Matrona japonica

Appearance

The male's body color is blue-green to green with a strong metallic luster, while the female's body is copper-colored. Males have a yellow patch at the end of their abdomen. Even so, in males, the wing membranes and the main vertical wing veins are purplish-indigo, giving the entire body a purplish-indigo color, and when it matures, the horizontal wing veins and the vertical veins in between are bluish-white from the middle to the base, so when you see them opening and closing their wings in the sun, or in flight, the part near the base appears to sparkle in a golden-blue color.

The length of the abdomen is 48-55 mm in males and 44-53 mm in females, and the length of the hindwings is 35-41 mm in males and 38-45 mm in females. The larva is an elongated dragonfly, reaching a body length of 23-26 mm, with three caudal gills at the tip of the tail, and the lateral caudal gills are 14-17 mm long.

Range and habitat

It is a dragonfly distributed in the Central Ryukyus, similar to the dragonfly. Features This dragonfly has a long, slender body with a metallic luster and black wings, and from a distance it looks similar to the common dragonfly found in mainland Japan. Variation is known between the populations of Amami Oshima and Tokunoshima and the population of Okinawa's main island, with the area of ​​the blue glowing part on the male's wings being about two-thirds of the area on the front and one-third on the back, while in the latter it is about one-half on both the front and back.

Body color ranges from greenish light brown to dark brown. Distribution It is an endemic species of the Ryukyu Islands (Central Ryukyus), and is distributed on Amami Oshima (among them Kakeroma Island, Uke Island, and Yoro Island), Tokunoshima, and the main island of Okinawa. On the main island of Okinawa, it is found in the northern mountainous region, the so-called Yanbaru region.

GBIF currently lists 892 occurrence points. Those points follow where people logged the taxon — museum drawers and surveys included — not a closed range boundary.

Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.

Life history

Life history follows the order: complete metamorphosis in moths and beetles, nymphs in grasshoppers and bugs. This page does not invent a host plant that no source named.

In crisis

Matrona japonica is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.

Sources

Written for this catalog from the Japanese Wikipedia article on リュウキュウハグロトンボ, translated and retold in English, plus Wikidata item Q81850353 and GBIF occurrence geography. Family and order context is original field-guide writing about the group. Wikipedia text is CC BY-SA. Not an IUCN assessment. Confirm status and range on iucnredlist.org.