Eris militaris | |
---|---|
Male | |
Female | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Subphylum: | Chelicerata |
Class: | Arachnida |
Order: | Araneae |
Infraorder: | Araneomorphae |
Family: | Salticidae |
Subfamily: | Salticinae |
Genus: | Eris |
Species: | E. militaris |
Binomial name | |
Eris militaris (Hentz, 1845) | |
Eris militaris, known commonly as the bronze jumper or bronze lake jumper, is a species of jumping spider, belonging to the Salticidae family. [1] It is found in the United States and Canada within both suburban and rural areas. [1] [2] [3] [4] [5] The male and female of this species can be differentiated from their size or by the coloration on their cephalothorax and abdomen. The females have a lighter cephalothorax a slightly darker abdomen with white spots. [1] They are active in the autumn and winter season and can be found in sheltered areas within vegetation. [1] [6] They can also be found living within apple orchards, where insecticides may be present, which can potentially effect or alter their personality and behavior. [7] [8] [9] Their diet consists of small insects, almost anything they can hold. [7] [10]
The cephalothorax is one physical characteristic that shows differences between the male and females appearances. The female's cephalothorax are lighter in color compared to the male's, with a darker cephalothorax. The females abdomen are a bit darker with multiple white spots located dorsally. Males have a lighter abdomen and a darker cephalothorax, each with white bands along the sides. These white bands are absent on the females cephalothorax but present on their abdomen. On the males, the fang-like features, known as chelicerae, are long and located at the front of their cephalothorax. [1]
The length of males ranges from 4.7 to 6.7 millimeters, while the females can span from 6 to 8 millimeters in length. [1]
From the autumn to winter season, they can be found together in groups and beneath surfaces, such as dead wood. In locations like this, they are easily camouflaged due to their bronze, tan, brown coloration. [1]
After consuming prey, they groom themselves. Often grooming their chelicerae and rubbing them on their pedipalps. Grooming also appears during periods of rest, such as in a hidden spot within vegetation or within its shelter. [6]
Male Eris militaris participate in a dance in an attempt to win over a potential mate. This dance consists of the male lifting its forelegs outward and occasionally stepping side to side while its forelegs move consistently. [6]
Eris militaris can be found within the United States and Canada. They're commonly found in autumn walking inside or outside of buildings. [1] They can be found in hidden areas, such as blackberry bushes, where the leaves overlap and create small shelters. [6]
Jumping spider diets consist of small insects such as grasshoppers, moths, flies, or other spiders. They can eat almost anything that their chelicerae can hold. Other prey includes fruit flies, bees, wasps, crickets, worms, butterflies, or leafhoppers. [6] [7] [10]
Similar to how humans personalities can shift due to chemicals, spiders personalities can too. A hazardous but not quite lethal amount of a leftover insecticide, such as in apple orchards, can change individual spiders' personalities and alter behavior once exposed. Insecticide effects on behavior include spatial memory decreasing and their learning abilities decreasing. A reason for insecticides affecting bronze jumper behavior may be due to less food in locations with insecticide exposure. Despite its negative effects on some species, insecticides are still commonly used in agriculture. [7] [8]
Drugs and insecticides show similarities, with both attacking the nervous system and having the ability to change behavior or lead to death when ingested in lethal amounts. The same way drugs do, common insecticides can affect web building. [8] [9] Males and females of this species respond differently when exposed to insecticides. Males can be seen to be more affected when searching around their environment but still able to capture their prey. Females strength in the ability to capture prey decreases. [7] [8]
Bronze jumpers, and other spiders, play important roles for regulation of pests in these agricultural locations. With insecticides in these areas, their ability to catch prey is affected, thereby affecting pest regulation in ecosystems. [7] [8]
Phidippus audax, the Bold jumper or Daring jumping spider, is a common species of spider belonging to the genus Phidippus, a group of jumping spiders easily identified by their large eyes and their iridescent chelicerae. Like all jumping spiders, they have excellent stereoscopic vision that aids them in stalking prey and facilitates visual communication with potential mates during courting. Bold jumping spiders are native to North America and have been introduced to Hawaii, Nicobar Islands, Azores, and the Netherlands. They are typically black with a distinct white triangle on their abdomen.
