|Genus:||† Thomasettia |
Thomasettia a genus of spiders in the family Sparassidae, with a single species, Thomasettia seychellana, first described in 1911.It has not been found since, and has been declared extinct. It was endemic to Mahe Island and Silhouette Island in the Seychelles.
A genus is a taxonomic rank used in the biological classification of living and fossil organisms, as well as viruses, in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.
Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs able to inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every habitat with the exceptions of air and sea colonization. As of November 2015, at least 45,700 spider species, and 113 families have been recorded by taxonomists. However, there has been dissension within the scientific community as to how all these families should be classified, as evidenced by the over 20 different classifications that have been proposed since 1900.
Silhouette Island lies 20 km (12 mi) northwest of Mahé in the Seychelles. It is the third largest granitic island in the Seychelles. It has an area of 20.1 km2 and has a population of 200, mostly workers on the island. The main settlement is La Passe, where Hilton Hotel is located. The name Silhouette was given after Étienne de Silhouette (1709-1767), the French minister of finances under Louis XV.
The black-naped monarch or black-naped blue flycatcher is a slim and agile passerine bird belonging to the family of monarch flycatchers found in southern and south-eastern Asia. They are sexually dimorphic, with the male having a distinctive black patch on the back of the head and a narrow black half collar ("necklace"), while the female is duller with olive brown wings and lacking the black markings on the head. They have a call that is similar to that of the Asian paradise flycatcher, and in tropical forest habitats, pairs may join mixed-species foraging flocks. Populations differ slightly in plumage colour and sizes.
Nepenthes treubiana is a tropical pitcher plant native to Western New Guinea and the island of Misool.
The Kauaʻi cave wolf spider, also known to local residents as the "blind spider", is only known to occur in a few caves in a lava flow with an area of 10.5 km2 (4.1 sq mi) in the Kōloa–Poʻipū region of Kauaʻi, Hawaiian Islands, and only six populations are known to exist. While their nearest surface-dwelling relatives have large eyes, this species has completely lost its eyes. They reach a body length around 20 mm (0.8 in), and are reddish brown and completely harmless to people. Unlike most wolf spiders, it produces only 15 to 30 eggs per clutch. The female carries the egg sac in her mouthparts until the spiderlings hatch.
Poecilotheria hanumavilasumica, also known as the Rameshwaram ornamental, or Rameshwaram parachute spider, is a critically endangered species of tarantula.
Andasta is a genus of ray spider. As of December 2015, the World Spider Catalog accepted the following species:
Andasta benoiti is a species of ray spider that is endemic to the Seychelles. It is found on the islands of Mahé, Conception, Thérèse, North, Praslin, Marianne, Felicite and Denis. It is found in coastal woodlands. It is threatened by coastal development and habitat degradation from invasive plants, especially Cinnamomum verum.
Andasta siltte is a species of ray spider that is endemic to the Seychelles. It is only known from a single specimen from Silhouette Island. It is found in woodlands at the lower edge of cloud forest. It is threatened by habitat deterioration, from invasive plants and climate change.
Argyrodella is a monotypic genus of tangle-web spider, containing only the one species, Argyrodella pusillus. It is endemic to the Seychelles; it can be found on the islands of Mahé and Silhouette. It is found in woodland habitats, where it spins orb webs or is a kleptoparasite of the red-legged golden orb-web spider. It is threatened by habitat deterioration due to invasive plants, especially Cinnamomum verum.
Ariadna ustulata is a species of tube-dwelling spider that is endemic to the Seychelles. It has not been recorded on Mahé since 1894, and appears to be restricted to Mont Dauban on Silhouette Island. Its adult population is estimated to be about 7,000 individuals. It is restricted to cloud forests, where it lives in mosses. It is threatened by habitat deterioration from invasive plants, especially Cinnamomum verum, and drying of cloud forests due to climate change.
Hispo alboclypea is a species of jumping spider. The species is endemic to Mahé Island and Silhouette Island of Seychelles.
Hispo striolata is a species of jumping spider. The species is endemic to Mahé Island, Silhouette Island and Praslin Island of Seychelles.
Hogna ingens, the Deserta Grande wolf spider, is a critically endangered spider species endemic to the Deserta Grande Island of the Madeira archipelago - specifically a remote valley, the Vale de Castanheira. Adult numbers have been estimated at less than 5,000, making it one of the rarest wolf spider species. It is also believed to be one of the largest wolf spiders on earth, with a 12 cm (4.7 in) leg span for the female, somewhat smaller for the male. Coloration is grey and black with white spots on the legs. The spider hides under rocks and crevices on this volcanic island, but its habitat is being invaded by the grass Phalaris aquatica, while the native vegetation is damaged by introduced goats and rabbits. The spider preys on smaller relatives, millipedes and other insects, and even small lizards. It is capable of delivering a painful and venomous bite to humans.
Hybosida dauban is a species of spider found on Silhouette Island in the Seychelles.
Hybosida lucida is a species of spiders found on Mahe Island in the Seychelles.
Zoma zoma is a species of ray spider that is endemic to Silhouette Island of Seychelles. It is threatened by habitat degradation from invasive plants, such as Cinnamomum verum.
Voraptus tenellus is a species of spider that is endemic to Mahe Island and Silhouette Island of Seychelles.
Seychellia lodoiceae is a species of spider in the family Telemidae. The species is endemic to Vallée de Mai Nature Reserve on Praslin Island in the Seychelles.
Stipax is a genus of spiders in the family Sparassidae, with a single species, Stipax triangulifer, first described in 1898. The description was based on a male collected in 1894. No specimens have been found since and the species has been declared extinct. It was endemic to Mahe Island in the Seychelles.
Pleorotus is a genus of spiders in the family Sparassidae, with a single species, Pleorotus braueri, first described in 1898. The description was based on a single male spider collected in 1894. No specimens have been found since and the species has been declared extinct. It was endemic to Mahe Island in the Seychelles.
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