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First Record of the Mediterranean Recluse Spider Loxosceles rufescens (Araneae: Sicariidae) from Iran.

Zamani A, Rafinejad J - J Arthropod Borne Dis (2014)

Bottom Line: The characteristics of the genus, which are the unique arrangement of six eyes in three diads, the violin shaped mark on the cephalothorax, and the short tibia of adult male palpi with narrow base and it's embolus which is about as long as the width of the globular bulb were observed and recorded.Since there are no reports of loxoscelism from Iran, we assume that the bites are either infrequent or misdiagnosed.Therefore further studies are needed to clarify the medical importance degree of this species.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran.

ABSTRACT
Loxosceles rufescens, commonly known as the Mediterranean Recluse or Mediterranean Fiddle-Back Spider is recorded from Iran for the first time. The genus Loxosceles contains 103 accepted species, two of them (including L. rufescens) are cosmopolitan. All Loxosceles species tested so far possess necrotic venoms, which is a unique characteristic among the Order Araneae. Considering this characteristic, it is of medical importance to determine a specific geographical distribution of these spiders. Collecting methods include visual inspection and direct hand collecting. All of the specimens were collected in Tehran. Six specimens of both sexes were collected from parks, houses and apartments. The characteristics of the genus, which are the unique arrangement of six eyes in three diads, the violin shaped mark on the cephalothorax, and the short tibia of adult male palpi with narrow base and it's embolus which is about as long as the width of the globular bulb were observed and recorded. Having the cytotoxicity of the venom and its urban distribution in mind, L. rufescens is probably among the more important spider species of Iran. Since there are no reports of loxoscelism from Iran, we assume that the bites are either infrequent or misdiagnosed. Therefore further studies are needed to clarify the medical importance degree of this species.

No MeSH data available.


Related in: MedlinePlus

Tehran, Iran. The collecting site for L. rufescens
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Related In: Results  -  Collection


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Figure 1: Tehran, Iran. The collecting site for L. rufescens

Mentions: Since these spiders are ground dwelling and usually live inside apartments, under rocks and fallen tree logs, discovery of all L. rufescens specimens was a result of visual inspections and direct hand collecting between years 2010–2013. Indoor specimens were found on the walls or were captured while they were foraging on the ground. Outdoor specimens were found under large rocks and in the leaf litter. Six specimens were collected (first one: 35°45′N, 51°24′E second one: 35°43′N, 51°25′E third one: 35°43′N, 51°25′E fourth one: 35°21′N, 51°22′E fifth one: 35°34′N, 51°02′E and sixth one: 35°46′N, 51°20′E) (Fig. 1), preserved in 75 % ethanol and deposited in senior author’s personal collection. Half of the specimens were found in apartments/ houses and the rest of them were found in parks. Various stereo-microscopic photos of specimens and their structures were captured using a light stereo-microscope, plus a Sony DSC-TX10 camera. Publication of Gertsch and Ennik (1983) was used as an identification key.


First Record of the Mediterranean Recluse Spider Loxosceles rufescens (Araneae: Sicariidae) from Iran.

Zamani A, Rafinejad J - J Arthropod Borne Dis (2014)

Tehran, Iran. The collecting site for L. rufescens
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4478436&req=5

Figure 1: Tehran, Iran. The collecting site for L. rufescens
Mentions: Since these spiders are ground dwelling and usually live inside apartments, under rocks and fallen tree logs, discovery of all L. rufescens specimens was a result of visual inspections and direct hand collecting between years 2010–2013. Indoor specimens were found on the walls or were captured while they were foraging on the ground. Outdoor specimens were found under large rocks and in the leaf litter. Six specimens were collected (first one: 35°45′N, 51°24′E second one: 35°43′N, 51°25′E third one: 35°43′N, 51°25′E fourth one: 35°21′N, 51°22′E fifth one: 35°34′N, 51°02′E and sixth one: 35°46′N, 51°20′E) (Fig. 1), preserved in 75 % ethanol and deposited in senior author’s personal collection. Half of the specimens were found in apartments/ houses and the rest of them were found in parks. Various stereo-microscopic photos of specimens and their structures were captured using a light stereo-microscope, plus a Sony DSC-TX10 camera. Publication of Gertsch and Ennik (1983) was used as an identification key.

Bottom Line: The characteristics of the genus, which are the unique arrangement of six eyes in three diads, the violin shaped mark on the cephalothorax, and the short tibia of adult male palpi with narrow base and it's embolus which is about as long as the width of the globular bulb were observed and recorded.Since there are no reports of loxoscelism from Iran, we assume that the bites are either infrequent or misdiagnosed.Therefore further studies are needed to clarify the medical importance degree of this species.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran.

ABSTRACT
Loxosceles rufescens, commonly known as the Mediterranean Recluse or Mediterranean Fiddle-Back Spider is recorded from Iran for the first time. The genus Loxosceles contains 103 accepted species, two of them (including L. rufescens) are cosmopolitan. All Loxosceles species tested so far possess necrotic venoms, which is a unique characteristic among the Order Araneae. Considering this characteristic, it is of medical importance to determine a specific geographical distribution of these spiders. Collecting methods include visual inspection and direct hand collecting. All of the specimens were collected in Tehran. Six specimens of both sexes were collected from parks, houses and apartments. The characteristics of the genus, which are the unique arrangement of six eyes in three diads, the violin shaped mark on the cephalothorax, and the short tibia of adult male palpi with narrow base and it's embolus which is about as long as the width of the globular bulb were observed and recorded. Having the cytotoxicity of the venom and its urban distribution in mind, L. rufescens is probably among the more important spider species of Iran. Since there are no reports of loxoscelism from Iran, we assume that the bites are either infrequent or misdiagnosed. Therefore further studies are needed to clarify the medical importance degree of this species.

No MeSH data available.


Related in: MedlinePlus