Eratigena Duellica

	Eratigena Duellica ''Eratigena duellica'', the giant house spider, is a species of funnel weaver in the spider family Agelenidae. It is found in Canada, the United States, and Europe. The related species ''Eratigena atrica'' is also called the giant house spider The giant house spider has been treated as either one species, under the name ''Eratigena atrica'', or as three species, ''E. atrica'', '' E. duellica'' and '' E. saeva''. , the three species view was accepted by the World Spider Catalog. T .... ''Eratigena atrica'' was transferred from the genus ''Tegenaria'' in 2013. It was considered the same species as '' Eratigena atrica'' until 2018, when ''Eratigena duellica'', '' Eratigena saeva'', and ''Eratigena atrica'' were restored as separate species. References Agelenidae Spiders described in 1875 {{agelenidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Spider Spiders ( order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. 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 land habitat. , 50,356 spider species in 132 families have been recorded by taxonomists. However, there has been debate among scientists about how families should be classified, with over 20 different classifications proposed since 1900. Anatomically, spiders (as with all arachnids) differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel, however, as there is currently neither paleontological nor embryological evidence that spiders ever had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Agelenidae The Agelenidae are a large family of spiders in the suborder Araneomorphae. Well-known examples include the common "grass spiders" of the genus ''Agelenopsis''. Nearly all Agelenidae are harmless to humans, but the bite of the hobo spider (''Eratigena agrestis'') may be medically significant, and some evidence suggests it might cause necrotic lesions, but the matter remains subject to debate. The most widely accepted common name for members of the family is funnel weaver. Description The body length of the smallest Agelenidae spiders are about , excluding the legs, while the larger species grow to long. Some exceptionally large species, such as ''Eratigena atrica'', may reach in total leg span. Agelenids have eight eyes in two horizontal rows of four. Their cephalothorax, cephalothoraces narrow somewhat towards the front where the eyes are. Their abdomens are more or less oval, usually patterned with two rows of lines and spots. Some species have longitudinal lines on the dorsa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Giant House Spider The giant house spider has been treated as either one species, under the name ''Eratigena atrica'', or as three species, ''E. atrica'', '' E. duellica'' and '' E. saeva''. , the three species view was accepted by the World Spider Catalog. They are among the largest spiders of Central and Northern Europe. They were previously placed in the genus ''Tegenaria''. In 2013, they were moved to the new genus ''Eratigena'' as the single species ''Eratigena atrica''. In 2018, the three separate species were restored. The bite of these species does not pose a threat to humans or pets, and they are generally reluctant to bite, preferring instead to hide or escape. Description The two sexes do not differ in coloration or markings. Its coloration is mainly dark brown. On its sternum is a lighter marking, with three light spots on each side that form an arrow-like shape pointing toward the head of the spider. The opisthosoma features a lighter middle line with six "spots" on each side. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Eratigena Atrica The giant house spider has been treated as either one species, under the name ''Eratigena atrica'', or as three species, ''E. atrica'', '' E. duellica'' and '' E. saeva''. , the three species view was accepted by the World Spider Catalog. They are among the largest spiders of Central and Northern Europe. They were previously placed in the genus ''Tegenaria''. In 2013, they were moved to the new genus ''Eratigena'' as the single species ''Eratigena atrica''. In 2018, the three separate species were restored. The bite of these species does not pose a threat to humans or pets, and they are generally reluctant to bite, preferring instead to hide or escape. Description The two sexes do not differ in coloration or markings. Its coloration is mainly dark brown. On its sternum is a lighter marking, with three light spots on each side that form an arrow-like shape pointing toward the head of the spider. The opisthosoma features a lighter middle line with six "spots" on each side. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Eratigena Saeva ''Eratigena'' is a genus of spider in the family Agelenidae. Most of its species were moved from the genus ''Tegenaria'' in 2013. Which is what this genus is named after, being an anagram of ''Tegenaria''. Two species that frequently build webs in and around human dwellings are now placed in this genus. ''Eratigena agrestis'' is the hobo spider, native to Europe and Central Asia, introduced to North America. ''Eratigena atrica'' is the giant house spider, native to Europe and also introduced into North America. Description They are medium to large spiders. Two symmetrical dark bands are present dorsally on the carapace, which can be serrated (as pictured) or reduced, usually to three or four conspicuous triangles. They also have plumose hairs on the carapace, legs, and opisthosoma. Their rows of eyes are only slightly curved, in either direction. Taxonomy Phylogeny Species now placed in the genus ''Eratigena'' were previously placed in ''Tegenaria'' and ''Malthonica''. In 2013, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]