Tertius Testiculus

Tertius Testiculus was a Tenuvian scholar, whose linguistic and anthropological studies of the indigenes are considered seminal works in the fields of phrenology and hierarchal racial stratification, Londrian translations of which are located at Bembridge Academy.
=== De origine et linguis indigenorum ===
Dē orīgine et linguīs indigenōrum (On the Origin and Languages of the Indigenes) is the most comprehensive work in indigene anthropology and comparative linguistics. In it, Testiculus lays out the groundwork for several hypotheses which have since become accepted science. In the chapter Monogenesis ūrēthrālis, he provides lexical proof of a common origin between the Nigyar and Shtonar languages, which he dubs the Urethral Languages, placing their Urheimat at the Urethral Mountains, a hypothesis upon which he then pioneered the field of historical linguistics by constructing a basic proto-language which he called Proto-Urethral.
Later in the work, he examines archeological remains from sacred indigene burial sites which were dug up to make room for public toilets, and discovered that the remains were not indigene after all, but of a primitive homonid (taxonomically labeled niganthropus) which, as he determined through the shape of their skulls, did not have fully developed speech centers.
Testiculus posits that these sub-human creatures did not have language, but rather could only articulate the syllable nig in various grunts and squeals — he asks the reader to envision a bunch of little tree apes muttering nig nig nig nig nig as they climb. The proof of this is in that this creature must have interbred with the modern-day indigenes, whose languages all show an inordinate tendency towards that syllable (or variants of it), indicating a genetic legacy of these tree apes which has shaped their language centers. See the ethnonyms Nigyar and Nyiqqa, or the toponyms Nigmag-Nog and Nyiggörföld for examples.
This, alongside the prevalent rates of Downs' Syndrome among the Indigenes, has served as the moral justification for their displacement and extermination.
=== Behind the Scenes ===
The name niganthropus derives from the historical genus meganthropus.