'Burning Violin': The Medically Important Spider Genus Loxosceles (Araneae: Sicariidae) in Iran, Turkmenistan, and Afghanistan, With Two New Species

A new large violin spider from Argentina, with a discussion on the homology and evolution of female genital structures in Loxosceles (Araneae: Sicariidae)

Violin spiders are an old, diverse genus of spiders, which includes medically significant species. Among its members, the Neotropical laeta group is particularly notable, as it includes the largest spiders of the genus, such as Loxosceles laeta (Nicolet). In this paper, I describe a new species belonging to this group, Loxosceles galianoa , sp. nov., from male and female specimens collected in the dry Argentinean north-west. The new species is the southernmost native member of the laeta group, and its phylogenetic placement is confirmed by a novel phylogenetic analysis based on molecular data and a taxon sampling including members of all Loxosceles species groups. The morphology of the endogyne of the new species prompted me to survey and characterise the morphological diversity of the female genitalia in Loxosceles . I review the homologies of the parts of the female genitalia in this genus. I argue that an enlarged uterus externus with a narrowed opening is synapomorphic for the laeta species group, whereas in the lineage containing the rufescens and gaucho groups the uterus externus may be sclerotised and bear numerous deep transversal ridges. I here hypothesise that Loxosceles is an example of a clade where female genital morphology is more diverse and has accumulated more morphological novelties than that of males. The geographic origin of the medically significant Loxosceles laeta is briefly discussed. Although this species is commonly referred as the 'Chilean recluse spider', I here argue that this species most likely originated in Peru and has been introduced to other South American countries by human action. The type material of Loxosceles accepta Chamberlin, 1920 is examined and illustrated. Loxosceles gaucho Gertsch, 1967 is newly recorded from Argentina and Paraguay. ZooBank: urn:lsid:zoobank.org:pub:5EA253F0-4742-4031-9F34-095076B00073.

A checklist of the spiders (Arachnida: Araneae) of Afghanistan

An annotated checklist of the spiders of Afghanistan, comprising 253 species in 134 genera and 32 families, is provided. The list includes 96 and 13 currently considered endemic and subendemic species, respectively. A separate list of rejected records is also presented.

IL, Duran CFD, Cammayo MFKM, Alviola MS, Mercado SMQ, Osio CAL, Eusebio OL, Lucañas CC, Barrion AT. Integrative taxonomy reveals first record of Loxoscelesrufescens (Dufour, 1820) (Araneae, Sicariidae) in the Philippines

Background

The spider family Sicariidae Keyserling, 1880 represented by the synanthropic Mediterranean recluse spider, Loxoscelesrufescens (Dufour, 1820), is reported in the Philippines for the first time, based on morphological and molecular data. The introduced spider was observed in a small cave (Kamantigue Cave) in Lobo, Batangas Province. Considering the medical importance of this spider, the proximity of its habitat to human habitation and tourist sites poses a potential public health concern.

New information

This study reports on the first record of the family Sicariidae in the Philippines and the fourth recorded occurrence of L.rufescens in Southeast Asia.

New data on cave spiders (Arachnida: Araneae) of Iran, with new species and records

New data on Iranian spiders is provided based on 92 specimens collected from the interiors or surroundings of 27 caves. These specimens belong to 17 species in nine families, of which five species are described as new to science: Tegenaria pallens Zamani & Marusik, sp. n. (; Gakal Cave, Kohgiluyeh & Boyer-Ahmad Province) (Agelenidae); Dysdera elamana Zamani & Marusik, sp. n. (; Barreh Zard Cave, Ilam Province); and Harpactea zagros Zamani & Marusik, sp. n. (; Raad-e Gharbi Cave, Ilam Province) (both Dysderidae); Troglohyphantes megagynus Zamani & Marusik, sp. n. (; Kabootarlan Cave, Ilam Province) (Linyphiidae); and Mesiotelus iranicus Zamani & Marusik, sp. n. (; Mir Melas Cave, Lorestan Province) (Liocranidae). Additionally, two genera, Scotargus Simon, 1913 and Odontodrassus Jzquel, 1965, and three species, Odontodrassus mundulus (O. Pickard-Cambridge, 1872) and Synaphosus syntheticus (Chamberlin, 1924) (both Gnaphosidae), and Scotargus pilosus Simon, 1913 (Linyphiidae), are recorded in Iran for the first time. The newly described and recorded species are accompanied by illustrations.

The Mediterranean species of genus Loxosceles Heineken & Lowe, 1832 (Araneae: Sicariidae): Loxosceles imazighen sp. n. from Morocco and first description of the female of L. mrazig Ribera & Planas, 2009 from Tunisia

The aim of this paper is to describe a new species of the genus Loxosceles Heineken & Lowe, 1832 from Morocco, Loxosceles imazighen sp. n., and to describe for the first time a female of Loxoxceles mrazig Ribera & Planas, 2009 from Tunisia. Both species live in xeric and desert environments and are located in southern Atlas Range. Molecular phylogenetic analyses, using mitochondrial (cox1, 16S) and nuclear (H3, 28S) markers, revel that these species are closely related and that they constitute a separate evolutionary lineage of L. rufescens (Dufour, 1820) and of the set of endemic species of the Canary Islands. L. imazighen sp. n. differs from L. mrazig, the closest species morphologically and geographically, in the shapes and proportions of the male palpal tibia and the shapes and dispositions of the female seminal receptacles. In addition, L. mrazig females show morphological variability in their genitalia, mainly in the inner and outer lobes. Although that variability cannot be associated with different populations, since it also appears within individual populations, and is not related to genetic or geographic distances.