Seven new species of the segmented spider genus (Mesothelae, Liphistiidae) in Thailand and Myanmar.

Seven new species of the primitive segmented spider genus are described and assigned to species groups based on characters of the male palp and vulva plate. The group includes Sivayyapram & Warrit, (♂♀) from southeastern Myanmar, Sivayyapram & Warrit, (♀) from northwestern Thailand, and Sivayyapram & Warrit, (♀) from western Thailand; the group (Complex A) contains Sivayyapram & Warrit, (♂♀), Sivayyapram & Warrit, (♂♀), Sivayyapram & Warrit, (♂♀), and Sivayyapram & Warrit, (♂♀) from central Thailand.

Three new species of the spider genus (Araneae, Mesothelae, Liphistiidae) from Thailand.

We diagnose and describe three new species of the primitively segmented spider genus from Thailand, based on male palp and female genital morphology: Zhan & Xu, (♂♀), Zhan & Xu, (♂♀), and Zhan & Xu, (♂♀). The classification of the three new species of is discussed: and are assigned to the -group, and is placed in the -group according to male palp and female genital morphology.

Phylogenomic Analysis of Ultraconserved Elements Resolves the Evolutionary and Biogeographic History of Segmented Trapdoor Spiders.

The segmented trapdoor spiders (Liphistiidae) are the sole surviving family of the suborder Mesothelae, which forms the sister lineage to all other living spiders. Liphistiids have retained a number of plesiomorphic traits and their present-day distribution is limited to East and Southeast Asia. Studying this group has the potential to shed light on the deep evolutionary history of spiders, but the phylogeny and divergence times of the family have not been resolved with confidence.

Two new species of the Southeast Asian Dwarf tarantula genus Phlogiellus Pocock, 1887 (Theraphosidae, Selenocosmiinae) and a discussion on the taxonomic problem of the genus: Addendum.

Sivayyapram et al. (2020) omitted to note the full type deposition of Phlogiellus daweiensis and Phlogiellus raveni; that is corrected herein.

Two new species of the Southeast Asian Dwarf tarantula genus Phlogiellus Pocock, 1887 (Theraphosidae, Selenocosmiinae) and a discussion on the taxonomic problem of the genus.

Phlogiellus is one of the least studied theraphosid genera; there is only one recent revision on the genus. However, the "revision" only provided several taxonomic problems in the genus by giving unclear diagnostic characters of the genus and its species, using third party information in their descriptions and many of their examined specimens of are inaccessible. Here, we discuss the taxonomic problems of the genus, and provide a new genus description and diagnostic characters of Phlogiellus by combining information from previous studies with our examinations.

Records and redescription of a mygalomorph spider genus ignored for over 100 years with a new species: the genus Atmetochilus Simon, 1887 (Araneae, Nemesiidae) in Thailand.

The wishbone spider of genus Atmetochilus Simon, 1887 (Nemesiidae: Bemmerinae) containing six species and is known from Asia. We describe a new Thai species, Atmetochilus songsangchotei sp. nov.

New species of Southeast Asian Dwarf Tarantula from Thailand: Pocock, 1897 (Theraphosidae, Selenocosmiinae).

A new record of the tarantula genus Pocock, 1897 from Thailand is described. Distributional data, natural history, morphological characters, and illustrations of male and female are provided. The Thai specimens belong to a new species, The diagnosis of the new species and related species are discussed.