Unknown specie and genera. Could be Epiperipatus spp, even a new specie. In analysis.
The biggest specie described in the World , publish in 2010.
Paper: http://www.scielo.sa.cr/pdf/rbt/v58n4/a06v58n4.pdf
This observation was made with Brian Kubicki, Federico Granados, Cristian Herrera and Allan Solano.