a species of fish hitherto unknown in the Westhithertohith‧er‧to /ˌhɪðəˈtuː◂ $ -ər-/ ●○○ adverb formal 
a species of fish hitherto unknown in the West
EXAMPLES FROM OTHER DICTIONARIES
- French astronomers have found a hitherto unknown galaxy.
- A fourth gallery hitherto not previously in these columns is Gisela Capitain, at Apostelnstrasse 19.
- In order to ingratiate himself with the populace, he rebuilt the Temple of Jerusalem on a hitherto unprecedented scale.
- Isabel trembled, half afraid, half shocked, at such shameless, hitherto unknown longings.
- It is received with fear; for it threatens that comforting security and certainty which hitherto have shaped our actions.
- They have hitherto been the most generally used in clinical trials.
COLLOCATIONS FROM THE ENTRY a species of fish hitherto unknown in the WestCOLLOCATIONS FROM THE CORPUSADJECTIVE
up to this time: a species of fish hitherto unknown in the West· This has uncovered some interesting findings - for instance the hitherto unknown demand for 3.3V chips from desktop system designers.· We are amid corruption of a hitherto unknown scale but not without some precedent.· But Brindley's canal from the coal-mines at Worsley to Manchester had several features hitherto unknown.· Isabel trembled, half afraid, half shocked, at such shameless, hitherto unknown longings.· It now remains to ask whether there is any significance in this hitherto unknown fact.· No details are given of this hitherto unknown organisation, but the platform put forward by the paper looks like pure Thatcherism.· Recently a hitherto unknown phenomenon has appeared in Illela: property speculation.· This meant seeking out even more diverse wines from hitherto unknown sources, which further taxed the new-found art of blending.
a species of fish hitherto unknown in the West