Gijs,
I believe the parthenogentic part was in reference to the hybrid that is now
a species. Where I live we have Cnemidophoorus neomexicanus Lowe & Zweifel,
1952 (the New Mexican whiptail lizard). The NM whiptail is an "allodiploid
parthenogenotic" species that was originally created through hybridization
between C. inornatus (the paternal parent) and C. tigris marmoratus (the
maternal parent). C. neomexicanus is a viable species that reproduces
parthenogenitically - the females lay eggs that are always female. No males
involved. As for other hybrids sucessfully breeding, I believe this has
happened in reptiles. Sometimes these animals just don't read or understand
our textbooks (rule books) and go about life in an unexpected fashion.
There are a number of parthenogenitic reptiles, but I have yet to hear of
such in the Mollusca (a problem of observation maybe?).
Tom Eichhorst in New Mexico, USA (where it was 82 degrees F yesterday, a new
record)
> -----Original Message-----
> From: Conchologists of America List [mailto:[log in to unmask]]On
> Behalf Of Gijs C. Kronenberg
> Sent: Sunday, March 21, 2004 7:35 AM
> To: [log in to unmask]
> Subject: Re: hybrids, Lambis, population
>
>
> Dear Dr. Campbell:
>
> You wrote: "Most animals in this category are parthenogenetic". Great!
> Parthenogenetic animals do not hybridise, as only one individual is
> involved,
> Parthenogenesis therefore excludes hybridisation, as a male and a female
> individual are required.
> In plants dandelions [Taraxacum officinale] is notorious for its
> capability
> of self-fertilization, and with a "reductio in absurdum" one
> could say that
> every individual would be a species of its own.
>
> So, I am still looking for examples ..................
>
> Gijs
>
>
> ----- Original Message -----
> From: "bivalve" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, March 20, 2004 4:55 PM
> Subject: Re: hybrids, Lambis, population
>
>
> > >a large predator (Nile Bass?)<
> >
> > The Nile perch, an obvious bad idea to anyone familiar with trophic
> patterns (for fishery impact) or with the effects of introduced generalist
> predators.
> >
> > There are self-reproducing hybrid populations; these qualify as new
> species. Molluscan examples include almost all freshwater Corbicula, most
> if not all sphaerioideans, and most populations of Lasaea; probably some
> thiarids also fall under this category. They are quite common in
> plants and
> sporadic but widespread in animals (no mammal or bird examples known,
> though). Most animals in this category are parthenogenetic, though
> Corbicula has some components of sexual reproduction despite
> being triploid.
> >
> > Dr. David Campbell
> > Old Seashells
> > University of Alabama
> > Biodiversity & Systematics
> > Dept. Biological Sciences
> > Box 870345
> > Tuscaloosa, AL 35487-0345 USA
> > [log in to unmask]
> >
> > That is Uncle Joe, taken in the masonic regalia of a Grand Exalted
> Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at
> Droitgate Spa
> >
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