@Article{biocell.2004.28.279,
AUTHOR = {MARÍA ESTHER DIUPOTEX-CHONG, NÉSTOR J. CAZZANIGA, ALEJANDRA HERNÁNDEZ-SANTOYO, JOSÉ MIGUEL BETANCOURT-RULE},
TITLE = {Karyotype description of <i>Pomacea patula catemacensis</i> (Caenogastropoda, Ampullariidae), with an assessment of the taxonomic status of <i>Pomacea patula</i>},
JOURNAL = {BIOCELL},
VOLUME = {28},
YEAR = {2004},
NUMBER = {3},
PAGES = {279--285},
URL = {http://www.techscience.com/biocell/v28n3/37653},
ISSN = {1667-5746},
ABSTRACT = {Mitotic chromosomes of the freshwater snail <i>Pomacea patula catemacensis</i> (Baker 1922) were analyzed on gill tissue of specimens from the type locality (Lake Catemaco, Mexico). The diploid number of chromosomes is 2n = 26, including nine metacentric and four submetacentric pairs; therefore, the fundamental number is FN = 52. No sex chromosomes could be identified. The same chromosome number and morphology were already reported for <i>P. flagellata</i>, i.e., the other species of the genus living in Mexico. The basic haploid number for family Ampullariidae was reported to be n° =°14 in the literature; so, its reduction to n° =°13 is probably an apomorphy of the Mexican <i>Pomacea</i> snails. <i>Lanistes bolteni,</i> from Egypt, also shows n°=°13, but its karyotype is much more asymmetrical, and seems to have evolved independently from <i>P. flagellata</i> and <i>P. patula catemacensis</i>. The nominotypical subspecies, <i>P. patula patula</i> (Reeve 1856), is a poorly known taxon, whose original locality is unknown. A taxonomical account is presented here, and a Mexican origin postulated as the most parsimonious hypothesis.},
DOI = {10.32604/biocell.2004.28.279}
}