.N.R.) SULLE ISOLE CIRCUMSARDE. XVIII. FIRST RECORD IN PHREATIC FRESHWATER OF HARPACTICOIDS BELONGING TO THE GENUS ARENOPONTIA (CRUSTACEA, COPEPODA) AND DESCRIPTION OF TWO NEW SPECIES. During the frequent zoological expeditions around the small circumsardinian island of the C.R.N, ship "Minerva", samples of meiobenthos from subterranean waters were collected. This work is concerned with two new species of Cylindropsyllidae belonging to the genus Arenopontia; the first species has been collected during the expedition mentioned above; the second species has been collected during researches concernig subterranean waters of Central Italy. It seemed useful to us to describe and discuss the two species together because they show interesting similarities not only in their taxonomical aspect, but also in their ecology, as it will be further explained. CYLINDROPSYLLIDAE Sars, Lang. Arenopontia (Neoleptastacus) phreatica n.sp. Material -1 male, collected in La Maddalena island (Sassari province, Sardinia), (V. Cottarelli legit, 4.6.1988) from an artesian well (73 mt. deep, 53 mt. o.s.l.) located in Casale Susini locality, along (*) Dipartimento di Scienze Ambientali, Università della Tuscia, Via C. de Lellis -01100 Viterbo (*")Dipartimento di Biologia, Università di Roma "Tor Vergata", Via O. Raimondo -00173 Roma (1) Ricerche eseguite con contributi C.N.R. e M.U.R.S.T. 60% Annali del Mus. Civ. St. Nat. "G. Doria", Voi. XC
Ricerche zoologiche della nave oceanografica 'Minerva' (C.N.R.) sulle isole circumsarde. 18. First record in phreatic freshwater of harpacticoids belonging to the genus Arenopontia (Crustacea, Copepoda) and description of two new species
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