Phally status and size in Niger populations of Bulinus truncatus (Gastropoda: Planorbidae)
نویسندگان
چکیده
منابع مشابه
The genetical and environmental determination of phally polymorphism in the freshwater snail Bulinus truncatus.
In some species of self-fertile pulmonate snails, two sexual morphs co-occur in natural populations: regular individuals and aphallic individuals that cannot transmit sperm to other snails. Purely aphallic populations therefore reproduce obligatorily by selfing. Understanding the evolution of aphally and selfing in these snails requires a precise knowledge of phally determination. In this paper...
متن کاملMicrosatellites and the genetics of highly selfing populations in the freshwater snail Bulinus truncatus.
Hermaphrodite tropical freshwater snails provide a good opportunity to study the effects of mating system and genetic drift on population genetic structure because they are self-fertile and they occupy transient patchily distributed habitats (ponds). Up to now the lack of detectable allozyme polymorphism prevented any intrapopulation studies. In this paper, we examine the consequences of selfin...
متن کاملMicrosatellite size homoplasy, SSCP, and population structure: a case study in the freshwater snail Bulinus truncatus.
The extent of microsatellite size homoplasy, as well as its effect on several population genetics statistics, was investigated in natural populations using the single-strand conformation polymorphism (SSCP) method. The analysis was conducted using 240 individuals from 13 populations of the freshwater snail Bulinus truncatus at a GT(n)CT(m) compound microsatellite locus. We showed that SSCP can ...
متن کاملPlesiophysa dolichomastix sp. n. (Gastropoda: Planorbidae).
A new species of planorbid mollusc, Plesiophysa dolichomastix (Greek dolichos = long, mastix = flagellum), collected from Lagoa da Pedra, municipality of Santa Rosa, state of Goiás, Brazil (15 degrees 01'S, 47 degrees 13'W) is described. It is indistinguishable by the shell characters from the five congeneric species described so far: P. striata (Orbigny, 1841), P. granulata ("Shuttleworth" Sow...
متن کاملBiomphalaria subprona (Martens, 1899) (Gastropoda: Planorbidae)
This planorbid snail was described by Martens (1899 : 396-397) as follows: 19. Planorbis subpronus, sp.n. (Tab. XXI.fig. 15.) Testa subinflata, solidula, confertim striatula, obscure cornea, latere dextro profunde, sinistro mediocriter spiratim excavato, utraque excavatione subangulatim cincta, peripheria rotundata; anfr. 31⁄2, celeriter crescentes, ultimus prope aperturam sensim descendens; ap...
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ژورنال
عنوان ژورنال: Journal of Molluscan Studies
سال: 1997
ISSN: 0260-1230,1464-3766
DOI: 10.1093/mollus/63.1.111