Taylor and Francis Group, Caryologia, 3-4(44), p. 343-347, 1991
DOI: 10.1080/00087114.1991.10797200
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Chromosome number n = 9 and 2n = 18 for Clavelina lepadiformis (Ascidiacea, Aplousobranchiata) from the Gulf of Palermo have been determined. Silver staining analysis of testicular cells reveals that within-individual variability in NOR banding patterns is present. Using the C-banding procedure, a very impressive heterochromatin amount seems to characterize the chromosome set of this species.