title: A biological screw in a beetle's leg.
abstract: The coxa-trochanteral joints on the legs of the weevil Trigonopterus oblongus (Pascoe) work as a biological screw-and-nut system. The apical portions of the coxae closely resemble nuts with well-defined inner threads covering 345°. The corresponding trochanters have perfectly compatible external spiral threads of 410°.
authors: ANKA-Institute for Synchrotron Radiation, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany.
authors: Thomas
authors: T
authors: van de Kamp
authors: Patrik
authors: P
authors: Vagovič
authors: Tilo
authors: T
authors: Baumbach
authors: Alexander
authors: A
authors: Riedel
mesh_terms: D000818:Animals; D005121:Extremities / Q000033:anatomy & histology / Q000502:physiology; D007091:Image Processing, Computer-Assisted; D007596:Joints / Q000033:anatomy & histology / Q000502:physiology; D009068:Movement; D009132:Muscles / Q000033:anatomy & histology / Q000502:physiology; D012399:Rotation; D048889:Weevils / Q000033:anatomy & histology* / Q000502:physiology*