Dicranopalpus larvatus is redescribed based on type material. Recent first findings of this rare species on Sardinia enable to provide the essential morphological characters. Original drawings are presented with emphasis on penial and pedipalpal morphology. Dicranopalpus larvatus is a small, short-legged, ground-dwelling species endemic to Italy that matures in autumn and winter and has completed its life cycle in April. Additional information on phenology, life cycle, ecology, distribution and systematic position is given.

The pseudoscorpion genus CoprochernesBeier, 1976 currently includes two species from Central America. The type species, C. costaricensisBeier, 1976, was collected from mammal dung in Costa Rica. A restudy of the type specimens reveals that it has all of the salient morphological features of the genus NeoallochernesHoff, 1947, including only four setae on the cheliceral hand and a pair of conical spermathecae with darkened tips. Thus, Coprochernes costaricensis is transferred to Neoallochernes, forming the new combination Neoallochernes costaricensis (Beier, 1976), and rendering CoprochernesBeier, 1976 as a new junior synonym of Neoallochernes. The only other species of Coprochernes, C. quintanarooensisMuchmore, 1991 from Mexico, is also transferred to Neoallochernes, forming the new combination N. quintanarooensis (Muchmore, 1991); but, because it lacks the diagnostic features of Neoallochernes, its generic position is provisional. New illustrations are provided for N. stercoreus (Turk, 1949) based on specimens from the type locality in central Texas.

Most harvestmen emit secretions from scent glands as a secondary defence mechanism. Prior studies of Phareicranaus calcariferus described the general morphology of the ozopore, noted jet emission as the mechanism for the release of secretions, but did not investigate intraspecific variation in emissions or the morphology of the ozopore. In this study, we compared the modes of emission by adult females and alpha males and found that when seized by forceps, approximately 50% of adults emitted enteric fluids (colourless, odourless), globules of secretions near the ozopores, or jets of fluid that were directed upwards and backwards or laterally. Individuals that used jet emissions usually released secretions from one scent gland and in a single burst. We observed considerable intersexual variation with respect to the type of emissions. Females emitted jets 32% of the time (n = 28), whereas males produced jets in only 4% of our observations (1 out of 26). Males more frequently produced enteric fluid (31%) in comparison to females (14%). Our SEM-based investigation of ozopore morphology did not reveal intersexual differences in microanatomy. However, we observed intraspecific variation in the morphology of the dorsal openings and dorsal channels of the ozopores.

Poecilotheria chaojii Mirza, Sanap & Bhosale, 2014 is proposed as a junior synonym of Poecilotheria tigrinawesseliSmith, 2006 n. syn., based on morphology and distribution. The variability of morphological features given by Mirza, Sanap & Bhosale (2014) is discussed.

Tagulis granulosusSimon, 1895, from Sierra Leone, is redescribed based on the female type specimen. Morphological similarities of external and internal genitalia of T. granulosus and T. mystacinusSimon, 1895 from Sri Lanka are discussed.

A new species Eriovixia kachugaonensis sp. nov. with characteristic lanceolate abdomen in females is diagnosed and illustrated in detail based on specimens collected from Assam. We herein describe the female in detail along with digital images and illustrations.

The koinobiont ectoparasitoids of spiders in the Polysphincta genus group are divided into two well-supported clades. Species in one clade parasitize spiders in the higher araneoid group, and the behaviour of these ectoparasitoids and the parasitized host spiders is relatively well known. On the contrary, wasp species in the other clade parasitize spiders in the RTA group and their behaviour is fragmentary, being known from just a few Palaeartic species. With respect to the latter clade, we report the first host record for the monotypic genus Inbioia, the salticid Messua. The larva of I. pivai was attached to the posterior edge of the dorsal cephalothorax of Messua. The larva apparently induces the host spider to construct a final retreat, much denser than the spider's typical retreat. In the retreat, the larva kills the spider, sucks out its tissue, and then builds a thin cocoon, tightly attached to the spider retreat.

One more new species of the genus ChaerilusSimon, 1877 is described from Hon Ba Nature Reserve, which is located about 60 km to the south-west of Nha Trang, in the Khanh Hoa Province in the south of Vietnam. The new species is placed in the variegatus Species Group and compared with other Chaerilus species previously described from Vietnam. Relationships are discussed with Chaerilus longimanusKovařík & Lowe, 2015, also described from the Nha Trang region. As in previous studies, the present one suggests that different species of Chaerilus are not strongly morphologically distinct but rather correspond with micro-endemic populations. Future molecular studies should provide further evidence for or against this hypothesis.

The genus CebrennusSimon, 1880 is recorded for the first time from Iraq. A new species, Cebrennus sumer sp. nov. is described from deserts of the Abu Gaar region in Dhi Qar governorate, southern Iraq.

Three species of the genus PsalmopoeusPocock, 1895 which were described by Pocock (1903) are taxonomically reevaluated. P. ecclesiasticusPocock, 1903 is redescribed, with the genital organ morphology of both sexes illustrated and its distribution discussed. P. emeraldusPocock, 1903 is considered species inquirenda due to a lack of viable taxonomical features and P. plantarisPocock, 1903 is tentatively maintained with discussion on its described colouration. The presence of elongate lyra emergent from dark circular bases is recognised as a valuable generic differentiator but questions are raised over the validity of the stridulation organ as a viable taxonomic feature for species level identification within the genus Psalmopoeus.