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Three new species of the genus Thaloe are described from Antillean region: Thaloe maricao n. sp., from Maricao, Puerto Rico and Virgin Island, Thaloe leboulet n. sp., from Le Boulet and Mariani, Haiti and Thaloe ebano n. sp., from the Dominican Republic. Females of species of this genus are described for the first time.

The new genus and species Myrmecicultor chihuahuensis Ramirez, Grismado, and Ubick is described and proposed as the type of the new family, Myrmecicultoridae Ramirez, Grismado, and Ubick. The species is ecribellate, with entelegyne genitalia, two tarsal claws, without claw tufts, and the males have a retrolateral palpal tibial apophysis. Some morphological characters suggest a possible relationship with Zodariidae or Prodidomidae, but the phylogenetic analysis of six markers from the mitochondrial (12S rDNA, 16S rDNA, cytochrome oxidase subunit I) and nuclear (histone H3, 18S rDNA, 28S rDNA) genomes indicate that M. chihuahuensis is a separate lineage emerging near the base of the Dionycha and the Oval Calamistrum clade. The same result is obtained when the molecular data are combined with a dataset of morphological characters. Specimens of M. chihuahuensis were found associated with three species of harvester ants, Pogonomyrmex rugosus, Novomessor albisetosis, and Novomessor cockerelli, and were collected in pitfall traps when the ants are most active. The known distribution spans the Big Bend region of Texas (Presidio, Brewster, and Hudspeth counties), to Coahuila (Cuatro Cienegas) and Aguascalientes (Tepezala), Mexico.

We present the first genome-wide molecular phylogeny of jumping spiders (Araneae: Salticidae), inferred from Anchored Hybrid Enrichment (AHE) sequence data. From 12 outgroups plus 34 salticid taxa representing all but one subfamily and most major groups recognized in previous work, we obtained 447 loci totalling 96,946 aligned nucleotide sites. Our analyses using concatenated likelihood, parsimony, and coalescent methods (ASTRAL and SVDQuartets) strongly confirm most previous results, resolving as monophyletic the Spartaeinae, Salticinae (with the hisponines sister), Salticoida, Amycoida, Saltafresia, and Simonida. The agoriines, previously difficult to place beyond subfamily, are finally placed confidently within the saltafresians as relatives of the chrysillines and hasariines. Relationships among the baviines, astioids, marpissoids, and saltafresians remain uncertain, though our analyses tentatively conclude the first three form a clade together. Deep relationships, among the seven subfamilies, appear to be largely resolved, with spartaeines, lyssomanines, and asemoneines forming a clade. In most analyses, Onomastus (representing the onomastines) is strongly supported as sister to the hisponines plus salticines. Overall, the much-improved resolution of many deep relationships despite a relatively sparse taxon sample suggests AHE is a promising technique for salticid phylogenetics.

The spider genus Parachemmis Chickering, 1937 (Araneae: Corinnidae: Corinninae) is reported from Colombia for the first time. Parachemmis julioblancoi sp. n. Martinez-G & Villarreal is described and illustrated from the Sierra Nevada de Santa Marta, Magdalena department. The exclusive morphology of the short and apically truncated retrolateral tibial apophysis and club-like tegular laminar process of the male palp indicates that the specimens described herein belong to a new species of Parachemmis. A map of the distribution of species in the genus is included.

Five new species of the genus Clubiona collected in Mt. Gaoligong, Yunnan Province, China are described: C. biforamina n. sp., C. dactylina n. sp., C. falciforma n. sp., C. multidentata n. sp. and C. tangi n. sp., all belonging to the corticalis species group and known from both males and females.

The spider genus Ianduba is known from seven species, all restricted to the Brazilian Atlantic rainforest, a biodiversity hotspot. The genitalic morphology of these spiders is rather peculiar and they have been considered incertae sedis in Corinnidae. We present novel morphological data for the genus, including scanning electronic microscopy images for several somatic and genitalic features, and test their phylogenetic position by including one Ianduba species in a large morphological matrix of dionychan spiders. Our results suggest that Ianduba is a true corinnid, possibly belonging in a clade sister to Corinninae. Furthermore, we here describe eight new species of the genus: I. acaraje sp.n. (Bahia), I. apururuca sp.n. (Minas Gerais to Espírito Santo), I. capixaba sp.n. (Espírito Santo), I. dabadu sp.n. (Espírito Santo), I. beaga sp.n. (Minas Gerais), I. benjori sp.n. (Rio de Janeiro), I. liberta sp.n. (Minas Gerais) and I. angeloi sp.n. (Minas Gerais to São Paulo). Six of the new species seem to be closely related to I. varia, previously considered an aberrant species. Thus, we divide the genus into two morphological groups. All species from the varia group (except for I. varia, which is synanthropic in southeastern Brazil) appear to be restricted, or more common, at altitudes of at least 800 m above sea level. We argue that unsampled montane rainforest areas from southeastern Brazil are likely to yield new records or even undescribed species of Ianduba, and that montane species are likely to be under threat of extinction. New records for previously known species are provided, the female of I. caxixe Bonaldo, 1997 is described and illustrated for the first time, and distribution maps and an identification key for the fifteen known species are provided.

The spider genus Paratus Simon, 1898 was known for more than hundred years from a single female from Sri Lanka. A survey of spiders in south China and northern India reveals two new species: P. sinensis sp. n. and P. indicus sp. n. Both species are described based on males and females. The study of the copulatory organs and somatic morphology led us to conclude that Paratus cannot be placed in any described subfamily of Liocranidae, where it was placed originally, or in Corinnidae. Therefore, we describe a new subfamily Paratinae subfam. n. and retain this group within Liocranidae.