CHARACTERIZATION OF MITOTIC AND MEIOTIC CHROMOSOMES OF THE VERMETID GASTROPOD DENDROPOMA (NOVASTOA) PETRAEUM (MONTEROSATO, 1884) (MOLLUSCA,CAENOGASTROPODA)

Authors
VITTURI R PANDOLFO A COLOMBA MS DAMIANI F CHEMELLO R
Citation
R. Vitturi et al., CHARACTERIZATION OF MITOTIC AND MEIOTIC CHROMOSOMES OF THE VERMETID GASTROPOD DENDROPOMA (NOVASTOA) PETRAEUM (MONTEROSATO, 1884) (MOLLUSCA,CAENOGASTROPODA), Ophelia, 46(2), 1997, pp. 127-139
Citations number
50
Categorie Soggetti
Marine & Freshwater Biology
Journal title
Ophelia → ACNP
ISSN journal
00785326
Volume
46
Issue
2
Year of publication
1997
Pages
127 - 139
Database
ISI
SICI code
0078-5326(1997)46:2<127:COMAMC>2.0.ZU;2-E
Abstract
The vermetid gastropod Dendropoma (Novastoa) petraeum from the Northwe stern coast of Sicily was investigated karyologically. The count of sp ermatocyte bivalents at diakinesis gave the haploid number of this spe cies as n = 17. The count of mitotic chromosomes in males, females and early developing embryos gave the diploid number as 2n = 34. Irrespec tive of sex, the karyotype of D. petraeum consists of 17 homomorphic c hromosome pairs, of which 8 are metacentric, 4 subtelocentric and 5 ac rocentric. This species is characterized by the presence of two chromo somes per cell involved in nucleolus organization (NOR) and by a low a mount of constitutive heterochromatin.