Geslachtengroep

Geslachtengroep is a Dutch term that translates to "genus group" in English. In biological classification, it refers to a taxonomic rank that is used to group together related genera. This grouping is typically done when there are several genera within a larger family that share distinct common characteristics, but are not considered sufficiently similar to be placed within a single genus. The concept of a geslachtengroep is employed when a finer level of organization is needed below the family rank but above the genus rank.

The establishment of a geslachtengroep is usually based on a combination of morphological, genetic, or behavioral similarities. It helps systematists to better understand evolutionary relationships and to organize the diversity of life into more manageable and informative units. While not a formal rank in the International Code of Zoological Nomenclature or the International Code of Nomenclature for algae, fungi, and plants, it serves as a practical tool for describing and studying patterns of evolution.

For example, within the family Canidae (dogs, wolves, foxes), one might discuss a "canine group" or "dog-like group" to encompass genera like Canis, Vulpes, and Urocyon, distinguishing them from other canid genera. The use of geslachtengroep is particularly common in certain fields of zoology and botany where the need for intermediate taxonomic levels arises frequently. It is a descriptive rather than a strictly hierarchical level of classification.