Scolopendra alcyona | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Subphylum: | Myriapoda |
Class: | Chilopoda |
Order: | Scolopendromorpha |
Family: | Scolopendridae |
Genus: | Scolopendra |
Species: | S. alcyona |
Binomial name | |
Scolopendra alcyona Tsukamoto & Shimano, 2021 [3] | |
Scolopendra alcyona, the Halcyon giant centipede, [3] is a species of amphibious centipede found in the Ryukyu Archipelago of Japan and Taiwan. [4] [3] It is the third amphibious member of the genus Scolopendra discovered so far, and the largest species of centipede in Japan, as well as the first new centipede species discovered in Japan for 143 years. [5] [6] [7] [8] [9]
Scolopendra alcyona has a greenish-black to jade or turquoise coloured trunk, [10] a brownish black head, bluish-black antennae, and greenish blue ultimate legs, all other legs being yellow in the first article, greenish blue in further ones. In specimens found on Kume-jima island, the legs were wholly yellow. The forcipules and coxosternite are light brown, the sternites pale green, and the pleurons are bluish black with greenish black integument. [3]
Scolopendra alcyona is the largest species of centipede in Japan, and grows to twenty centimetres in length and two centimetres in width. [10] [8] [6] [9]
Researchers at the Tokyo Metropolitan University first heard reports of S. alcyona as an unidentified centipede attacking and feeding on freshwater prawns in the Ryukyu archipelago. [9] [11] A group of researchers led by myriapodologist Sho Tsukamoto and Associate Professor Katsuyuki Eguchi then verified the sightings, and described it as a new species, using genetic analysis to confirm the discovery. Seven specimens were collected in total. [12] [5] [13] [14] S. alcyona can also be distinguished as a new species by morphological features, such as a spur on the twentieth legs. [5] The paper describing the species was released on April 12, 2021, in Zootaxa. [5]
Scolopendra alcyona lives in forested streamside habitats in the Ryukyu archipelago and Taiwan. It hunts giant freshwater prawns. [12] [4] It can often be found under stones in nearby streams. [3]
Scolopendra alcyona is found in the Ryukyu Archipelago, specifically on Kume-jima and Okinawa-jima islands, as well as in Taiwan, although it could also be found on other Ryukyu islands, such as Tokashiki-jima, Ishigaki-jima, and Iriomote-jima.
Scolopendra alcyona is in the family Scolopendridae, specifically in the subfamily Scolopendrinae and in the tribe Scolopendrini. [15] [16] [17]
The species name comes from Greek mythology, namely the myth of Alcyone and Ceyx, who sacrilegously called each other "Zeus" and "Hera". This angered the gods, who, while he was out on a sea voyage, sunk Ceyx's ship with a thunderbolt. The God of Dreams, Morpheus, appeared to Alcyone in her sleep and informed her of her husband's fate. Struck with grief, she threw herself into the sea, but the gods pitied her and transformed her and her husband Ceyx into kingfisher (Halcyon) birds. [18] [5]
The centipede was named after Alcyone due to its legs, which are of similar colour to that of the kingfisher. [5] [6] [3]
The Japanese name for the centipede is also a reference to mythology. A local myth has it that a local ryûjin, or dragon god, had a centipede enter his ear. He was in great pain, and, after seeing a chicken eat a centipede, lived in fear of both animals. The local people then began to paint chickens on their boats and hoist centipede flags as a way to ensure safe voyage in the sea and scare off the god. [11] [9] [5] [4]
On July 1, 2021, the Japanese Ministry of the Environment granted Scolopendra alcyona, along with two newly-discovered cockroach species (the Benieriruri cockroach and the Usuobiruri cockroach), Urgent Endangered Species Designation until 2024. [6] [7] [10] The Ministry's reasoning was that the announcement of the new species attracted the attentions of collectors and enthusiasts in both Japan and other countries, and the capture and selling of the species could lead to the decline of the species. [7] [19] [5] Habitat loss is also a concern. [5]
Centipedes are predatory arthropods belonging to the class Chilopoda of the subphylum Myriapoda, an arthropod group which includes millipedes and other multi-legged animals. Centipedes are elongated segmented (metameric) creatures with one pair of legs per body segment. All centipedes are venomous and can inflict painful stings, injecting their venom through pincer-like appendages known as forcipules or toxicognaths, which are actually modified legs instead of fangs. Despite the name, no centipede has exactly 100 pairs of legs; the number of pairs of legs is an odd number that ranges from 15 pairs to 191 pairs.
