Cycas micronesica

Cycas micronesica is a species of cycad found on the island of Yap in Micronesia, the Marianaislands of Guam and Rota, and The Republic of Palau.

[3] It has been implicated as a factor in Lytico-Bodig disease, a condition similar to amyotrophic lateral sclerosis (ALS), due to the presence of the neurotoxin BMAA found in its seeds.

[10] Other threats include cycad blue butterfly (Luthrodes pandava); the longhorn beetle (Acalolepta marianarum), which causes stem damage; the alien invasive snail Satsuma mercatoria, which feeds on young leaflets; and habitat loss due to the growing human population and military activities.

[14] In 2004, Rhyzobius lophanthae was introduced on Guam as a biological pest control and has lessened the population decline.

However, they were ineffective at protecting cycad seedlings from Aulacaspis yasumatsui predation, as lack of seed vigor is one of the major factors contributing to Cycas micronesica decline.

The cycad aulacaspis scale (CAS), an invasive species from Southeast Asia, poses a significant threat to Cycas micronesica, resulting in substantial plant mortality.

Longhorn beetles, especially Acalolepta marianarum, are responsible for many recent plant deaths due to stem damage.

Trunk with ringed leaf scars
Male cone and leaves infested with cycad aulacaspis scale (CAS)