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Post by timmsyrj on Feb 10, 2011 12:58:51 GMT -8
Top 2 are rather dark yellow ABBs, from the same locality as the bottom specimens. Rich  |
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Post by panzerman on Feb 10, 2011 15:31:38 GMT -8
Amazing, never seen horribilis like that ever! Another item on my shopping list!
:)John
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jaume
Full Member
Posts: 210
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Post by jaume on Feb 10, 2011 23:51:14 GMT -8
fantastic specimens. Completely different colour!
JAUME
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Post by africaone on Feb 11, 2011 0:06:56 GMT -8
there is a big discussion between collectors to know if it is a "natural" aberration? This kind of decoloration if found in many species (yellow or green). Most of them have been accepted as a decoloration due to artefact (probably humidity), some others are said to be "wild catching". I don't know any from breeding. Personally I have caught two (in 30 years collecting, one hesperus and a demodocus) that were very very old specimens, completly destroyed and that I consider as to be not natural. I seen a collection of Papilionidae with a big % of specimens concerned (quite nearly all species known in the region) and I suspect that the entire lot was subject of a postmortem decoloration. any reliable information about this kind of aberation is welcome ! The doubt is "is that aberation natural/ genetic ?" or "is this due to external cause such as moisture or sun or age or ...? " Thierry Please don't tell such things as "my local collector told me it is natural and I am sure he is reliable"  |
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Post by timmsyrj on Feb 11, 2011 0:53:37 GMT -8
I've not seen any reported colour forms of Horrabilis but these turned up a couple of years ago (all 4 off ebay) along with a load of other Ivory Coast Papilionidae (Cypraefilia, Sosia etc)
The top specimen was completely smashed (Body in 3 pieces, all 4 wings detached and 4 pieces of antennae) i can't say for sure if they were chemically colour changed when collected or shortly afterwards, certainly haven't been by myself, but i can't see the point, i only paid about £20 for all 4, surely if you are going to that kind of trouble to create an ABB or Colour form you'd make a bit more money out of it.
I have a colour form/ ABB of Papilio Bromius that i'll get a photo uploaded of shortly.
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Post by nomihoudai on Feb 11, 2011 2:30:53 GMT -8
@ Thierry I have seen Formol to cause such effects, I was just about to say that I could produce panzerman as many of these abberrations as he likes.
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Post by bobw on Feb 11, 2011 3:07:00 GMT -8
This came up once before in the P. euchenor topic. As I said there, museums are full of these discoloured specimens; it seems that several (but not all) very old specimens develop this darker, unnatural colour, and it particularly happens with yellow. I assume it's the result of some chemical reaction but to what I don't know.
I'm not saying it can't happen naturally, but I've never heard of a living specimen go such a colour and it certainly happens a lot with old specimens.
Bob
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Post by timmsyrj on Feb 11, 2011 3:23:42 GMT -8
These are May 2007, not what i would call old, even for long lived specimens they usually fade not darken up. If kept in sun light may be there would be a darkening but it's usually the reverse.
Rich
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Post by africaone on Feb 11, 2011 4:28:04 GMT -8
I seems to be multicausal
- chemical for museum specimens or specimens sent in close box full of chemical
-moisture for fresh one that are nor dried properly before being sent in compact box.
What may be interesting is to find a proove that it can happens genitically !
Thierry
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