. Bulletin of the British Museum (Natural History). THE PACHYCEPHALA PECTORALIS SUPERSPECIES 169 others by characters which are not merely striking but stable and systematically important (as is shown by their co-variation). At first sight they seem to be indepen- dently derived from more standard forms, rather than closely related to one another. There is little in common, for example, between P. schlegelii and the Fijian group D (Text-figs. 3 and 2, bottom). Yet there are important resemblances between members of this assemblage of forms. Most striking is the similarity between females of P.
. Bulletin of the British Museum (Natural History). THE PACHYCEPHALA PECTORALIS SUPERSPECIES 169 others by characters which are not merely striking but stable and systematically important (as is shown by their co-variation). At first sight they seem to be indepen- dently derived from more standard forms, rather than closely related to one another. There is little in common, for example, between P. schlegelii and the Fijian group D (Text-figs. 3 and 2, bottom). Yet there are important resemblances between members of this assemblage of forms. Most striking is the similarity between females of P. schlegelii and of Fig. 4.—Diagram of the phylogeny suggested for the superspecies, showing secondary intergradation between subspecies-groups of P. pectoralis (dotted) and sympatric co-existence in New Guinea (arrows).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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Keywords: ., 1957, boo, bookauthorbritishmuseumnaturalhistory, bookcentury1900
