The phrase "a single locality or" is correct and usable in written English.
It can be used when discussing a specific area or region in a broader context, often in contrast to multiple locations.
Example: "The study focused on a single locality or community to gather in-depth data on local practices."
Alternatives: "one specific area" or "a particular region".
Along with shifting court budgets to provincial authorities, a proposal to extend judicial jurisdictions beyond a single locality could dilute the influence of local officials.
The preservation of many individuals, all originating from a single locality, either as museum specimens previously collected by naturalists, or specimens retrieved by archaeologists at a single site, provides an opportunity to track changes in a population over time.
We determined whether each unique mtDNA haplotype was present among elephants at a single locality, at more than one locality within a single country, or across elephants from more than one country.
Although long considered to be a Guiana Shield endemic, the generally rare and locally distributed Blue-backed Tanager is also known from a single locality south of the Amazon and west of the Rio Madeira in Brazil, which discovery was made only recently.
Strange fossils known from a single locality from the Carboniferous and Devonian of Canada.
Most haplotypes (61%) were found only at a single locality, as 17 were shared haplotypes and 23 were singletons.
The most restricted is A. cilicicus, which is known only from a single locality in southern Turkey.
About 400 species are currently known (with more being discovered every year), and as many as 15 different species can be found at a single locality.
Clarkia species are capable of self-fertilization, which facilitates the propagation of the chromosomal mutants in different sets of individuals even within a single locality.
Euparkeria is a close relative of the archosaurs, and is known only from a single locality in the Lower Triassic of southern Africa.
