Karstarma microphthalmus

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In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described.

Brown snake may refer to:

<span class="mw-page-title-main">Shiner (fish)</span> Index of animals with the same common name

Shiner is a common name used in North America for any of several kinds of small, usually silvery fish, in particular a number of cyprinids, but also e.g. the shiner perch.

<span class="mw-page-title-main">Chub</span> Index of animals with the same common name

Chub is a common fish name. It pertains to any one of a number of ray-finned fish in several families and general. In the UK, the term chub usually refers to the species Squalius cephalus. In addition, see sea chub.

<span class="mw-page-title-main">Taxonomic rank</span> Level in a taxonomic hierarchy

In biology, taxonomic rank is the relative or absolute level of a group of organisms in a hierarchy that reflects evolutionary relationships. Thus, the most inclusive clades have the highest ranks, whereas the least inclusive ones have the lowest ranks. Ranks can be either relative and be denoted by an indented taxonomy in which the level of indentation reflects the rank, or absolute, in which various terms, such as species, genus, family, order, class, phylum, kingdom, and domain designate rank. This page emphasizes absolute ranks and the rank-based codes require them. However, absolute ranks are not required in all nomenclatural systems for taxonomists; for instance, the PhyloCode, the code of phylogenetic nomenclature, does not require absolute ranks.