@inbook {3183, title = {Species and taxa:systematics and evolution}, booktitle = {Speciation and its consequences}, year = {1989}, pages = {60-81}, publisher = {Sinauer Associates}, organization = {Sinauer Associates}, address = {Sundaland}, keywords = {CLADISTICS, EVOLUTION, SPECIATION, species, SYSTEMATICS}, author = {Nelson, G.}, editor = {Otte, D. and Endler, J. A.} } @inbook {2186, title = {Conceptual and other problems in speciation}, booktitle = {Speciation and its consequences}, year = {1989}, pages = {625-648}, publisher = {Sinauer Associates}, organization = {Sinauer Associates}, address = {Sundaland}, keywords = {SPECIATION}, author = {Endler, J. A.}, editor = {Otte, D. and Endler, J. A.} }