I meant externally identified (withour cutting). I was puzzled seeing
flagellum and PC are indifferent in appearence, but missing their positions.
Flagellum is the blind sac at the end of the epiphallus, while PC at the end
of penis (sorry for that).
But.....
In Pachnodidae, as i wrote, there are primarily 2 caeca. They must be seen
as two hollows, once the penis is everted. I didnt see any functionality in
that. Almost always a key-lock mechanism could be implied for copulation in
animals, also almost always 'locks' are very similar, despite the
complicated and distinctive apperance of the 'key'. So again, what about the
protuberances in snails?
----- Original Message -----
From: "aydin" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, December 14, 2006 5:58 PM
Subject: Re: Question on genital anatomy
> Ãomit,
> Unfortunately, the terminology is somewhat arbitrary. For example, what
> we've been calling the verge is also known as the penile papilla;
> likewise, bursa copulatrix is another name for the spermatheca. As you
> know, Schileyko has come up with the term "prismaconic tubercles" for the
> plain old papillae inside the penis.
>
> If there is a protuberance where the flagellum is supposed to be, then I
> would call it the flagellum. I am not sure how one can otherwise
> distinghish a flagellum from a caecum both being blind sacs.
>
> Why are you calling them "external" anyway? I don't think the epiphallus &
> the penile appendix ever leave the body.
>
> Aydin
>
>
> On Mon, 11 Dec 2006 17:57:32 +0200, umit <[log in to unmask]> wrote:
>
> >I know that this has no relation between the coming threads so far or
> could
> >get a lesser portion of interest. But..here is my problem and questions
> >directed to whom it may concern:
> >
> >There are several structures on male genital system, either internal or
> >external. External structures can be listed as penis, penial gland
> >(+accessory gland), penial appendix (corresponds to term penial
process?),
> >flagellum, caecum, epiphallus; internally verge, stimulator,
> >spermatophore.....Sometimes i can see that additional names can also be
> >applied.
> >
> >Couple of minutes ago i was looking at the genital system of Pachnodidae
> >(syn. Cerastidae), some showing a difference in having 2 penial caecum, a
> >'doubled' rather primitive character acc. to literature. Generally the
> >second caecum sits on where flagellum is, and for the family it is said
> >'flagellum absent'.
> >
> >Q1: What does caecum and flagellum, external protuberances in general,
> >stands for? Is there a general acception about their "work" and
anatomical
> >differences?
> >
> >Q2: I wonder if anyone studied the possible homological relations between
> >all above mentioned organs, in between or wtihin groups?
> >
> >Üit KEBAPÇ?
> >S?n Demirel ܮiversitesi
> >Fen-Edebiyat Fak?, Biyoloji B???PARTA
> >
>
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