Hi Alison, I see what you mean, but there are other characters to look for. Some key features for field identification of Myrmecia (that is to say, without having a microscope) are the overall colour of the head, body and abdomen, the shape and colour of the mandibles and the colour of legs. Members of the Myrmecia pilosula group generally have yellowish mandibles which are relatively short, straight and slim, and the ends to the legs (tarses) are also yellowish. In comparison, the mandibles of Myrmecia pyriformis are dark coloured, vary substantially in width along their length and are much more heavily built, and the legs are more-or-less the same colour all the way along. If it's any comfort, I have to remind myself of these characters almost every time I try to ID Myrmecia on CNM! Cheers, Jon
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