Phidippus californicus is a species of jumping spider. It is found in the southwestern United States and northern Mexico.
Myrmaplata plataleoides, also called the red weaver-ant mimicking jumper, is a jumping spider that mimics the Asian weaver ant in morphology and behaviour. This species is found in India, Sri Lanka, China and many parts of Southeast Asia.
Maevia inclemens or the dimorphic jumping spider is a relatively common and colorful jumping spider of North America. In the males there are two forms, a very rare phenomenon in zoology. These use different courting displays, and differ in appearance: the "tufted" morph has a black body and pedipalps ("palps"), three black tufts across its "head", and pale legs; and the "gray" morph has black and white stripes all over its body and legs, orange palps, and no tufts. However, each form accounts for 50% of the adult males, and they are equally successful in mating. A female of Maevia inclemens is 6.5 to 8.0 millimetres long, while males are 4.75 to 6.50 millimetres long.
Zygoballus sexpunctatus is a species of jumping spider which occurs in the southeastern United States where it can be found in a variety of grassy habitats. Adult spiders measure between 3 and 4.5 mm in length. The cephalothorax and abdomen are bronze to black in color, with reddish brown or yellowish legs. The male has distinctive enlarged chelicerae and front femora. Like many jumping spiders, Z. sexpunctatus males exhibit ritualized courtship and agonistic behavior.
Menemerus bivittatus is a spider in the family Salticidae commonly known as the gray wall jumper. It is a pantropical species and is usually found on the walls of buildings or on tree trunks where it stalks its prey.
Mexcala torquata is a species of jumping spider in the genus Mexcala that lives in Guinea and Ivory Coast. It was first defined in 2009 by Wanda Wesołowska, one of over 500 that the arachnologist described during her career. The spider is medium-sized, with a dark brown carapace that is between 3.0 and 3.3 mm long and a brown abdomen between 3.0 and 3.7 mm long. It has long thin legs and serrated chelicerae. Similar to other species in the genus, it mimics ants and ant-like wasps, living alongside and preying upon them. The female has a distinctive fillet on the back of its abdomen, after which the species is named. However, it can be most easily distinguished from other spiders in the genus by its relatively small copulatory organs, specifically its very small epigyne, seminal ducts and embolus.
Menemerus zimbabwensis is a species of jumping spider in the genus Menemerus that lives in South Africa and Zimbabwe. The Polish arachnologist Wanda Wesołowska first described the female in 1999 and the male in 2007. The spider is large, with a cephalothorax that is between 1.9 and 3.2 millimetres long and an abdomen that is between 2.1 and 4.6 millimetres in length. The female is larger than the male. It also lacks the light stripe down the centre of its dark brown carapace and has a less distinct pattern on its abdomen. Its legs and pedipalps are yellow, while on the male they are brown. The male can be distinguished from the similar Menemerus nigli by the wide stripe on its abdomen. The female is harder to identify without looking at its copulatory organs. These are distinctive. It has characteristic large entrance bowls on its epigyne, which are larger than the insemination ducts and spermathecae combined. Its internal organs are very sclerotized.
Nigorella aethiopica is the type species of the genus Nigorella. A jumping spider that lives in Ethiopia and named in honour of the country in which it is found, it was first described in 2008 by Wanda Wesołowska and Beata Tomasiewicz. The spider is larger than others in the species with a cephalothorax that is between 4.1 and 4.8 mm long and an abdomen that is between 4.3 and 5.6 mm long. The carapace is generally brown and hairy, although the male is darker. While the male abdomen is marked by a light stripe on the topside and dots underneath, the female abdomen has a pattern of a light stripe and patches on the top and dark stripes on the bottom. As well as the larger size, there is a split at the end of the appendage on the pedipalp tibia that marks out the male, and the female has longer seminal ducts and thinner spermathecae than others in the genus.
