The taxonomic placement of 11 species belonging to the genus AcanthoscurriaAusserer, 1871 and one species from the genus Eupalaestrus Pocock, 1901 are re-examined. Acanthoscurria convexa (C. L. Koch, 1842) is regarded as nomen dubium because there is no holotype specimen, the original description is poor, and there are no type location data. Acanthoscurria cordubensisThorell, 1894 is redescribed and regarded as the senior synonym of Acanthoscurria suinaPocock, 1903syn. nov., Acanthoscurria borealisSchmidt & Peters, 2005syn. nov., and Acanthoscurria bolleiSchmidt, 2005syn. nov., based on similar geography, and morphology of the spermathecae, male bulb, and leg I and palpal tibial apophyses. Acanthoscurria proxima (Mello-Leitão, 1923) is regarded as nomen dubium because identification cannot be reliably determined between the two species found in the area. Acanthoscurria maga Simon, 1892 is regarded as the senior synonym of Acanthoscurria antillensisPocock, 1903syn. nov., based on similar morphology of the male bulb, and leg I and palpal tibial apophyses, and is redescribed along with the female. Acanthoscurria minorAusserer, 1871 is regarded as nomen dubium because the type specimen is lost, along with a poor description and illustration. Acanthoscurria musculosa Simon, 1892 is also redescribed and regarded as the senior synonym of Acanthoscurria sternalisPocock, 1903syn. nov., and Acanthoscurria hirsutissimasterniSchmidt, 2007syn. nov., based on similar geography, and morphology of the spermathecae, male bulb, and leg I and palpal tibial apophyses. The distribution of Acanthoscurria simoensiVol, 2000 is extended into Guyana. Eupalaestrus guyanus (Simon, 1892) is regarded as a junior synonym of Eupalaestrus campestratus (Simon, 1891) syn. nov., based on morphology of the bulb, leg I and palpal tibial apophyses.

The arachnid fauna of Nepal is poorly studied. Here, we present a literature review summarizing the current state of knowledge about the occurrence and distribution of scorpion species reported from Nepal. In addition, we offer field notes about scorpion observations made during several visits to Nepal between 1998 and 2018. Finally, we present a genus-level identification key to the scorpion taxa likely to be encountered in Nepal.

Five cases of bird entrapment in the social webs of Parawixia bistriata (Araneidae: Araneinae: Araneini) are reported from the Paraguayan Chaco. These are the first reports of avian entrapment for this species, and add one new family (Thraupidae) and four new species to the global biological inventory of bird species caught in spider webs. The wing chord and masses of the largest two species, Tyrannus melancholicus (Tyrannidae) and Columbina picui (Columbidae) greatly exceed the maximum reported for other Neotropical species. It is argued that possibility of mortality from entrapment is not merely a matter of morphometry as has been previously suggested, but includes other factors such as spider species, silk type, and area of entanglement. A possible temporal relationship between the growth and life history of this spider and the potential for entrapment is postulated. It is proposed that increased deforestation in the Paraguayan Chaco could lead to an increase in avian entrapment in this webs of this species.

The Costa Rican theraphosine Aenigmarachne sinapophysisSchmidt, 2005 is redescribed and the problematic type locality given by Schmidt (2005) is discussed. Other inconsistencies were found in Schmidt (2005), including erroneous information on urticating setae types, and are addressed. The systematic placement of AenigmarachneSchmidt, 2005 in relation to other Mesoamerican theraphosine genera is briefly discussed, within the confines of the presently available data.

The genus BerlandinaDalmas, 1922 is recorded for the first time in Iraq. A new species, Berlandina mesopotamica sp. nov., is described from southern Iraq based on two males. The main morphological characteristics and illustrations are provided.

Euryopis papulan. sp., a new species of EuryopisMenge, 1868, is described from Geumsan-gun, south-central Korea. The new species is characterized by its abdomen with dense, sclerotized spots bearing short hairs and eight markings on the dorsum, an epigyne with a semicircular atrium and a strongly sclerotized, T-shaped median band, and internal genitalia with two pairs of thick-walled, round spermathecae and a copulatory duct confined between the spermathecae. The new species was collected by pitfall trap in the deciduous layer of a coppice forest on a hillock among rice fields.

Faunistic sampling in the western Caucasus (Russian side) has yielded two new species belonging to the subgenus Neobisium (Neobisium) Chamberlin, 1930 which are described and illustrated here: Neobisium (N.) catherineaen. sp. and Neobisium (N.) kamenskyin. sp. The species Neobisium (N.) speleophilumKrumpál, 1986 is redescribed and illustrated based on the newly collected Russian material. In addition, some notes on the morphological and morphometric variations of Neobisium (N.) anatolicumBeier, 1949 andNeobisium (N.) labinskyiBeier, 1937 are given. In addition, an identification key to adults of the Neobisium (N.) species so far found in Russia is provided.

