On the impossibility of a monistic account of species / John Dupré
On the plurality of species: questioning the party line / David L. Hull
The general lineage concept of species and the defining properties of the species category / Kevin de Queiroz
When is a rose?: the kinds of Tetrahymena / David L. Nanney
Species as ecological mosaics / Kim Sterelney
Homeostasis, species, and higher taxa / Richard Boyd
Realism, essence, and kind: resuscitation species essentialism / Robert A. Wilson
Squaring the circle: natural kinds with historical essences / Paul E. Griffiths
The universal primacy of generic species in folkbiological taxonomy: implication for human biological, cultural, and scientific evolution / Scott Atran
Species, stuff, and patterns of causation / Frank C. Keil and Daniel C. Richadson
Species and the Linnaean hierarchy / Marc Erehefrsky
Getting rid of species? / Brent D. Misler.