Sint Maarten
Invertebrates known so far only from Sint Maarten include a planthopper Quilessa martinensis (PLAZI) and a pseudoscorpion Amblyolpium martinense (Internet Archive) (GBIF).
The island of Saint Martin is split between the Netherlands and France. Additional species endemic to the island as a whole include the Bearded Anole Anolis pogus (DCSR) (iNaturalist), the Saint Martin Thick-tailed Gecko Thecadactylus oskrobapreinorum (ResearchGate) (DCSR), the possibly extinct Saint Martin Skink Spondylurus martinae (GBIF) (p. 45 of ResearchGate pdf), a longhorn beetle Solenoptera chalumeaui (SEAG), a may beetle Phyllophaga stehlei (GBIF), a leaf mimic katydid Phoebolampta caeruleotergum (OSF) (Semantic Scholar), the copepods Leptocaris glaber (ResearchGate) and Acanthomolgus seticornis (GBIF), a marine cone snail Jaspidiconus (or Conasprella) berschaueri (ResearchGate), and the Saint Martin Rodwood Myrcia (or Calyptranthes) boldinghii (INPN) (DCSR)..
Sint Maarten is included in the Caribbean Islands biodiversity hotspot (Biodiversity Hotspots WM). A checklist of endemic species is at (DCSR). A list of endemic species for the island as a whole is at (p. 24 of edepot.wur.nl pdf) and an overview of the wildlife of Saint Martin is at (DCSR WM pdf).