Icius mbitaensis is a species of jumping spider in the genus Icius that lives in Kenya. It was first described in 2011 by Wanda Wesołowska. The spider lives communally in individual nests amongst other spiders and preys on insects, relying on its good eyesight to hunt diurnally. It is small, with a cephalothorax between 2.0 and 2.2 mm long and an abdomen 2.2 and 2.7 mm long. The female and male are similar in size and colouration of the carapace. The male abdomen is grey-brown with a faint pattern visible on some specimens. The female has a brown abdomen, sometimes more reddish-brown to the front, with some examples having a patch in the middle and spots to the back. The species is similar to other Icius spiders but differs in the size of the embolus and tibial apophysis of the male and the epigynal depression and pockets, seminal ducts and spermathecae of the female.
The Fayda Jumper or Afraflacilla fayda is a species of jumping spider in the genus Afraflacilla that lives in the United Arab Emirates. The spider was first described in 2010 by Wanda Wesołowska and Antonius van Harten. The spider is small, with an cephalothorax that is typically 1.8 mm (0.07 in) and an abdomen typically 2.9 mm (0.11 in) long. The female has a distinctive design on its abdomen that includes a pattern of an indistinct light patch in the centre and two light patches to the rear on a greyish-beige background, darker to the end. In comparison, the carapace is a uniform brown with a darker brown eye field. The spider's legs are yellow, the first legs being larger and featuring stridulatory apparatus. It has distinctive copulatory organs. The female has long winding insemination ducts and large spermathecae. The male has not been described.
Tanzania mkomaziensis is a species of jumping spider in the genus Tanzania that lives in Ethiopia, Ivory Coast, Nigeria, South Africa and Tanzania. First described in 2000 by Wanda Wesołowska and Anthony Russell-Smith, it is a very small spider with a carapace between 0.7 and 1.1 mm long and an abdomen between 0.8 and 1.4 mm long. The male spider's carapace is generally yellowish-orange while the female is brown. All have a darker eye field. The spider's abdomen varies, with some being a plain dark grey, greyish or olive-grey and others, particularly those found in Ethiopia, having a dark mosaic pattern. The spider's legs are often black, but some specimen have paler legs and others have yellow legs with black rings. Its pedipalps are yellow and its spinnerets are grey. The spider has distinctive copulatory organs, particularly the short coiled embolus on the male and the sclerotized fringes on the female epigyne.
Langona tortuosa is a species of jumping spider in the genus Langona that lives in Namibia, South Africa and Zimbabwe. It was first described in 2011 by Wanda Wesołowska, based on a holotype from Caprivi. The spider is large with a cephalothorax between 2.4 and 2.8 mm long and a abdomen between 1.9 and 2.6 mm long. The female is larger than the male. It has the toothless chelicerae typical of the genus. It can be distinguished by its copulatory organs. The male has a hidden embolus that is shorter than that on the related Langona pilosa. The female has long seminal ducts.
Pseudicius matabelensis is a species of jumping spider in the genus Pseudicius that ilves in Namibia, South Africa and Zimbabwe. The spider was first defined in 2011 by Wanda Wesołowska. The spider is small, with a cephalothorax between 1.6 and 1.9 mm long and an abdomen between 1.7 and 2.3 mm long. It has a dark brown carapace and olive-brownish abdomen, the latter with an indistinct pattern of two stripes. The male has stout dark brown front legs. The species is similar to the related Pseudicius procerus but differs in its copulatory organs. The female has two pockets at the front of the epigyne and short seminal ducts leading to large receptacles. The male has a very long tibial apophysis and short embolus.
