Abstract
Two modal diploid numbers of chromosomes were found for Pterotraches hippocampus Philippi (Mollusca: Mesogastropoda) collected from the Gulf of Palermo in 1990: 2n=31 and 32 for males and females, respectively. This, along with other karyological characteristics such as the occurrence of a trivalent configuration at diakinesis and two types of metaphase-II spreads in spermatocytes, supports the notion that a X1X2Y♂/X1X1X2X2♀ sex mechanism operates in the species investigated here. Silver nitrate procedure revealed an intraindividual variation in the Ag-staining pattern occurring in this species. The majority of the chromosome pair displayed terminal and/or interstitial heterochromatic blocks after C-banding.
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Literature cited
Bertollo, L. A. C., Yakahashi, C. S., Moreira, F. O. (1983). Multiple sex chromosome in the genus Hoplias (Pisces, Erythrinidae). Cytologia 48:1–12
Carbone, P., Vitturi, R., Catalano, E., Macaluso, M. (1987). Chromosome sex determination and Y-autosome fusion in Blennius tentacularis Brünnich 1765 (Pisces, Blennidae). J. Fish Biol. 31: 597–602
Carr, J. L., Bickham, J. W. (1981). Sex chromosomes of the asian black pond turtle, Siebenrockiella crassicollis (Testudines: Emydidae). Cytogenet. Cell Genet. 31:178–183
De Almeida Toledo, L. F., Foresti, H. De Almeida Toledo Filho, S. (1984). Complex sex chrosome system in Eigenmannia sp. (Pisces, Gymnotiformes). Genetica 64:165–179
Ewulonu, U. K., Haas, R., Turner, B. J. (1985). A multiple chromosome system in the annual killifish, Nothobranchius guentheri. Copeia 2:503–508
Garcia, E., Alvarez, M. C., Thode, G. (1987). Chromosome relationships in the genus Blennius (Blennidae, Perciformes) C-banding patterns suggest two karyo-evolutional pathways. Genetica 72:27–36
Gorman, G. C., Atkins, L., Hilzinger, T. (1967). New karyotypic data on 15 genera of lizards in the family Iguanidae with a discussion of taxonomic and cytological implications. Cytogenetics 6:286–299
Green, D. M. (1990). Muller sratchet and the evolution of super-numerary chromosomes. Genome 33:818–824
Howell, W. M., Black, D. A. (1980). Controlled silver-staining of nucleolus organizer regions with a protective colloidal developer: a 1-step method. Experientia 36:1014–1015
Hubbell, H. R. (1985) Silver staining as an indicator of active ribosomal genes. Stain Technol. 60:285–294
Hyman, L. H. (1967). The invertebrates, Mollusca I, Vol. VI, McGraw-Hill Book Company, New York
Kasahara, S., Yonenaga-Yassuda, Y., Schincariol, R. A., L'Abbate, M. (1983). Chromosome mechanisms of sex determination, G-and C-band patterns of nucleolus organizer regions in Tropidurus torquatus (Sauria, Iguanidae). Genetica 60:151–156
Lalli, C. M., Gilmer, R. W. (1989). Pelagic snails. Stanford University Press, Stanford, California
Levan, A., Fredga, K., Sandberg, A. A. (1964). Nomenclature for centromeric position of chromsomes. Hereditas 52:201–220
Mengden, G. A. (1981). Linar differentiation of the C-band pattern of the W chromosome in snakes and birds. Chromosoma 83:275–287
Patterson, C. M. (1969). Chromosomes of molluscs. In: Proc. Symp. Mollusca. (Mar. biol. Ass. India) 2:635–689
Peccinini, D., Frota-Pessoa, O., Ferrari, I. (1971). Sex determination of the pseudo-XO/XX1 type in the brazilian lizard Polychrus sp. (Sauria, Iguanidae). Caryologia 24:129–139
Pezold, F. (1984). Evidence for multiple sex chromosomes in the freshwater goby, Gobionellus shufeldti (Pisces: Gobiidae). Copeia 1984(1):235–238
Schid, M. (1980). Chromosome banding in Amphibia. V. Hightly differentiated ZW/ZZ sex chromosomes and exceptional genome size in Pyxicephalus adsperusus (Anura: Ranidae). Chromosoma 80:69–96
Schmid, M., Haaf, T., Geile, B., Sims, S. (1983). Chromosome banding in Amphibia. VIII. An unusual XY/XX sex chromosome systeme in Gastrotheca riobambae (Anura, Hylidae). Chromosomal 88:69–82
Sites, J. W., Bickman, J. W., Haiduk, M. W. (1979). Derived X chromosome in the turtle genus Staurotypus. Science, N.Y. 206: 1410–1412
Sumner, A. T. (1990). Chromosome banding. Academic Division of Unwin Human Ltd., London
Thiriot-Quievreux, C. (1990). Karyotype analysis in serveral pelagic gastropods. Am. malac. Bull. 8(1):37–44
Thiriot-Quievreux C., Ayraud, N. (1982). Les karyotypes de quelques especies de Bivalves et de Gasteropodes marins. Mar. Biol. 70:165–172
Vitturi, R., Catalano, E. (1990). Spermatocyte chromosome banding studies in Buccinulum corneum (Prosobranchia: Neogastropoda): variation in silver-NOR banding pattern. Mar. Biol. 104:259–263
Vitturi, R., Catalano, E., Macaluso, M., Zava B. (1988). The karyology of Littorina neritoides (Linnaeus 1758) (Mollusca, Prosobranchia). Malacologia 29(2):319–324
Vitturi, R., Colombera, D., Catalano, E., Amico, F. P. (1991a). Karyotype analysis, nucleolus organizer regions and C-banding pattern of Eisenia foetida (Oligochaeta, Lumbricidae). Genetica 83:159–165
Vitturi, R., Colombera, D., Catalano, E., Amico, F. P. (1991b). Spermatocyte chromosome analysis of Helicella virgata (Pulmonata: Helicidae). Silver stained and C-banded chromosomes. J. Hered. 82(4):339–343
Vitturi, R., Colombera, D., Catalano, E., Turon, X. (1992). Ag-NOR and C-banding analysis of spermatocyte chromosomes of Clavelina lepadiformis (Ascidiacea, Aplousbranchiata). Caryologia 44(3–4):343–347
White, M. J. D. (1973). Animal cytology and evolution, 3rd edn. Cambridge University Press, London
Wright, J. W. (1973). Evolution of the X1X2Y sex chromosome mechanism in the scincid lizard Scincella laterale (Say). Chromosoma 43:101–108
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Communicated by M. Sarà,, Genova
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Vitturi, R., Catalano, E., Colombera, D. et al. Multiple sex-chromosome system and other karyological characterizations of Pterotrachea hippocampus (Mollusca: Mesogastropoda). Marine Biology 115, 581–585 (1993). https://doi.org/10.1007/BF00349365
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DOI: https://doi.org/10.1007/BF00349365