The brown recluse spider, Loxosceles reclusa Gertsch & Mulaik, is frequently reported in Florida as a cause of necrotic lesions in humans. For example, in the. Taxonomy - Loxosceles reclusa (Brown recluse spider) (SPECIES) Scientific name, Loxosceles reclusa Loxosceles reclusa Gertsch & Mulaik, › brown. Descriptions and articles about the Brown Recluse, The Violin Spider, scientifically known as Loxosceles reclusa in the Encyclopedia of Life. Includes Overvi.


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Juveniles are paler in all respects, loxosceles reclusa are occasional adults. Adult brown recluse spider, Loxosceles reclusa Gertsch and Mulaik, showing leg length relative to a US quarter.

The male palp length of Loxosceles reclusa is under 4 mm, considerably less than the superficially similar crevice spider. Another difference between the two species is that Loxosceles reclusa has six eyes composed of three isolated pairs dyadswhereas Kukulcania hibernalis has eight eyes all clumped together loxosceles reclusa the middle front of the carapace.

Recluse spider

Loxosceles reclusa southern house spider, Kukulcania hibernalis Hentz. The three pairs of eyes that help identify the brown recluse loxosceles reclusa, Loxosceles reclusa Gertsch and Mulaik.

The only other Florida spiders with an eye arrangement similar to Loxosceles are the spitting spiders of the genus Scytodes, but these spiders have a domed carapace, lack a violin-shaped carapace marking, and are not known to cause serious wounds in humans.


Occasionally, the huntsman spiderHeteropoda venatoria Linnaeusis misidentified as a brown recluse Edwards However, the color pattern on the carapace of this species is loxosceles reclusa, with a light median mark on a dark background, and adults of this spider are much larger than a brown recluse.

Female spitting spider, Scytodes sp. Adult male huntsman spider, Heteropoda venatoria Linnaeus. Photograph by Marie Knight.

Biology Back to Top Hite et al. In their study, they recorded the habitat of brown recluse in Arkansas found from May to December Most were found in loxosceles reclusa and outbuildings, especially in boxes and among papers, in every room from basement to attic.

Loxosceles reclusa were found in almost any place which had remained undisturbed for lengthy periods of time, such as behind pictures, beneath or behind furniture, in boxes of toys, in clothing, among stored papers, in the corrugations of cardboard boxes, and in discarded articles, such as tires, inner tubes, and assorted other junk.

Brown recluse spider

Most of the specimens found in feral conditions were under rocks, especially in bluff outcrops, with a few under bark or in logs. They definitely seemed to prefer dry conditions. Spiderlings appear to stay with their mother for three to four instars before dispersing. They feed on prey provided by the mother during this time.

Once dispersed, they may establish a home territory, where they stay through several more instars, as evidenced by the loxosceles reclusa of several successive molts. Spiders go through a total of eight loxosceles reclusa.

Irregular webbing is seen in the nest area. Prey consists of a variety of other arthropods, including rather dangerous prey like other spiders and ants. The attack consists loxosceles reclusa a sudden lunge and bite, usually on an intended prey's appendage, after which the brown recluse immediately backs away personal observation.

The venom acts rapidly to paralyze the prey, preventing any retaliation for the initial loxosceles reclusa of the recluse spider. After the prey is overcome by the venom, the brown recluse moves in to feed.

Loxosceles reclusa | spiderbytes

Relatively harmless prey, particularly mobile prey like houseflies, will be held with the initial bite and not released.

Most mating and reproduction occurs during June and July. Males move around more when hunting than the females, which tend to remain nearer to their webs. Distribution[ edit ] A large brown recluse compared loxosceles reclusa a US penny diameter 0.

In the southern states, it is native from central Texas to western Georgia and north to Kentucky. A similar study documented that various arachnids were routinely misidentified by physicians, loxosceles reclusa control operators, and other non-expert authorities, who told their patients or clients that the spider they had was a brown recluse when in fact it was not.

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