The genus NesipelmaSchmidt & Kovařík, 1996 is rediagnosed and the holotype male and paratype female of Nesipelma insulareSchmidt & Kovařík, 1996 are redescribed in detail. Additional conspecific immature specimens are reported from the collections at the Natural History Museum, London. Cyrtopholis mediaChamberlin, 1917 is transferred to Nesipelma based on stridulatory and genital organ morphology and biogeography, creating the new combination Nesipelma mediacomb. nov.

The pseudoscorpion genus Synsphyronus is widely distributed in the Australasian region, with 30 species described from Australia and two from New Zealand. This paper describes the first species to be recorded from New Caledonia: S. platnickisp. nov. Two of the three nymphal stages, tritonymph and protonymph, are described, as well as the adults.

Two exuviae from a gynandromorph specimen of the theraphosid spider Theraphosa blondi (Latreille, 1804) are illustrated and discussed. This work presents the first detailed report of gynandromorphic morphology within the exuviae of theraphosid spiders.

In the gift-giving spider Paratrechalea ornata, females mate multiple times and apparently may bias the paternity according to the nuptial gift content (nutritive or worthless). Paternity studies using microsatellite markers would, therefore, be ideal for studying male fertilization success for female offspring. We genotyped four microsatellites previously reported in one species of the genus using 43 individuals from four different localities in Uruguay. We describe the allelic and genotypic variation in all loci, and compare the findings to the reported variation for the genus. Except for one locus, all loci showed significant departure from the Hardy-Weinberg equilibrium due to heterozygote deficit. This could possibly be explained by the mixed nature of the sample and the effect of the population structure. These loci, and especially those that are highly hypervariable, are an important tool for paternity assessment and would allow a better understanding of the role of post-copulatory processes in P. ornata.

A survey of specimens identified as Trochosa urbana O. Pickard-Cambridge, 1876, kept in the Zoological Museum, University of Turku, reveals that they belong to four species: T. urbana, T. dentichelisBuchar, 1997, T. ruricola (De Geer, 1778), and T. ruricoloidesSchenkel, 1963. Trochosa urbana is redescribed based on syntypes, and a lectotype male is designated. Our study found that the actual range of T. urbana is restricted to eastern Africa (from Egypt to the Seychelles) and Israel, and not stretching from Africa to India as was thought before. Four species and one subspecies are synonymized with Trochosa urbana O. Pickard-Cambridge, 1876: Caporiaccosa arctosaeformis (Caporiacco, 1940) syn. n., Geolycosa gofensis (Strand, 1906) syn. n., Hogna sansibarensis (Strand, 1907) syn. n., Pirata molensis Strand, 1908 syn. n., and Trochosa urbana hova (Strand, 1907) syn. n. Two genera, CaporiaccosaRoewer, 1960syn. n. and TrochosippaRoewer, 1960syn. n. are synonymized with Trochosa C. L. Koch, 1847. For two species, we establish new combinations: Trochosa meruensis (Lessert, 1926) comb. n.ex Trochosippa, and Hogna taurirtensis (Schenkel, 1937) comb. n.ex Pirata. Trochosa dentichelis, previously known from Bhutan, is reported from India. Trochosa aquatica Tanaka, 1985 is likely a junior synonym of T. ruricoloides. The latter species, previously known from China, is reported for the first time from India, Indonesia, Malaysia, Papua New Guinea, and Thailand.

Specimens of a Neobisium (Pseudoscorpiones: Neobisiidae) were collected from Craig yr Aber woods, Bridgend, Wales, in November 2017. Using morphological characters and DNA barcoding of the cytochrome c oxidase subunit I gene they were identified as N. simile (L. Koch, 1873), a species new to Britain. Molecular comparison with other Neobisium specimens confirms N. simile as the most similar species (88% similarity) with which it forms a single clade, although the degree of dissimilarity could suggest an unrecognized sibling species. A detailed morphological description of N. simile from Craig yr Aber is provided, along with the DNA barcode, in view of the potential for future taxonomic revision. A probable record of N. simile from Wales in 1984 is discussed. Knowledge of the distribution and ecology of N. simile is summarized. The Welsh population of N. simile was probably introduced from the Pyrenees or south-western France, possibly with imports of raw materials for the steel industry. British pseudoscorpion workers should be vigilant for N. simile, though it may be restricted to South Wales.

A new genus of the family Sparassidae is described from Africa: Platnickopodagen. nov., occurring in Tanzania. It belongs to the subfamily Heteropodinae, sharing three promarginal teeth and intermarginal denticles, female palpal claw with slightly curved teeth, and similarly strongly developed elements of the trilobate membrane. It can be distinguished from other Heteropodinae by having more than four retromarginal teeth, AME equal to ALE or slightly larger, and posterior eye row straight to slightly procurved. Moreover, its opisthosoma exhibits a pentagonal shape. One species is newly described and is designated as type species: Platnickopoda normanisp. nov. (♂, ♀). One species, only known from females, is transferred to the new genus: P. saccata (Järvi, 1912) comb. nov. (from Rhitymna).