Symplocos is a genus of flowering plants in the order Ericales. It contains about 300 species distributed in Asia and the Americas. Many species grow in humid tropical regions. This is sometimes considered to be the only genus in family Symplocaceae. Plants in this family are shrubs and trees with white or yellow flowers. The oldest fossils of the genus date to the lower Eocene of Europe and North America, with the genus being present in Europe as late as the Pliocene. Fossil seeds of †Symplocos granulosa are frequent in sediment rock layers of the Late Oligocene to the Late Miocene of Denmark, Germany, Austria and Poland. The fossil seeds are very similar to the seeds of the extan southern Chinese species Symplocos glandulifera and Symplocos sulcata. Fossil seeds of †Symplocos paucicostata are known from the Middle Pliocene sediment rock layers in Reuver, the Netherlands and from the Late Pliocene sediment rock layers in northern Italy. The fossil seeds are very similar to the seeds of the extant East Asian species Symplocos paniculata
Gracillariidae is an important family of insects in the order Lepidoptera and the principal family of leaf miners that includes several economic, horticultural or recently invasive pest species such as the horse-chestnut leaf miner, Cameraria ohridella.
Metriochroa latifoliella is a moth of the family Gracillariidae. It is known from the Mediterranean region.
Metriochroa argyrocelis is a moth of the family Gracillariidae. It is known from Zimbabwe.
Metriochroa carissae is a moth of the family Gracillariidae. It is known from Ethiopia.
Metriochroa inferior is a moth of the family Gracillariidae. It is known from Eritrea.
Metriochroa pergulariae is a moth of the family Gracillariidae. It is known from South Africa.
Metriochroa tylophorae is a moth of the family Gracillariidae. It is known from South Africa.
Stomphastis thraustica is a moth of the family Gracillariidae. It is known from Democratic Republic of Congo, Congo, Central African Republic, Ghana, Nigeria, Namibia, Zimbabwe, South Africa, Madagascar, Malaysia, Indonesia and India. It was recently also recorded in China, where there are over ten overlapping generations per year.
Corythoxestis sunosei is a moth of the family Gracillariidae, known from Japan (Kyūshū) and China.
Metriochroa fraxinella is a moth of the family Gracillariidae. It is known from Japan.
Metriochroa syringae is a moth of the family Gracillariidae. It is known from Hokkaido island in Japan.
Metriochroa psychotriella is a moth of the family Gracillariidae. It is known from Florida, United States.
Chrysaster ostensackenella is a moth of the family Gracillariidae. It is known from Ontario, Québec and Nova Scotia in Canada, and the United States. It has also been recorded in 2015 from China and in 2017 from Korea, and in 2022 from Central Italy.
Caloptilia zachrysa is a moth of the family Gracillariidae. It is known from China, India, Japan, Korea, Sri Lanka and Taiwan.
Guttigera schefflerella is a moth of the family Gracillariidae. It is found in Japan.
Eumetriochroa araliella is a moth of the family Gracillariidae. It is found in Mie, Nara, Fukuoka, Kagoshima prefectures, Japan.
Corythoxestis tricalysiella is a moth of the family Gracillariidae. It is found in Okinawa, Japan.
Symplocos anomala is a plant in the family Symplocaceae.
Metriochroa alboannulata is a moth of the family Gracillariidae. It is found in China (Jiangxi).
