Terminology in Invertebrate Zoology
In invertebrate zoology the name femur appears in Arthropodology. The usage is not homologous with that of vertebrate anatomy; the term "femur" simply has been adopted by analogy and refers, where applicable, to the most proximal of (usually) the two longest jointed segments of the legs of the Arthropoda. The two basal segments preceding the femur are the coxa and trochanter. This convention is not followed in Carcinology but it applies in Arachnology and Entomology. In Myriapodology another segment, the prefemur, connects the trochanter and femur.
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