Menemerus tropicus is a species of jumping spider in the genus Menemerus that lives in Kenya and Uganda near Lake Victoria. The spider lives in large nest complexes that can stretch between trees in mangrove savannas. The species was first described in 2007 by Wanda Wesołowska, one of over 500 descriptions she has written during her lifetime. It is a small spider, with a flattened cephalothorax that is between 1.7 and 2.1 mm and a rounded abdomen between 1.7 and 2.9 mm long. The female is larger than the male and has a darker abdomen and lighter carapace. The male abdomen has a pattern that includes a brown streak and silver spots. The female has a yellowish streak, in some examples, with yellow patches. The legs are brown and yellow. The copulatory organs help distinguish the species from others in the genus. The male has a very short double embolus and very large retrolateral apophysis. The female has a narrower pocket in its epigyne, narrow insemination ducts and small spherical spermathecae.
Langelurillus minutus is a species of jumping spider in the genus Langelurillus that lives in Namibia and Zimbabwe. It was first described in 2011 by Wanda Wesołowska and Meg Cumming. The spider is small, with a cephalothorax that is between 1.8 and 2.3 mm long and an abdomen between 1.5 and 3.9 mm long. The male is noticeably smaller than the female, which is reflected in the species name. The species is generally brown, but has indistinct patches on its abdomen and orange or orange-yellow legs. The male has a very convex palpal bulb and the female an epigyne with a large pocket and compact multi-chambered receptacles.
Bacelarella gibbosa is a species of jumping spider in the genus Bacelarella that is endemic to Nigeria. The spider has a distinctive shape to the carapace that gives the species its name, which can be translated hunchback. It was first described in 2012 by Wanda Wesołowska and Glavis Edwards. The spider is medium-sized with a cephalothorax that has a length between 3.1 and 3.8 mm and an abdomen that is between 2.6 and 3.4 mm long. The female is larger than the male. It is also generally lighter in colour, the male having a darker brown carapace, clypeus and legs. The species can be distinguished from others in the species by the male's round small palpal bulb and long thin embolus and the larger pocket in the female's epigyne.
Euophrys falciger or the Drakensberg Euophrys Jumping Spider is a species of jumping spider in the genus Euophrys that is endemic to South Africa, living in KwaZulu-Natal. The species was first described in 2014 by Wanda Wesołowska, Galina Azarkina and Anthony Russell-Smith. Its name recalls the sickle-shaped embolus of the male. The spider is small, with a body that consists of an oval cephalothorax that measures between 1.1 and 1.9 mm long and a narrower abdomen that is between 1.2 and 1.8 mm long. The male is significantly larger than the female, and darker. Its carapace, the topside of the cephalothorax, is dark brown and the underside of the cephalothorax, or sternum, is black, while its abdomen is black with a pattern of light patches on top and dark underneath. In comparison, the female abdomen is greyish-brown on top and yellowish underneath, The male has generally dark brown legs, while the female's legs are greyish-yellowish. The female is similar to others in the genus, although differing in aspects of its copulatory organs. The male is easier to distinguish without close examination. For example, as well as its longer embolus, it is its smaller size that helps differentiate it from Euophrys meridionalis.
Pseudicius wesolowskae is a species of jumping spider in the genus Pseudicius that lives in Hebei, China. The spider was first described in 2001 by Mingsheng Zhu and Daxiang Song. The spider is small, with a body length that is between 3.43 and 3.78 mm. The male is larger than the female. The spider has a light brown carapace with a black eye field. The abdomen is a dark brown on the top, marked by a pattern of white spots, and grey-yellow underneath, with a pattern of yellow-white spots. The copulatory organs enable the species to be distinguished from others in the genus. The male has a long embolus and unusual tibial apophyses. The female has a cross-shaped marking towards the rear of its epigyne. The species is named after the Polish arachnologist Wanda Wesołowska.
Phintella caledoniensis is a species of jumping spider in the genus Phintella that lives in New Caledonia. First described in 2009 by Barbara Patoleta, it was named after the island where it was found. The spider is small and has a brown cephalothorax with patches, the female being generally darker, and a grey or grey-brown abdomen. The female has distinctive bean-shaped spermatheca and the male a long and thin embolus.
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