cryptogenic

Term: cryptogenic

Literally meaning: “hidden origin”

Origin: Anc Greek

κρύπτω/crypto(=hide, cover)

+γεννώ/geno(= “produce”, “give birth to”, “create”) >γένεσις/genesis(=origin)

Coined/History 

The term “cryptogenic species” coined by Jim Carlton in 1996 and it refers to those species that cannot be demonstrably classified as native or introduced in a particular region.   Carlton wrote that “species that are neither clearly native nor exotic”

Sourse

James T. Carlton “Biological Invasions and Cryptogenic Species” Ecology, 77(6) 1653-1655

Definition

1. (ecology) cryptogenic species  is one which origin is unknown

2. (medicine) cryptogenic is a disease of unknown cause such as cryptogenic stroke in which classic risk factors are usually absent.