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Post by collector on Jan 11, 2011 20:31:11 GMT -8
Please help ID these two preponas from venzuela.
Thanks
Bedros
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Post by bobw on Jan 11, 2011 23:16:05 GMT -8
Although the ventral surface is the more important for identification we do need to see the uppersides as well. However, first impressions are: 1. Prepona laertes, 2. Archaeoprepona demophon.
Bob
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Post by collector on Jan 12, 2011 9:03:35 GMT -8
Good point. Here is a picture with the uppersides. Thanks Bedros Attachments:
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Post by bobw on Jan 12, 2011 12:19:55 GMT -8
The second one is definitely Archaeoprepona demophon muson.
The first is probably Prepona laertes, although there is a species complex here which still needs some sorting out and it could be P. omphale/amesia. Subspecies in this group are even more difficult. Females are much more difficult to be sure about which makes this one harder.
Bob
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Post by collector on Jan 24, 2011 20:56:05 GMT -8
Thanks Bob
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Post by lepidofrance on Jan 26, 2011 3:05:43 GMT -8
Following the Xavier Choimet's paper on genus Prepona ( Lépidoptères de Guyane, tome 3, Lépidoptéristes de France publisher, 2008), the first sample is : Prepona philipponi Le Moult, 1932. " au revers des postérieures, la jonction entre la zone claire et la zone foncée est rectiligne. La ligne médiane est droite dans les espaces 4, 5, 6 et située au niveau de cette jonction entre zones claire et foncée, parfois même en zone sombre distale. Cette ligne est dans l'espace 4, à l'ouverture de la cellule, légèrement convexe distalement." (page 16 and plate page 19). www.lepido-france.fr/monographies/lepidopteres-de-guyane-volume-3/Hoping it would help ! |
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Post by bobw on Jan 26, 2011 4:08:11 GMT -8
Following the Xavier Choimet's paper on genus Prepona ( Lépidoptères de Guyane, tome 3, Lépidoptéristes de France publisher, 2008), the first sample is : Prepona philipponi Le Moult, 1932. " au revers des postérieures, la jonction entre la zone claire et la zone foncée est rectiligne. La ligne médiane est droite dans les espaces 4, 5, 6 et située au niveau de cette jonction entre zones claire et foncée, parfois même en zone sombre distale. Cette ligne est dans l'espace 4, à l'ouverture de la cellule, légèrement convexe distalement." The specimen is almost definitely not philipponi, you must have misread the decription. Choimet took his analysis of the laertes group from Andrew Nield's "Butterflies of Venezuela". I have discussed this group at length with Andrew, and formed some of my own opinions but it still needs a lot of work. The four most striking characteristics of philipponi are i) the blue-purple flush on the male forewing upperside, ii) the reddish-brown androconial tufts in the male (as this specimen is a female these don't help here), iii) the unicolorous forewing underside, iv) the narrow straight median black line on the hindwing underside, in particular this is straight or even convex in space 4, in related species it is concave or frequently a sharp inward-pointing "V". This specimen has a variegated forewing underside and a sharp inward "V" in space 4 so is almost certainly not philipponi. It doesn't have the look of pseudomphale so is probably laertes or omphale/ amesia (there is dispute as to the correct name), these are extremely difficult to separate. Bob |
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