The Sakishima Islands are an archipelago located at the southernmost end of the Japanese Archipelago. They are part of the Ryukyu Islands and include the Miyako Islands and the Yaeyama Islands. The islands are administered as part of Okinawa Prefecture, Japan.
The Kerama Islands are a subtropical island group 32 kilometres (20 mi) southwest of Okinawa Island in Japan.
The Japanese archipelago is an archipelago of 14,125 islands that form the country of Japan. It extends over 3,000 km (1,900 mi) from the Sea of Okhotsk in the northeast to the East China and Philippine seas in the southwest along the Pacific coast of the Eurasian continent, and consists of three island arcs from north to south: the Northeastern Japan Arc, the Southwestern Japan Arc, and the Ryukyu Island Arc. The Daitō Islands, the Izu–Bonin–Mariana Arc, the Kuril Islands, and the Nanpō Islands neighbor the archipelago.
Scolopendra heros, commonly known as the Arizona desert centipede, giant desert centipede, giant Sonoran centipede, Texas black-tailed centipede, Texas redheaded centipede, and giant redheaded centipede, is a species of North American centipede found in the Southwestern United States and Northern Mexico.
The Yaeyama Islands are an archipelago in the southwest of Okinawa Prefecture, Japan, and cover 591.46 square kilometres (228.36 sq mi). The islands are located southwest of the Miyako Islands, part of the Ryukyu Islands archipelago. The Yaeyama Islands are the remotest part of Japan from the main islands and contain Japan's most southern (Hateruma) and most western (Yonaguni) inhabited islands. The city of Ishigaki serves as the political, cultural, and economic center of the Yaeyama Islands. On maps dating to the 1700s, the Yaeyama Group of Islands appears as the "Majico Sima Group", "Nambu-soto Islands", "Nambu Soto", and the "Taipin Islands".
The Ryukyu Islands, also known as the Nansei Islands or the Ryukyu Arc, are a chain of Japanese islands that stretch southwest from Kyushu to Taiwan: the Ōsumi, Tokara, Amami, Okinawa, and Sakishima Islands, with Yonaguni the westernmost. The larger are mostly volcanic islands and the smaller mostly coral. The largest is Okinawa Island.
Scolopendridae is a family of large centipedes.
Scolopendra is a species-rich genus of large tropical centipedes of the family Scolopendridae.
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The Scolopendromorpha, also known as tropical centipedes and bark centipedes, are an order of centipedes whose members are epimorphic and usually possess 21 or 23 trunk segments with the same number of paired legs. The number of leg pairs is fixed at 21 for most species in this order and fixed at 23 for the remaining species, except for two species with intraspecific variation: Scolopendropsis bahiensis, which has 21 or 23 leg pairs, and S. duplicata, which has 39 or 43 leg pairs. Species in this order have antennae with 17 or more segments. The order comprises the five families Cryptopidae, Scolopendridae, Mimopidae, Scolopocryptopidae, and Plutoniumidae. Nearly all species in the family Scolopendridae have four ocelli on each side of the head, and the genus Mimops features a pale area often considered an ocellus on each side of the head, whereas the other three families are blind. Species in the family Scolopocryptopidae have 23 leg-bearing segments, whereas species in all other families in this order have only 21 leg-bearing segments. The only 3 known amphibious centipedes, Scolopendra cataracta, Scolopendra paradoxa and Scolopendra alcyona belong to this order.
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