What is "cotylelobium"

Cotylelobium is a genus of plant in family Dipterocarpaceae. The name Cotylelobium is derived from Greek (kotyle = a small cup and lobos = a pod) and describes the receptacle. It contains five species distributed in Sri Lanka, Peninsular Thailand, Sumatra, Peninsular Malaysia and Borneo. All five species are listed on the IUCN redlist, as either vulnerable, endangered or critically endangered.