Karaman 1989. On two subterranean gammaridean species from Italy, Niphargus messanai, n. sp. and Ilvanella inexpectata V.T. 1972. Contribution to the knowledge of the Amphipoda 194. Acta Biologica Iugoslavica Serija G Biosystematicka, 15(1) 1989: 55-70